178 articles

22 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

01:13
Read multiple frames in demuxer - Aycon Newest 'ffmpeg' Questions - Stack Overflow

I use FFmpeg.AutoGen. This is C# wrapper of ffmpeg (7.0) C++ library for reading mediafiles and generate stream of frames for other application. I want get n frames and hold pointers in memory indefinitely. However, I am completely confused trying to figure out which API is deprecated and how I can tell ffmpeg to hold the pointers in memory until I tell it to. I don't want to copy the frame after receiving it if I can avoid it. I tried many ways. My last attempt was to receive the frames using ffmpeg.avcodec_send_packet(), ffmpeg.av_read_frame() and (...) -- manual

21 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:12
Detect if an interlaced video frame is the Top or Bottom field? - Danny Newest 'ffmpeg' Questions - Stack Overflow

I'm decoding video PES packets (packetized elementary stream) containing H.264/AVC and H.265/HEVC using libavcodec like this: while (remainingESBytes > 0) int bytesUsed = av_parser_parse2( mpParser, mpDecContext, &mpEncPacket->data, &mpEncPacket->size, pIn, remainingESBytes, AV_NOPTS_VALUE, AV_NOPTS_VALUE, 0); // send encoded packet for decoding int ret = avcodec_send_packet(mpDecContext, mpEncPacket); if (ret < 0) // failed continue; while (ret >= 0) ret = (...)
14:35
My discord music bot is not playing the entire music - james12 Newest 'ffmpeg' Questions - Stack Overflow

My discord music bot based on discord.py, yt_dlp and ffmpeg is not working. I downloaded every module that is required and added environmental variables. But, my discord bot is not working properly. The bot plays the music properly at first, but the music ends before the song finishes. Full code below: import discord from discord.ext import commands import yt_dlp app = commands.Bot(command_prefix='!', intents=discord.Intents.all()) ydl_opts = 'format': 'bestaudio/best', 'extractaudio': True, (...)
15:03
Python aiortc: How to record audio and video come from client in the same file? - Chris P Newest 'ffmpeg' Questions - Stack Overflow

I have an aiortc app, which html5 client send data (microphone,camera) into server. In server side i sucessfully played this two streams seperatly. But when i try to record using aiortc MediaRecorder helper class, only the voice is recording, and the video is dropped (mp4 format). I think this is due sync issue. The audio_frame and the video_frame (each pair of them) have different time_base. (I don't know if this is strange). But it also has different time. I can share code, but couldn't help at all right now. Edit: I also tried to (...)
01:21
How to render a blend of two videos with alpha channel in python in real time? [closed] - Francesco Calderone Newest 'ffmpeg' Questions - Stack Overflow

I need to play two videos in real time in Python. One video is a background video with no alpha channel. I am using H264 but it can be any codec. The second video is an overlay video. This video with an alpha channel needs to be played in real-time on top of the first video. I am using Quicktime 444 with an alpha channel but again, it can be any codec. In terms of libraries, I tried a combination of cv and numpy, I tried pymovie, pyAV, ffmpeg... so far, all the results have been unsuccessful. When the videos render, the frame rate drops way below 30FPS, and the resulting (...)
10:41
How to render two videos with alpha channel in real time in pygame with synched audio? - Francesco Calderone Newest 'ffmpeg' Questions - Stack Overflow

I need to play two videos with synched sound in real-time with Pygame. Pygame does not currently support video streams, so I am using a ffmpeg subprocess. The first video is a prores422_hq. This is a background video with no alpha channel. The second video is a prores4444 overlay video with an alpha channel, and it needs to be played in real-tim on top of the first video (with transparency). All of this needs synched sound from the first base video only. I have tried many libraries, including pymovie pyav and opencv. The best result so far is to use a subprocess with (...)
09:51
How to render two videos with alpha channel in real time in pygame? - Francesco Calderone Newest 'ffmpeg' Questions - Stack Overflow

I need to play two videos with synched sound in real-time with Pygame. Pygame does not currently support video streams, so I am using a ffmpeg subprocess. The first video is a prores422_hq. This is a background video with no alpha channel. The second video is a prores4444 overlay video with an alpha channel, and it needs to be played in real-tim on top of the first video (with transparency). All of this needs synched sound from the first base video only. I have tried many libraries, including pymovie pyav and opencv. The best result so far is to use a subprocess with (...)
09:57
Rounded corners in subtitle (Advanced Substation Alpha [.ass]) - Leander Mihm Newest 'ffmpeg' Questions - Stack Overflow

Is it possible to have rounded corners with the BorderStyle 4 in .ass (Advanced Substation Alpha)? I only found out that the BorderStyle 4 exists, because I was looking at this stackoverflow. Is there any good and complete documentation of the Advanced Substation Alpha format? I'm currently using the following configuration: BorderStyle=4 Outline=10 --
05:49
How to improve the fluency of rtsp streaming through ffmpeg (processing 16 pictures at the same time) - Ling Yun Newest 'ffmpeg' Questions - Stack Overflow

When the button is clicked, I create 16 threads in Qt, and then pass the rtsp data address and the label to be rendered to the process, and then the process does this: run: void rtspthread::run() while(!shouldStop) openRtspStream(rtspUrl.toUtf8().constData(),index); qDebug() << "RTSP stream stopped."; emit finished(); open input stream: void rtspthread::openRtspStream(const char* rtspUrl,int index) AVDictionary *options = nullptr; AVFrame *pFrameRGB = nullptr; uint8_t (...)
04:02
ffprobe newer version detect audio codec incorrectly - alancc Newest 'ffmpeg' Questions - Stack Overflow

I find a strange problem. I have a test video with h264 video codec and aac audio codec. It is at https://drive.google.com/file/d/1YAyz5cO0kb9r0MgahCpISR4bZ_1_n8PL/view?usp=sharing I build a ffmpeg version by myself, its version is: ffprobe version 7.0.2 Copyright (c) 2007-2024 the FFmpeg developers built with gcc 14.1.0 (Rev3, Built by MSYS2 project) configuration: --enable-shared libavutil 59. 8.100 / 59. 8.100 libavcodec 61. 3.100 / 61. 3.100 libavformat 61. 1.100 / 61. 1.100 libavdevice 61. 1.100 / 61. 1.100 libavfilter 10. 1.100 / 10. (...) -- https://drive.google.com/file/d/1YAyz5cO0kb9r0MgahCpISR4bZ_1_n8PL/view?usp=sharing

20 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

13:13
How to check if OpenCV VideoCapture uses multithreading or multiprocessing internally when connecting to a camera [closed] - Chen Newest 'ffmpeg' Questions - Stack Overflow

I'm using OpenCV's cv::VideoCapture in C++ (or Python) to connect to a camera stream. I would like to know if OpenCV internally uses multithreading or multiprocessing when opening and capturing frames from the camera. Specifically, I'm curious about: Whether OpenCV spawns new threads or processes when using cv::VideoCapture. If FFmpeg is enabled as the backend, does it use multithreading or multiprocessing under the hood? How can I verify the threading or process behavior during camera streaming? What I Tried: I checked the (...)
16:50
Cannot display a decoded video frame on Raylib - gabriel_tiso Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to explore libav and raylib just to understand how audio and video work, and also to learn how to build nice interfaces using the raylib project. I've implemented a simple struct capable of decoding audio and video frames. When a video frame appears, I convert it to the RGBA format, which packs the values into 32bpp. This is the setup: if (av_image_alloc((uint8_t **)media->dst_frame->data, media->dst_frame->linesize, media->ctxs[0]->width, media->ctxs[0]->height, AV_PIX_FMT_RGBA, 1) < 0) fprintf(stderr, "Failed to setup dest image\\n"); (...) --
11:02
FFMPEG spoils the extreme pixels when converting and cropping images [closed] - Jacob Newest 'ffmpeg' Questions - Stack Overflow

I have a side image processing task in my work. I am using the following command to translate a spherical panorama into a cubemap: Path/ffmpeg.exe -i "Path/PanoImageInput.png" -vf v360=equirect:c6x1:fin_pad=64:out_frot=002200,scale=-1:2048:flags=neighbor "Path/CubemapOutput.png" And then I slice it into separate images, 1 face for example: Path/ffmpeg.exe -i "Path/CubemapOutput.png" -vf crop=2048:2048:0:0 -sws_flags neighbor "Path/face_1.png" I get artifacts on both cubemap and images of this kind that really bother me: Cubemap image junction The junction (...) -- Cubemap image junction, The junction and part of the edge of the cubemap image
10:23
LibAV: converting PTS to frame number - Michael IV Newest 'ffmpeg' Questions - Stack Overflow

I am developing an mp4 demuxer with LibAV. I need a helper function which converts PTS to frame numbers. I came up with the following code which works. But I am not sure how correct it is in the LibAV realm for any video input. In my case video fps = 25, timescale = 25000. Each next PTS is incremented by 40,giving me correct frameNumber. static double get_frame_rate(AVStream* stream) if (stream->r_frame_rate.num > 0 && stream->r_frame_rate.den > 0) return av_q2d(stream->r_frame_rate); else if (stream->avg_frame_rate.num > 0 && (...)
08:05
How to stop ffmpeg remotely? - Adam Newest 'ffmpeg' Questions - Stack Overflow

I'm running ffmpeg on another machine for screen capture. I'd like to be able to stop it recording remotely. FFMPEG requires that q is pressed to stop encoding as it has to do some finalization to finish the file cleanly. I know I could kill it with kill/killall however this can lead to corrupt videos. Press [q] to stop encoding I can't find anything on google specifically for this, but some there is suggestion that echoing into /proc//fd/0 will work. I've tried this but it does not stop ffmpeg. The q is however shown in the terminal (...)
07:57
How to adjust audio volume with AVFilter API from FFmpeg in Linux? - wangt13 Newest 'ffmpeg' Questions - Stack Overflow

I am working on an embedded Linux system (kernel-5.10.24), and developing an audio player by using FFmpeg and ALSA libraries. Now the basic functions are done, and I can play MP3 file by using AVCodec and SWresample interfaces of FFmpeg. int decode_play(void) ..... while (1) if (av_read_frame(pfmtctx, packet) < 0) avcodec_flush_buffers(pcodectx); printf("Got end of media, breaking\\n"); break; if (packet->stream_index != stream) continue; int res = avcodec_send_packet(pcodectx, packet); if (res < 0) (...)
01:18
ffmpeg underutilizes cpu on AWS EC2 instance [closed] - Denis Newest 'ffmpeg' Questions - Stack Overflow

i'm running video encoding with ffmpeg on EC2 instance (c5.xlarge - 4 vcpus) ffmpeg \\ -i "$INPUT_URL" \\ -c:v libvpx-vp9 -b:v 1M -threads 4 \\ -tile-columns 1 -frame-parallel 1 \\ -row-mt 1 \\ -cpu-used 0 \\ -quality 1 \\ -speed 3 \\ -r 6 \\ -f segment -segment_time "$SEGMENT_DURATION" -reset_timestamps 1 \\ "$OUTPUT_DIR/$OUTPUT_FILE_PREFIX$(date +%s)%03d.webm" > ffmpeg.log 2>&1 & I expected the CPU utilization to be around 390%, but I observed it to be around 170% via top why and what i'm doing (...)
00:16
iOS Radio App: Need to extract and stream audio-only from HLS streams with video content - Bader Alghamdi Newest 'ffmpeg' Questions - Stack Overflow

I'm developing an iOS radio app that plays various HLS streams. The challenge is that some stations broadcast HLS streams containing both audio and video (example: https://svs.itworkscdn.net/smcwatarlive/smcwatar/chunks.m3u8), but I want to: Extract and play only the audio track Support AirPlay for audio-only streaming Minimize data usage by not downloading video content Technical Details: iOS 17+ Swift 6 Using AVFoundation for playback Current implementation uses AVPlayer with AVPlayerItem Current Code Structure: class StreamPlayer: (...) -- https://svs.itworkscdn.net/smcwatarlive/smcwatar/chunks.m3u8, https://mbcfm-radio.mbc.net/mbcfm-radio.m3u8
00:06
ffmpeg command not found but pip list shows ffmpeg - your_doomsday07 Newest 'ffmpeg' Questions - Stack Overflow

I have been trying to install ffmpeg using the command pip install ffmpeg and I am doing this in a server where we dont have sudo permissions. On writing ffmpeg I get ffmpeg: command not found. Then I checked with pip list and it showed ffmpeg. Please help me.

19 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:26
Accurately calculate concatenated audio file size without actually concatenating for rss enclosure length - askrill Newest 'ffmpeg' Questions - Stack Overflow

A little background. Im working on implementing DAI into a podcast hosting and the solution I’m working with is splitting the audio file for mid role ads and then just concatenating the files with the ad in middle. All files will be the same encoding, bitrate… what I need to figure out is what to put as the length of the encloser in the rss feed. In addition if the ad is gonna change per request then there’s no way to keep that encloser length accurate unless all the ads are the same (...)
20:55
FFmpeg MOV to MP4, do I also need .OGG , .WEBM files too? - Chris Newest 'ffmpeg' Questions - Stack Overflow

I am new to FFmpeg and I'm just getting started. I have the two following commands to take a .mov upload and downsize it and save it out as an .mp4. I also produce a thumbnail version of the same. What I am doing here seems to work well and I manage to get the .mov file from 12.5mb to about a 1mb .mp4. My question from here is, can I get away with only providing a .mp4 for the source video, or do I need to provide additional .ogg and/or .webm files too? An if so, how is that best achieved? Would I have to loop that FFmpeg command again to output new .ogg and .webm (...)
15:28
ffmpeg fails to convert several ts files into one mp3 - Nadia Ghebreial Newest 'ffmpeg' Questions - Stack Overflow

I'm joining several .ts files into one .mp3 file like this: import ffmpeg from 'fluent-ffmpeg' const tsDest = 'dir/file.ts' const mp3Dest = 'dir/file.mp3' const ff = ffmpeg(urls[0]) urls.slice(1).map(url => ff.input(url)) ff.on('error', function (err) logger.error('An error occurred: ' + err.message) reject(err) ) .on('end', function () return ffmpeg(tsDest) .videoCodec('libx264') .audioCodec('libmp3lame') (...) -- https://github.com/damianociarla/node-ffmpeg/issues/101
12:31
ffmpeg crash when updating overlay file (c# console app) - Vlad Stefan Newest 'ffmpeg' Questions - Stack Overflow

I am trying to develop a colsole app that can record the screen and have cpu/ram/gpu usage of the machine noted on the recording. The problem i am facing is that after a while (2-3 hours) the recording stops because ffmpeg is trying to read the filetext while my C# code tries to update the file. I managed to find out that I should use a temp file and replace the original instead of rewriting the whole file but that way I encounter another problem, ffmpeg will try to read the file while the file is replaced or even for that split second when is considered deleted. Any ideas what I should (...)
11:31
Encapsulation of raw opus frames to ogg using ffmpeg.autogen - Miloš Šula Newest 'ffmpeg' Questions - Stack Overflow

I need to encapsulate raw opus frames ( from rtpdump similar format ), but i have trouble with function ffmpeg.avformat_write_header - Error writing opus headers -1094995529 public unsafe class OpusMuxer public static void ConvertRawOpusToOggOpus(string inputPath, string outputPath, int sampleRate = 48000, int channels = 2) ffmpeg.av_log_set_level(ffmpeg.AV_LOG_INFO); AVOutputFormat* fmt = ffmpeg.av_guess_format("ogg", null, null); if (fmt == null) Console.WriteLine("Nepodařilo se zjistit výstupní formát (ogg)."); (...)
09:28
FFmpeg `FileNotFoundError` ([WinError 2]) when probing a video file in Python - Mannu Newest 'ffmpeg' Questions - Stack Overflow

I'm encountering a FileNotFoundError with the message [WinError 2] The system cannot find the file specified when trying to probe a video file using the Python ffmpeg-python library. This occurs despite the file existing, being readable, and having the correct path. I have verified file existence and permissions in my script. Here's the relevant output and my Python code: Output: Checking sample folder contents... Script location: C:\\Users\\me\\A\\B\\ProjFile\\vid_pro_tool\\src\\video_processing\\video_compressor.py Project root: (...)
04:39
[ffmpeg]How to use libfdk_aac to encode pcm to constant bitrate - qyt Newest 'ffmpeg' Questions - Stack Overflow

I have tried both libfdk_aac and aac, but the encoded PCM audio always has a variable bit rate. Why is this happening? How can I make it encode with a constant bit rate The code is as follows: #include #include #include extern "C" #include #include #include #include #include #include #include #include #include #include #include #include int main(int argc, char** argv) AVCodecContext* codec_context = NULL; const AVCodec* codec = NULL; AVFrame* frame = NULL; AVPacket* (...)

18 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:36
sws_scale YUV --> RGB distorted image [closed] - Sami susu Newest 'ffmpeg' Questions - Stack Overflow

I want to convert YUV420P image (received from H.264 stream) to RGB, while also resizing it, using sws_scale. The size of the original image is 480 × 800. Just converting with same dimensions works fine. But when I try to change the dimensions, I get a distorted image, with the following pattern: changing to 481 × 800 will yield a distorted B&W image which looks like it's cut in the middle 482 × 800 will be even more distorted 483 × 800 is distorted but in color 484 × 800 is ok (scaled correctly). Now (...)
20:12
I need assistance of making a automated script for ffmpeg [closed] - user2614404 Newest 'ffmpeg' Questions - Stack Overflow

Currently i use this script that GPT generated: ffmpeg -c:v av1_qsv -b:v 0 -global_quality 20 -preset veryslow -look_ahead 64 -c:a copy -c:s copy G:\\1ARC-movies\\A-View-to-a-kill.mkv -i Y:\\media\\Movies\\A_VIEW_TO_A_KILL_t05.mkv But sadly GPT being gpt, it hallucinates answers, and none of it's deeper automation code scripts were working when it made the scripts for a .ps1 script file. And as i find most of the docs quite overwhelming, i need help to simplify what i need. As i learn best when i get explained what i currently try to do, and not every variable ffmpeg can (...)
14:16
How can I render a video in real time with custom parameters? - Joaquín L. Robles Newest 'ffmpeg' Questions - Stack Overflow

Is it possible to render a video in real time with custom parameters? I'm trying to inject some parameters (text, image and other video portions) into a video template depending on user parameters, like the "Facebook 10 Years video".. The output format should be any video format such as H.264. I've been googling and asking and the closest I got is to make a video from HTML5 canvas captures, which I think is totally inefficient. Any insight or guidance would be great, (...) -- make a video from HTML5 canvas captures
11:47
python - record and preview webcam at the same time, using e.g. ffmpeg - Jan Oechsler Newest 'ffmpeg' Questions - Stack Overflow

I want to record webcam with sound using python. After tryng multiple different methods, ffmpeg with the python wrapper showed the best results. Recording works, but how can I preview the webcam at the same time, so I know where I am pointing the cam at? I've seen this post, but I dont understand how I could implement this in python, using the wrapper. Any ideas on how to do this? Or if there is another, easier, solution to record webcam video with sound and preview it simultaneously from within a python (Qt) application? This is my code so far: import (...)
10:16
Create a bat file to exit FFMPEG (Windows) - user3812737 Newest 'ffmpeg' Questions - Stack Overflow

Hello everyone I am using this bat file in order to capture my screen. ffmpeg -f dshow -i video=screen-capture-recorder -r 240001001 -q 1 lma_recording.avi When I press the q button the video capture stops. However I would like to stop the screen capturing with another bat file. I have tried this: taskkill /im ffmpeg.exe without luck Any suggestions?

17 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

15:37
Recursively convert images in each subfolder into individual videos using FFmpeg - arutan edram Newest 'ffmpeg' Questions - Stack Overflow

I am using this script to convert all images in a folder into a video. Each image is shown for 4 seconds and the script runs from a bat file. `ffmpeg -framerate 1/4 -i %%03d.jpg -pix_fmt yuv420p video.mp4` I have hundreds of subfolders each containing images with the same resolution and I want to convert them into one moive per subfolder. I might be close to a solution but it still does not do the job ⓐecho off setlocal enabledelayedexpansion :: Set the frame rate and file format set "framerate=1/4" set "image_format=%%03d.jpg" set (...)
22:00
OpenCV VideoWriter using ffmpeg with "Could not open codec 'libx264'" Error - user2262504 Newest 'ffmpeg' Questions - Stack Overflow

I am new to OpenCV, and I want write Mat images into video using VideoWriter on Ubuntu 12.04. But when constructing VideoWriter, errors came out. It seems that OpenCV invoke ffmpeg API using default parameters and ffmpeg invoke x264 using its default parameters. Then these setting is broken for libx264. Thus the "Could not open codec 'libx264'" error. Anyone has ideas to solve this problem? More specifically: anyone knows where and how OpenCV invoke ffmpeg API? how to change ffmpeg default settings using code, hopefull, can be (...)
19:04
Optimizing FFmpeg/x264 Configuration for Ultra-Low Latency UDP Streaming [closed] - pourjour Newest 'ffmpeg' Questions - Stack Overflow

I'm implementing a real-time screen streaming application using FFmpeg's libraries (libavcodec, libavformat) with H.264 encoding and UDP transport. While I have basic low-latency settings in place, I'm looking to minimize latency as much as possible while maintaining reasonable quality. Here's my current encoder configuration: // Configure codec for low latency codecContext->width = WIDTH; codecContext->height = HEIGHT; codecContext->time_base = AVRational1, FPS; codecContext->framerate = AVRationalFPS, 1; codecContext->pix_fmt = (...)
15:23
FFmpeg live editing - NikxDa Newest 'ffmpeg' Questions - Stack Overflow

I am trying to create a video editing tool in HTML/CSS and PHP. For the video editing, I am using ffmpeg. Now, the file upload and the general editing works pretty well, but I have a problem. I would like to preview the final result inside an HTML video-tag. Thus, wenn I upload 4 clips and then select seconds 5 to 10 to be cut out, I'd like to immediately view the result so I can decide whether I want to keep it or not. Does FFmpeg support something like this? If not, what would be the best solution? (...)

16 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

15:12
How do I get video frame buffer stream from a connected GoPro camera? - cleanrun Newest 'ffmpeg' Questions - Stack Overflow

I'm creating an app that can connect to a GoPro camera and I want to get the frame buffer stream from the connected GoPro camera and use it on my iOS app (by converting the buffer data into CMSampleBuffer). I'm currently trying to use the FFmpeg library but so far it doesn't work. Here's the logic I've implemented (I'm using ChatGPT to generate the code): import Foundation import CoreMedia import AVFoundation import ffmpegkit final class FFmpegBufferProcessor: AnyBufferProcessor weak var delegate: (...) --
12:17
How to Match ASS Subtitle Font Size with Flutter Text Size for a 1080p Video? - Mostafa Fathi Newest 'ffmpeg' Questions - Stack Overflow

I’m working on a project where I need to synchronize the font size of ASS subtitles with the text size a user sees in a Flutter application. The goal is to ensure that the text size in a 1080p video matches what the user sees in the app. What I've Tried: Calculating font size using height ratio (PlayResY/DeviceHeight): I used the formula: FontSize_ASS = FontSize_Flutter * (PlayResY / DeviceHeight) While the result seemed logical, the final output in the video was smaller than expected. Adding a scaling (...)
10:48
ffmpeg_kit_flutter_full : Video created from ffmpeg not showing in the web - Đoàn Thanh Thảo Newest 'ffmpeg' Questions - Stack Overflow

I am implementing a screen capture widget to create a video. The video was successfully created in MP4 format and I can view it in my app and then I posted it to my web. However, on the web, I cannot see the video preview, only when I download the video and view it on my phone can I see it. I think the problem is that there is some missing format that makes the video not playable on Https. Here is my code: final command = '-y -f image2 -i $imagesPath ' '$fps != null ? "-r $fps" : "" ' '-vf "scale=2000:5000" ' // '-vf (...)
05:03
ffmpeg hstack long list of files [closed] - Elle Fiorentino-Lange Newest 'ffmpeg' Questions - Stack Overflow

I have 1920 images that are 1920x1080 in resolution. I've sliced each image into 1x1080 slices. They are in folders labeled img0001_slices, img0002_slices, ... img1920_slices. In the folders the slices are labeled img0001_slice_0, img0001_slice_1, ... img0001_slice_1919. I want to use ffmpeg to form new images out of the slices. New image one should be the first slice of all the original images lined up horizontally from img1920 on the left to img0001 on the right. New image two should be the second slice of the original images in the same order, new image three should be the third, (...)
04:28
ffmpeg complex concat audio [closed] - s0mbre Newest 'ffmpeg' Questions - Stack Overflow

I've got one video file (let's say "vid.mp4") and two audio files ("1.aac" and "2.aac") as inputs. I need to replace two parts in the original video's sound track with these two new audios, while retaining the original video track. The first cutout is at timecode from 0.44 to 1.85 sec. The second is from 15.6 sec to end of video. I'm doing it like this: ffmpeg -y -i vid.mp4 -i 1.aac -i 2.aac -filter_complex "[0:a]atrim=end=0.44[a1]; [0:a]atrim=start=1.85:end=15.6; [a1][1:a][a2][2:a]concat=n=4:v=0:a=1[a]" -map 0:v -map "[a]" -c:a aac out.mp4 But (...)
02:42
ffmpeg concat and preserve metadata streams - Andrew Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to concat multiple files that are the result of a GoPro Hero6 splitting movies to avoid the FAT 4GB limit. ffmpeg works great for this purpose but I need the telemetry data that is encoded in the metadata streams, and ffmpeg by default doesn't seem to preserve this. Using the ffprobe command you can see that the source videos have: Stream #0:3(eng): Data: none (gpmd / 0x646D7067), 36 kb/s (default) Metadata: creation_time : 2018-07-15T16:16:26.000000Z handler_name : GoPro MET I know from research that this is the stream I need (...)

15 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

10:21
how to change ffmpeg time format information? [closed] - Martin Martin Calden Calden Newest 'ffmpeg' Questions - Stack Overflow

I am using the freezedetect filter and the time format keeps appearing as seconds. that is really bothering me because I need to calculate it to minutes for editing and it takes time. how can I change the default time format to hh:mm:ss ? this is the command I use to detect freezeframe: ffmpeg -i freeze.mp4 -vf "freezedetect=n=-60dB:d=1" -map 0:v:0 -f null - I am not really understand how to change it. and this is the result: [freezedetect ⓐ 0000025e6b92ee80] lavfi.freezedetect.freeze_start: 348.958008 [freezedetect ⓐ 0000025e6b92ee80] (...)
22:11
hls.js unable to maintain seek with live video [only] stream - Rob Newest 'ffmpeg' Questions - Stack Overflow

I am encoding a live 25 FPS 950x540 H.264 video-only stream using the latest (built from source) FFmpeg, 10 segments in the manifest, each of 5 seconds, and consuming that stream on another machine on my local LAN in [incognito to avoid cache issues] Chrome with the latest hls.js (cdn.jsdelivr.net/npm/hls.jsⓐlatest). The encoded video plays but not reliably; I have two problems: When the stream is running, the hls.js client starts to be unable to sync with the video stream after a few minutes, complaining of being beyond the end of the sync window and, on re-sync, getting empty (...) -- https://github.com/RobMeades/watchdog/blob/83e718390f779a7ef98d2be009784e8be5deaf5f/software/watchdog.cpp#L933
06:50
FFmpegKit in Flutter fails with configuration output on Android - ashvin jadav Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg_kit_flutter in my Flutter app to add a text overlay to a video. However, when I try to execute the FFmpeg command, I get an output similar to this: configuration: --cross-prefix=aarch64-linux-android- --sysroot=/Users/sue/Library/Android/sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/darwin-x86_64/sysroot --prefix=/Users/sue/Projects/arthenica/ffmpeg-kit/prebuilt/android-arm64/ffmpeg --pkg-config=/opt/homebrew/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --target-os=android --enable-neon --enable-asm --enable-inline-asm --ar=aarch64-linux-android-ar (...)

14 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:40
How to download ffmpeg utilities into Python venv with pip or manual way for torchaudio - Furkan Gözükara Newest 'ffmpeg' Questions - Stack Overflow

torchaudio requiring avutil and other binary dll files Source : https://pytorch.org/audio/2.3.0/installation.html However they given example only for Anaconda I am not using Anaconda but I am using Python 3.10.11 pip venv I can't find these DLL files anywhere How can I find and install them into Python venv? Since I can't find, I am getting below error Traceback (most recent call last): File "R:\\MMAudio_v1\\MMAudio\\venv\\lib\\site-packages\\gradio\\queueing.py", line 625, in process_events response = await route_utils.call_process_api( (...) -- https://pytorch.org/audio/2.3.0/installation.html
15:08
Getting time codes in video files easier - Arete Newest 'ffmpeg' Questions - Stack Overflow

I am going through some videos to trim them (extracting parts of the video). I know there is billions of software out there that can trim videos easily, but I haven't found any that does not recode the result. My method right now is to open the video in MPC-BE -> play -> pause -> note down the time -> resume to find a place end the clip -> pause -> note down the end time for the clip. Then I take the time codes and use ffmpeg to extract the part. Usually with something like: ffmpeg -i input.mp4 -ss 01:50:00 -to 01:55:00 -c:v copy -c:a copy output.mp4 My (...) -- TMPGEnc MPEG Smart Renderer 6
22:41
FFMPEG audio 0.1ms stutter but video is smooth [closed] - c0de b0unty Newest 'ffmpeg' Questions - Stack Overflow

I have videos in a folder unprocessed and i'm also using inotifywait to check the folder for new sub folders for videos and process them automatically.... Problem i have is with ffmpeg and stuttering audio in segments while video is smooth. I notice it's just a small stutter like gibberish for 0.1ms in random segments but no desync. It's annoying to have this small stutter. Also source MP4 file has smooth audio and video. I have 100K+ Videos pending HLS processing and files have different dimensions i added the checks for it in the script but ffmpeg keeps (...)
19:21
FFmpeg/Next.js15 How to serve converted MKV stream to MP4 stream - user28760545 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to serve a video stream using Next.js 15, and using FFmpeg to convert the video stream from MKV to MP4 so it can display on a majority of web browsers. I seem to be able to convert it successfully returning a 200 status code but nothing seems to pop up. Perhaps I am serving the converted chunks wrongly. /app/api/stream/route.ts import spawn from "child_process"; export async function GET(request) const mkvStream = getMKVStream(); const ffmpeg = spawn("ffmpeg", [ "-i", "pipe:0", "-f", "mp4", "-movflags", (...)
18:33
Unexpectedly bad quality metrics of VVC encoded video [closed] - Wieprzek Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a project where I'm comparing a number of codecs via SSIM, PSNR and VMAF. Im getting really bad results for VVC (libvvenc) (0.23 ssim, 9.46 VMAF), even though the output doesn't look that bad. My scores for other codecs with default settings are around 0.88-0.96 SSIM and around 90 VMAF. As my input I use raw videos from xiph.org I first encode it: ffmpeg -i city_cif.y4m -c:v libvvenc city_cif_libvvenc.mp4 then I decode it back to raw, although I have to set output format to .yuv since y4m doesnt support the only pixel format libvvenc (...) -- xiph.org
02:20
ffmpeg command to create thumbnail sprites - FI-Info Newest 'ffmpeg' Questions - Stack Overflow

To output a single frame from ffmpeg I can do: ffmpeg -i input.flv -ss 00:00:14.435 -vframes 1 out.png And to output an image every second, I can do: ffmpeg -i input.flv -vf fps=1 out%d.png Would there be a way to create a thumbnail sprite from these outputs to help with the creation of a vtt file for thumbs on seek position?

13 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

11:23
Why is MoviePy taking hours to generate a few minutes of video, and are there faster alternatives? [closed] - Michael Ohana Newest 'ffmpeg' Questions - Stack Overflow

I’m working on a project that involves creating personalized courses and exploring automated video generation. Currently, I’m using MoviePy to generate videos, but I’m encountering significant performance issues—generating just a few minutes of video with basic text overlays and audio integration is taking hours. Are there ways to optimize MoviePy for faster performance? Are there better tools, frameworks, or APIs (e.g., FFmpeg or others) for similar tasks? Any guidance, recommendations, or examples of implementations would be greatly (...)
13:49
How to Turn image A + audio + A into Video A with the exact same attributes of Video B so both can be concatenated without encoding [closed] - Furkan Gözükara Newest 'ffmpeg' Questions - Stack Overflow

I have image A and it is PNG I have audio A and it is MP3 I have video B that can be any format, resolution, encoding, audio, etc Now I want to turn image A + audio A into video A with the exact attributes of video B so that I can concatenate them without encoding Here my so far code which is failing. I am using Python and latest version of FFMPEG with most codecs and features def get_video_info(video_path): cmd = [ FFPROBE_PATH, '-v', 'quiet', '-print_format', 'json', (...)
03:41
Integrating FFMpeg in Native Android Application with C++ results in bunch of errors [closed] - BraveEvidence Newest 'ffmpeg' Questions - Stack Overflow

I need to integrate ffmpeg in my android app, i don't want to usee ffmpegkit as that is not properly maintained, i cloned ffmpeg-android-maker and then ran ./ffmpeg-android-maker.sh it created build folder and output folder, The output folder looks like this I have created a kotlin android project using android studio, so i have written all the code to pick the video and i have the video uri with me in kotlin, i also added a C++ module with help of Android studio and it did all the configuration in build.gradle and also created CMake file for me. For now (...) -- ffmpeg-android-maker, , Here
14:00
Laravel in how we can upload large size video with Repeater data with multi language - Darshan Malani Newest 'ffmpeg' Questions - Stack Overflow

In the Laravel how we can upload large size data with multiple language video as well once video upload i need it on chunk how we can do ? Here is DB structure once specific program upload chunk data i need something like this way with multiple lang based data -- ,
09:22
ffmpeg gdigrab support prebuilt library - Haris Newest 'ffmpeg' Questions - Stack Overflow

I am using this build for Windows 64 with MSVC compiler, I need to capture screen using C++ code using gdigrab, but I can see: Error: Input format not found: gdigrab So just checked using the code for gdigrab: const AVInputFormat *fmt = nullptr; void *opaque = nullptr; while ((fmt = av_demuxer_iterate(&opaque))) qDebug() << fmt->name; But does not print gdigrab Then I check the build config for ffmpeg using .\\ffmpeg.exe -buildconf Which do not include --enable-gdigrab But when I check the (...) -- build, https://github.com/BtbN/FFmpeg-Builds/issues/428

12 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:19
Compiling ffmpeg with alpha channel support in libx265 [closed] - AnB Newest 'ffmpeg' Questions - Stack Overflow

I need to encode a transparent video in the H.265/HEVC format. Recently, the x265 software encoder library used by ffmpeg has added support for the alpha channel (docs). I compiled ffmpeg as per the instructions from here with the required ENABLE_ALPHA option set during build of libx265. However, when I execute ffmpeg -h encoder=libx265, there are no supported pixel formats with the alpha channel: Encoder libx265 [libx265 H.265 / HEVC]: General capabilities: dr1 delay threads Threading capabilities: other Supported pixel formats: yuv420p yuvj420p yuv422p yuvj422p (...) -- docs, here
13:00
Automate removing segments of a video using ffmpeg-python - Hriday NS Newest 'ffmpeg' Questions - Stack Overflow

I'm very new to ffmpeg and unable to wrap my head around the concepts entirely. My goal for this little script I've been working on all day is to: Step 1: Read a list of timestamps from a text file like so: 00:00 - 00:14 00:30 - 00:45 So that works: for me: def read_timestamps(file_path): timestamps = [] with open(file_path, 'r') as f: for line in f.readlines(): match = re.match(r'(\\d1,2):(\\d2) - (\\d1,2):(\\d2)', line.strip()) if match: start = int(match.group(1)) * 60 + int(match.group(2)) # (...)

11 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:08
FFMPEG vsync drop and regeneration - Lhh92 Newest 'ffmpeg' Questions - Stack Overflow

According to the ffmpeg documentation vsync parameter Video sync method. For compatibility reasons old values can be specified as numbers. Newly added values will have to be specified as strings always. drop As passthrough but destroys all timestamps, making the muxer generate fresh timestamps based on frame-rate. It appears that the mpegts mux does not regenerate the timestamps correctly (PTS/DTS); however, piping the output after vsync drop to a second process as raw h264 does force mpegts to regenerate the PTS. Generate test (...)
07:39
Adjust the audio balance dynamically in FFmpeg for a specific time range [closed] - Lipa Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a video editing task using FFmpeg and want to adjust the audio balance dynamically for a specific time range within a video. For example, I want to change the volume of the left audio channel to 50% and the right audio channel to 125% between 7 and 9 seconds of the clip. After this time range, the audio should return to its original balance. I already tried using the pan filter: ffmpeg -i input.mp4 -af "pan=stereo|c0='if(between(t,7,9),0.5,1)*c0|c1='if(between(t,7,9),1.25,1)*c1'" output.mp4 However, it seems pan doesn't (...)
13:45
Hit noise when playing part of wave file with ALSA PCM interface - wangt13 Newest 'ffmpeg' Questions - Stack Overflow

I am working a WAVE file playing with ALSA PCM interface in Linux, and I heard noise when I played the file quickly and partially. Here is my playing function. static int playback_function(uint8_t *pcm_buf, int pcm_frames) int rc; uint8_t *buf; int frame_size, sent; int periodsize; int left; frame_size = chan * av_get_bytes_per_sample(AV_SAMPLE_FMT_S16); periodsize = sys_periodsize; // 320 in my system buf = pcm_buf; left = pcm_frames; sent = 0; while (left > 0) sent = (left > periodsize) ? periodsize : (...)
12:35
Is there any Android lib that can be used to split mp4 files in the GOP dimension? - Chaojie Mo Newest 'ffmpeg' Questions - Stack Overflow

An mp4 file consists of meta information and a set of GOPs. Now i want to split mp4 files in the GOP dimension and then every GOP with meta information is recombined into a new file. Is there any feasible solution?

10 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

14:33
FFmpeg H.264 NVENC - high444p profile not working at 1920x1080 via library but works via command line encoding - Vivek Nathani Newest 'ffmpeg' Questions - Stack Overflow

I am building a real-time desktop streaming application in Rust and I am using FFmpeg (H.264 NVENC) to encode the raw frames captured as BGRA from desktop. I am able to get it to work on profiles such as baseline, main, and high but nothing seems to be working on high444p which is what I need to do 4:4:4 chroma subsampling. Below is the setup I have for constructing the encoder. I am using the rust-ac-ffmpeg crate to do this. builder = builder .pixel_format("bgra") .height(1080) .width(1920) .set_option("profile", "high444p") .set_option("preset", (...) -- rust-ac-ffmpeg
04:46
How two receive two video streams and output as a single video stream, using ffmpeg and in multicast? [closed] - Shodan Newest 'ffmpeg' Questions - Stack Overflow

I am trying to stream two UDP video stream to LAN multicast Have one computer receive these multicast streams, combine them side by side and re-transmit them as a single stream For testing purposes I stream two test files as follows ffmpeg -re -i testfile1.mp4 -c copy -f mpegts udp://239.0.0.1:9991 ffmpeg -re -i testfile2.mp4 -c copy -f mpegts udp://239.0.0.1:9992 On another computer, I can watch either of these stream while they are outputting using this test command ffplay -hide_banner -fflags nobuffer -flags low_delay -probesize 32 -analyzeduration (...) -- https://youtu.be/DDxBpH_jSQs
07:09
How to run FFmpeg command in Java (Windows) - SAI GIRI CHARY AOUSULA Newest 'ffmpeg' Questions - Stack Overflow

I executed the below FFmpeg terminal command in command prompt successfully. But I am unable to execute this command in my Java program. I can execute all other FFmpeg commands which doesn't have double quotation marks in my Java program. Here I have problem only with double quotation marks("..."). ffmpeg -i "concat:C:\\\\journalism\\\\videos\\\\vid1.ts|C:\\\\journalism\\\\videos\\\\vid2.ts" -c copy C:\\\\journalism\\\\videos\\\\output.mp4 I can execute above in command prompt successfully. But I tried as below in my Java code: Runtime.getRuntime().exec("C:\\\\ffmpeg\\\\bin\\\\ffmpeg -i (...)
00:34
Stream sent via FFMPEG (NodeJS) to RTMP (YouTube) not being received - Qumber Newest 'ffmpeg' Questions - Stack Overflow

I am writing a very basic chrome extension that captures and sends video stream to a nodeJS server, which in turns sends it to Youtube live server. Here is my implementation of the backend which receives data via WebRTC and send to YT using FFMPEG: const express = require('express'); const cors = require('cors'); const RTCPeerConnection, RTCSessionDescription = require('ⓐroamhq/wrtc'); const spawn = require('child_process'); const app = (...)
00:02
avformat_write_header return error code when trying to write video with G711U audio avi file - denn Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to make an avi file from a video/audio stream. When audio is AAC it works fine. But I cannot pack G711U audio. av_register_all(); avcodec_register_all(); av_log_set_callback(nullptr); av_format_context_ = avformat_alloc_context(); if (!av_format_context_) std::string error_msg = "Failed to allocate avformat context"; log_->Error(error_msg); throw std::runtime_error(error_msg.c_str()); av_format_context_->oformat = av_guess_format("mp4", filename.c_str(), NULL); strcpy(av_format_context_->filename, (...)

9 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

11:55
FFMPEG How to zoom in on video [closed] - Map Jiawu Newest 'ffmpeg' Questions - Stack Overflow

I'm doing a zoom out of a video like this : ffmpeg -i "input.mp4" -vf "fps=60,scale=8000:-1,zoompan=z='pzoom+0.0002':x=iw/2-(iw/zoom/2):y=ih/2-(ih/zoom/2):d=1:s=1920x1080:fps=60" -t 5 -c:v libx264 -pix_fmt yuv420p "output.mp4" now How I do the oposite? Start from the max zoom position and go to the original video zoom? Thanks!
21:03
Issues with Video Recording Duration and Smooth Playback when Using v4l2 framework to MP4 (FFmpeg) - Reena Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to record a video from a USB device with v4l2 framework and save it in MP4 format using FFmpeg. My sample code successfully captures and saves the video, but I'm running into some issues: The recorded video duration is shorter than expected. For instance: When recording a 1-minute video at 1280x720, the output file only has 58 or 59 seconds. For 1920x1080, the duration is even more off — only about 28 or 30 seconds, instead of the expected 1 minute. Additionally, the video is not smooth. There are noticeable drops in frames and playback inconsistencies. (...)
14:38
libopenmpt ⓐ 0000024ec3fc9400c Format libopenmpt detected only with low score of 1, misdetection possible [closed] - cao ting Newest 'ffmpeg' Questions - Stack Overflow

When I want to use ffmpeg to convert xm file to mp3, I get the error message below: ['ffmpeg', '-i', 'E:\\\\dodo\\\\test.xm', 'E:\\\\dodo\\\\test.mp3'] ffmpeg version N-110138-gb4eca5cce2-20230402 Copyright (c) 2000-2023 the FFmpeg developers built with gcc 12.2.0 (crosstool-NG 1.25.0.152_89671bf) configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads (...)
20:09
How to automate ffmpeg to split and merge parts of video, and keep the audio in sync? - Tree Newest 'ffmpeg' Questions - Stack Overflow

I have a Python script that automates trimming a large video (2 hours) into smaller segments and then concatenating them without re-encoding, to keep the process fast. The script runs these ffmpeg commands: import subprocess # Extract chunks segments = [(0, 300), (300, 600), (600, 900)] # example segments in seconds for i, (start, length) in enumerate(segments): subprocess.run([ "ffmpeg", "-i", "input.mp4", "-ss", str(start), "-t", str(length), "-c", "copy", "-reset_timestamps", "1", "-y", f"chunk_i.mp4" ], check=True) # Create concat (...)
19:52
Issues with Video Recording Duration and Smooth Playback when Using v4l2 to MP4 (FFmpeg) - Reena Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to record a video from a USB device with v4l2 framework and save it in MP4 format using FFmpeg. My sample code successfully captures and saves the video, but I'm running into some issues: The recorded video duration is shorter than expected. For instance: When recording a 1-minute video at 1280x720, the output file only has 58 or 59 seconds. For 1920x1080, the duration is even more off — only about 28 or 30 seconds, instead of the expected 1 minute. Additionally, the video is not smooth. There are noticeable drops in frames and playback (...)
09:25
What does `-map data-re` option in FFMPEG do? - zardosht Newest 'ffmpeg' Questions - Stack Overflow

I am trying to extract and parse KLV data from a video stream. I found the following example in a Github repository. I am wondering what does the mapping option data-re do? $ ffmpeg -i Day\\ Flight.mpg -map data-re -codec copy -f data - I understand the rest of the command, and know that -map is used to choose streams from inputs. But what does data-re mean. I couldn't find any explanation for it (or similar mapping option or stream identifier) in the documentation, e.g. here and (...) -- Github repository, here, here
10:15
avcodec_decode_audio4 was deprecated, how can i Decode the audio frame of size avpkt->size from avpkt->data into frame - just like before Newest 'ffmpeg' Questions - Stack Overflow

avcodec_decode_audio4 was deprecated, how can i Decode the audio frame of size avpkt->size from avpkt->data into frame. I am now migrating ffmpeg from v2.5 to 4.1 in my project.

8 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:15
Audio out of sync after merging video chunks extracted with ffmpeg using -c copy and -reset_timestamps 1 [closed] - Tree Newest 'ffmpeg' Questions - Stack Overflow

I’m splitting a long video (around 2 hours) into smaller chunks using ffmpeg commands like: ffmpeg -i input.mp4 -ss START_SECOND -t LENGTH -c copy -reset_timestamps 1 -y chunk_X.mp4 Then, I’m concatenating the resulting chunks using a concat list file: ffmpeg -f concat -safe 0 -i list.txt -c copy -y merged_output.mp4 So the chunks always come from the same file, and have the same codec/size/bitrate. My goal is to avoid re-encoding the entire video to keep the process fast. However, I’m noticing that after the final merge, the audio in some parts of the merged (...)
20:07
react electron importing 'execa' Error: Can't resolve 'child_process' - Martin Newest 'ffmpeg' Questions - Stack Overflow

I have been dealing with this issue for a while, trying different stackoverflow solutions, AI advice, multiple re-writes, and I am still very puzzles by it. I have a react electron app, which works fine, but if I try to import the 'execa' module: import execa from 'execa'; I always get these error messages: [0] Failed to compile. [0] [0] Module not found: Error: Can't resolve 'child_process' in '/home/martin/Documents/projects/electron-ghactions/node_modules/cross-spawn' [0] ERROR in (...) -- https://github.com/MartinBarker/electron-ghactions/blob/e76d643302cdc8601c11877eff8b43f2d5977c65/src/Ffmpeg.js#L3, https://github.com/MartinBarker/RenderTune/blob/59450b3f8445731e419c99335e7ebf7dbca6cbdf/src/FFmpeg.js#L4C1-L4C39
17:47
How to scroll and zoom an image at the same in ffmpeg? - neeebzz Newest 'ffmpeg' Questions - Stack Overflow

I have an image of the height 1200px. I want to create a video from this single image. My final video will be height 450px. At 0seconds I want to show a 2xZoomed version of the image. Then it in 2 seconds it should zoom out to it's original width. And then it start scrolling to the bottom and then at the end it starts scrolling back. This should be on loop until the end of the video. Also I am want the this whole image to be faded to 50% since I will overlay another video on top of it. I am trying to use the zoompan filter but it seems to be not working. (...)
15:38
Use Java FFmpeg wrapper, or simply use Java runtime to execute FFmpeg? - Beier Newest 'ffmpeg' Questions - Stack Overflow

I'm pretty new to Java, and need to write a program that listens to video conversion instructions and convert the video once a new instruction arrives (instructions are stored in Amazon SQS, but it's irrelevant to my question). I'm facing a choice, either use Java runtime to exec FFmpeg conversion (like from command line), or I can use an FFmpeg wrapper written in Java. http://fmj-sf.net/ffmpeg-java/getting_started.php I'd much prefer using Java runtime to exec FFmpeg directly, and avoid using java-ffmpeg wrapper as I have to learn the library. So (...) -- http://fmj-sf.net/ffmpeg-java/getting_started.php
15:26
Which decoder does ffmpeg actually use? [closed] - LTR Newest 'ffmpeg' Questions - Stack Overflow

How can I get ffmpeg to show exactly which decoder it uses? Example 1 In this example, I request Intel QuickSync decoding. However, QuickSync is not available because it's running on an AMD CPU. ffmpeg seems to fall back to CPU decoding, but doesn't say anything about that: > ffmpeg -hwaccel qsv -i "file.mp4" -f null - ... (nothing in the output refers to choice of decoder) Example 2 In this example, we request "auto" hardware acceleration. > ffmpeg -hwaccel auto -i "file.mp4" -f null - ... [h264 ⓐ 000001ed37d7a040] Using auto (...)
01:17
ffmpeg piped output producing incorrect metadata frame count - Xorgon Newest 'ffmpeg' Questions - Stack Overflow

The short version: Using piped output from ffmpeg produces a file with incorrect metadata. ffmpeg -y -i .\\test_mp4.mp4 -f avi -c:v libx264 - > output.avi to make an AVI file using the pipe output. ffprobe -v error -count_frames -show_entries stream=duration,nb_read_frames,r_frame_rate .\\output.avi The output will show that the metadata does not match the actual frames contained in the video. Details below. Using Python, I am attempting to use ffmpeg to compress videos and put them in a PowerPoint. This works great, however, the video files themselves have (...) -- here

7 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

01:38
Restart environment and script during batch script - ninbura Newest 'ffmpeg' Questions - Stack Overflow

I've built a few FFmpeg powershell scripts for me and a few others to use and I'm attempting to make the setup and update process as easy as possible. The end goal is to be able to run 1 batch file that installs Chocolatey, FFmpeg, git, clones the github repo (for updates), and edits the Windows registry to add the actual FFmpeg powershell scripts / console programs to the Windows Explorer contextual menu. This way I just pass them the folder containing everything once and any time I change or add something to the project I can just tell them to run the batch file again, and (...)

6 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:16
How to combine The video and audio files in ffmpeg-python - Isaac Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to combine a video(with no sound) and its separate audio file I've tried ffmpeg ffmpeg -i video.mp4 -i audio.mp4 -c copy output.mp4 and it works fine. i'm trying to achieve the same output from ffmpeg-python but with no luck. Any help on how to do this?
23:49
ffmpeg piped output producing incorrect metadata frame count with Python - Xorgon Newest 'ffmpeg' Questions - Stack Overflow

Using Python, I am attempting to use ffmpeg to compress videos and put them in a PowerPoint. This works great, however, the video files themselves have incorrect frame counts which can cause issues when I read from those videos in other code. Edit for clarification: by "frame count" I mean the metadata frame count. The actual number of frames contained in the video is correct, but querying the metadata gives an incorrect frame count. Having eliminated the PowerPoint aspect of the code, I've narrowed this down to the following minimal reproducing example of saving an output (...) -- here
16:52
Streaming mp3 using node http to Icecast server gives no output - Roboroads Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to stream a custom mp3 datastream to Icecast2. Icecast recognises there's a mountpoint, however the streamed data won't play and I have no idea why. import ffmpeg from 'fluent-ffmpeg'; import request from 'node:http'; const req = request( host: 'localhost', port: 8000, path: '/radio', method: 'PUT', auth: 'source:password', headers: 'Content-Type': 'audio/mpeg', Expect: '100-continue', (...)
11:13
"No accelerated colorspace conversion found from yuv420p to bgr24" when using OpenCV with FFMPEG on mac - Itay k Newest 'ffmpeg' Questions - Stack Overflow

When trying to acquire a frame from a video file (I've tried several video formats) I am getting an error message "No accelerated colorspace conversion found from yuv420p to bgr24". The exact same code ran perfectly fine on a windows machine and I couldn't get it to run on a mac even after I recompiled and installed FFMPEG and OpenCV. I am using lion for my OS. Any ideas?

5 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:01
Is there a way of making ffmpeg start with the largest folders first? [closed] - tuqueque Newest 'ffmpeg' Questions - Stack Overflow

I have the following script (snippet), where I search for all the folders and then pass the result to xargs, where I run ffmpeg in parallel for as many threads as my CPU has (32) to convert the image sequences inside each folder: find . -type d -print0 | xargs -0 -P32 -I ffmpeg... The thing is that there are folders with just 10 images inside and other folders with 150 images... I'd love if ffmpeg started with the largest folders first and then continue in a descending order... not one at a time, but keeping the parallel nature of the script. Is that even possible (...)
15:43
Using ffmpeg to create looping apng - Harry Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to create looping apng files from mkvs. My problem is that they don't loop. The files play once, but stop. This is what I'm doing: ffmpeg -ss 16:43 -i ./10.mkv -loop 10 -t 1 -filter:v "setpts=PTS-STARTPTS, crop=1200:800, hqdn3d=1.5:1.5:6:6, scale=600:400" 10-file-2.apng I've tried -loop -1 -loop 10 -loop 1 but there is no looping done. My version is ffmpeg-3.3.el_capitan.bottle.tar.gz
13:51
Which version of FFmpeg.AutoGen should I use? - Leo Pripos Marbun Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use FFMediaToolkit library which uses FFmpeg.AutoGen. And I encountered an error Invalid data found when processing input when calling ffmpeg.avformat_open_input this line. I tried run in windows & ubuntu using the latest version ffmpeg, it works fine. But when I run in Nvidia Jetson, it throws error. I tried to figure out the issue and MABYE it is because of the mismatch version of installed ffmpeg and FFmpeg.AutoGen. But somehow, I can't update the ffmpeg in jetson. Here the libraries inside (...) -- this line
13:51
Possible Memory leak in FFMPEGAutogen Example - Deadmeat Newest 'ffmpeg' Questions - Stack Overflow

I'm using the https://github.com/Ruslan-B/FFmpeg.AutoGen library to connect to an rtsp camera stream and save the frames as png images. Testing with the FFMPEG.Autogen's example project present in the GitHub repository with no changes I've noticed that the memory usage seems to constantly grow in infinitely. I've made sure to dispose of all bitmaps, pointers etc after use but am unable to pinpoint the source of the issue. It seems to be coming from their VideoStreamDecoder.TryDecodeNextFrame method as shown below: public bool TryDecodeNextFrame(out (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen, FFMPEG.Autogen's example project, VideoStreamDecoder.TryDecodeNextFrame
13:51
Ffmpeg possible sws_scale memory leak - Expressingx Newest 'ffmpeg' Questions - Stack Overflow

I'm decoding whatever the camera codec is and then always encode it to H264 and more specifically qsv if it is supported. Currently having 2 cameras to test. One is H264 encoding and one is rawvideo. The problem comes with rawvideo. The pixel format is BGR24 and scaling to NV12 I will simplify the code because it is as any other example. avcodec_send_packet() // while avcodec_receive_frame() // if frame is not EAGAIN convert BGR24 to NV12 if (_pConvertContext == null) _pConvertContext = CreateContext(sourcePixFmt, (...)
13:50
Why do I catch the "AccessViolationException" exception in av_hwframe_transfer_data () when I run it as a windows service? - vakym Newest 'ffmpeg' Questions - Stack Overflow

I write Windows service witch decodig video stream from camera. I write it on c# with FFMPEG.Autogen wrapper. My problem is "AccessViolationException" when i run it as service. If i run application as Console Application i have no exceptions. In Stacktrace i see this: в FFmpeg.AutoGen.ffmpeg+<>c.<.cctor>b__5_572(FFmpeg.AutoGen.AVFrame*, FFmpeg.AutoGen.AVFrame*, Int32) в FFmpeg.AutoGen.ffmpeg.av_hwframe_transfer_data(FFmpeg.AutoGen.AVFrame*, FFmpeg.AutoGen.AVFrame*,Int32) в (...)
13:50
How to decode MP4 file use GPU use ffmpeg.autogen? - wang ning Newest 'ffmpeg' Questions - Stack Overflow

How to decode MP4 file use GPU? I use the demo of FFmpeg.AutoGen. It is good for code: private static unsafe void DecodeAllFramesToImages() But this is use CPU to decode. I want get a demo use GPU to decode. How can i do this ? This is FFmpeg.AutoGen demo: private static unsafe void DecodeAllFramesToImages() // decode all frames from url, please not it might local resorce, e.g. string url = "../../sample_mpeg4.mp4"; var url = (...)
13:42
How to use CUDA to decode video in FFmpeg.AutoGen? - JongSeong Kim Newest 'ffmpeg' Questions - Stack Overflow

FFmpeg.AutoGen version: 7.0 Following is similar with Program.cs in "FFmpeg.AutoGen.Example" directory. var sourceSize = vsd.FrameSize; var sourcePixelFormat = AVPixelFormat.AV_PIX_FMT_CUDA; var destinationSize = sourceSize; var destinationPixelFormat = AVPixelFormat.AV_PIX_FMT_BGRA; VideoFrameConverter vfc = new VideoFrameConverter(sourceSize, sourcePixelFormat, destinationSize, destinationPixelFormat); However, when 'ffmpeg.sws_getContext' is called, ffmpeg shows below error message. ffmpeg error message: [swscaler ⓐ 000001b7af30aa00] (...)
13:53
Decode multiple video on GPU (FFmpeg.autogen + C#) - Sang Nguyen Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use the basic example about decoding video (FFmpeg.AutoGen.Example) in the FFmpeg.autogen 4.3.0.3 library https://github.com/Ruslan-B/FFmpeg.AutoGen to decode multiple videos on a GPU (AMD radeon R7 430). My main function is as follows: private static void Main(string[] args) var url = ⓐ".\\abc.mp4"; for (int i = 0; i < 11; i++) url = ⓐ"D:\\video\\abc" + i + ".mp4"; new Thread(() => DecodeAllFramesToImages(AVHWDeviceType.AV_HWDEVICE_TYPE_D3D11VA, url); ).Start(); I try to (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen, enter image description here, enter image description here
14:07
Using FFmpeg AutoGen save to bitmap works on Windows but not on Linux - Chris Newest 'ffmpeg' Questions - Stack Overflow

I'm using FFmpeg.AutoGen to decrypt video and save the frames as bitmaps. Code is using dotnet core and I'd like to get it working for both Windows and Linux. The code is similar to the example provided: https://github.com/Ruslan-B/FFmpeg.AutoGen/blob/db9bcd4b9dfad5d117ffd71fe1a2d073e96a3520/FFmpeg.AutoGen.Example/Program.cs AVFrame convertedFrame = this.converter.Convert(frame); Bitmap image = new Bitmap(convertedFrame.width, convertedFrame.height, convertedFrame.linesize[0], PixelFormat.Format24bppRgb, (IntPtr)convertedFrame.data[0]); When saving the (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen/blob/db9bcd4b9dfad5d117ffd71fe1a2d073e96a3520/FFmpeg.AutoGen.Example/Program.cs
14:06
Is there another way to export a frame in ffmpeg to a texture2d? My code working in Windows but not Linux - Robert Russell Newest 'ffmpeg' Questions - Stack Overflow

Sound is working in Linux the same as it did in Windows. But the video is just a black screen and when I attempt to save the frames as BMP files all of them were corrupt/empty files. I am using Ffmpeg.Autogen to interface with the libraries. https://github.com/Ruslan-B/FFmpeg.AutoGen. The file is VP8 and OGG in a MKV container. Though the extension is AVI for some reason. I tried messing with the order of the code a bit. I checked to make sure the build of Ffmpeg on Linux had VP8. I was searching online but was having trouble finding another way to do what I am doing. This is to (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen, https://github.com/Sebanisu/OpenVIII
14:05
Kernel32 not found when using FFmpeg.Autogen 4.1.0.2 in Mono/Linux - Robert Russell Newest 'ffmpeg' Questions - Stack Overflow

I'm submitting a bug report while I was posting this I didn't know I could see into FFmpeg.Autogen from the stacktrace. Anyways I posted a Bug Report on Github https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/109 I'm trying to run my code in Linux that uses FFmpeg.Autogen to interface with the ffmpeg libraries. I am getting kernel32 dll not found can not figure out why. He says to not post issues to github for troubleshooting. Possible related issue: https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/89 First thing I've tried were to (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/109, https://github.com/Ruslan-B/FFmpeg.AutoGen/issues/89
14:05
Extract audio from video using autogen ffmpeg C# in Unity - Johan Sophie Newest 'ffmpeg' Questions - Stack Overflow

Hi I'm using ffmpeg autogen to extract audio from video in Unity, but when I following this code, the file write cannot write, it's 0Kb, so what's issue of this or someone have any examples for extract audio using this library, apologize for my English. This is github of library: https://github.com/Ruslan-B/FFmpeg.AutoGen unsafe void TestExtractAudio() string inFile = Application.streamingAssetsPath + "/" + strFileName; string outFile = Application.streamingAssetsPath + "/" + strFileNameAudio; AVOutputFormat* (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen
13:55
FFMPEG.Autogen rtsp video is frequently broken - DK kim Newest 'ffmpeg' Questions - Stack Overflow

I developed an RTSP player with FFMPEG.Autogen in C#. I want to decode the stream and send it to a bitmap to display a picture box without encoding it. RTSP video plays fine. However, my videos often break. Sometimes the image turns gray and then comes back, or the screen appears as if some part is broken and blurred. I confirmed that the frame was coming in properly, but there are several hypotheses as to whether it is a problem with the decoded data or because it is run asynchronously, but I do not know the detailed reason. Please help me. this is my (...)
13:54
System.AccessViolationException on avcodec_open2 using FFMpeg.AutoGen - forlayo Newest 'ffmpeg' Questions - Stack Overflow

I am using FFMpeg.AutoGen (v6.0.0.2) with hwencode support for Nvidia cards, and in few devices (for example on NVIDIA GeForce MX350) when I am doing fffmpeg.avcodec_open2 I got the following ffmpeg message in logs: [h264_nvenc ⓐ 000001f473fcc480] OpenEncodeSessionEx failed: unsupported device (2): (no details) And then it crashes with the following crash: Fatal error. System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at (...) -- a sample app, nvenc_open_session, s called here, fail2 routine, in same method, here, nvenc_print_error, nvenc_check_device -> nvenc_setup_device
13:54
How to handle FFmpeg hardware decoder initialisation failure - Bernie Newest 'ffmpeg' Questions - Stack Overflow

I'm using the FFmpeg.AutoGen library in my project and found a crash on a video using hardware decoding. So I went back to the example and tested it there and found the same result. The example reports the following Current directory: D:\\...\\Ruslan-B\\FFmpeg.AutoGen\\FFmpeg.AutoGen.Example\\bin\\Debug\\net6.0 Running in 64-bit mode. FFmpeg binaries found in: D:\\...\\Ruslan-B\\FFmpeg.AutoGen\\FFmpeg\\bin\\x64 FFmpeg version info: 5.0-full_build-www.gyan.dev Use hardware acceleration for decoding?[n] y Select hardware decoder: 1. (...) -- video, example
14:08
AVFrame with NV12 format breaks using D3D11 HW acceleration - faith0058 Newest 'ffmpeg' Questions - Stack Overflow

I have a ffmpeg-autogen video decoder, im trying to use a D3D11 as HW accelerator, but the frame i get in result(with NV12 format) is broken. If im doing the same with Vulkan as accelerator, everything works fine, but vulkan uses more graphic card resources.. For rendering i use OpenTK, received frames i convert to RGB with textures and shaders. Below my decoder initialization. public VideoStreamDecoder(AVCodecParameters* parameters, AVCodec* codec) AVCodec* _codec = codec; _pCodecContext = ffmpeg.avcodec_alloc_context3(_codec); (...) -- normally working, broken, image, everything
14:07
How to encode from image to mp4 file use GPU? - user24185484 Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to convert images folder to mp4 via FFmpeg AutoGen https://github.com/Ruslan-B/FFmpeg.AutoGen. I use the demo of FFmpeg.AutoGen.Example It is good for me but this is use CPU to encode.This is FFmpeg.AutoGen demo: private static unsafe void EncodeImagesToH264() var frameFiles = Directory.GetFiles("./frames", "frame.*.jpg").OrderBy(x => x).ToArray(); using var fistFrameImage = ReadFrame(frameFiles.First()); var outputFileName = "frames/out.h264"; var fps = 25; var sourceSize = new Size(fistFrameImage.Width, (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen
06:09
How To covert mp4 video to m3u8 in ffmpeg using nodejs - VINAYKUMAR DAIVAJNA Newest 'ffmpeg' Questions - Stack Overflow

I am able to change the resolution of the video but I am getting error while trying to convert it to m3u8 format.
01:06
very low latency streaminig with ffmpeg using a webcam - userDtrm Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to configure ffmpeg to do a real-time video streaming using a webcam. The ffmpeg encoder command I use is as follows. ffmpeg -f v4l2 -input_format yuyv422 -s 640x480 -i /dev/video0 -c:v libx264 -profile:v baseline -trellis 0 -subq 1 -level 32 -preset superfast -tune zerolatency -me_method epzs -crf 30 -threads 0 -bufsize 1 -refs 4 -coder 0 -b_strategy 0 -bf 0 -sc_threshold 0 -x264-params vbv-maxrate=2000:slice-max-size=1500:keyint=30:min-keyint=10: -pix_fmt yuv420p -an -f mpegts udp://192.168.1.8:5001 The ffplay command used to display the video (...)

4 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

16:15
How can I make an rtsp stream as correct as possible in a Django application? [closed] - user25336067 Newest 'ffmpeg' Questions - Stack Overflow

I am writing a mini video surveillance system on Django. I want the stream to be output to the tag. now I have output to the img tag using a stream and jpeg images (using OpenCV)how to make a stream from a video, you may need to use WebRTC for the stream and somehow decode the video using ffmpeg, please tell me def generate_frames(rtsp_url): cap = cv2.VideoCapture(rtsp_url) # Замените на ваш RTSP URL while True: success, frame = cap.read() if not success: break # Кодируем кадр в JPEG ret, buffer = cv2.imencode('.jpeg', frame) frame = (...)
21:09
Command-line streaming webcam with audio from Ubuntu server in WebM format - mjtb Newest 'ffmpeg' Questions - Stack Overflow

I am trying to stream video and audio from my webcam connected to my headless Ubuntu server (running Maverick 10.10). I want to be able to stream in WebM format (VP8 video + OGG). Bandwidth is limited, and so the stream must be below 1Mbps. I have tried using FFmpeg. I am able to record WebM video from the webcam with the following: ffmpeg -s 640x360 \\ -f video4linux2 -i /dev/video0 -isync -vcodec libvpx -vb 768000 -r 10 -vsync 1 \\ -f alsa -ac 1 -i hw:1,0 -acodec libvorbis -ab 32000 -ar 11025 \\ -f webm /var/www/telemed/test.webm However (...)
21:13
How to make cropping when doing motion-tracking look super smooth? (using cv2 and yolo v8) - Thomas Lancer Newest 'ffmpeg' Questions - Stack Overflow

I'm using yolo to track a face in a video on a frame by frame basis, and then I'm using cv2 to crop the video (with some padding) around the speakers face so it creates a motion tracking type effect. (short example here: https://www.instagram.com/reel/DCIFkFEObkE/?hl=en) The problem I'm running into is my final crop looks "shaky". Like it's flickering a bit. I think this is because every frame yolo is updating the coordinates, and so there's a slight change in x, y and because of that it creates this shakiness/flickering effect. Here's what mine looks (...) -- https://www.instagram.com/reel/DCIFkFEObkE/?hl=en, https://drive.google.com/file/d/1MKHWK-5EH5abSq6i32r71GWld76tN1GP/view?usp=sharing
16:01
How can I get all handles when I debug a MFC program with Visual Studio? - Goblet Machine Newest 'ffmpeg' Questions - Stack Overflow

I have a MFC program with FFMpeg to play video, but when I use the DirectX decoder, I found that every time I close the video, the handle count in Task Manager increases by 3 (sometimes the count decreases after a while, but overall it shows an upward trend). I tried using WinDbg to capture the handles, but apart from these handles being called by the NVIDIA driver, there was no useful information. So I think maybe I can get more information in Visual Studio. Can anyone give some (...)
12:46
FFMPEG AMF Hardware Acceleration on AMD Ryzen™ 7 7700 Server in Ubuntu 22.04 [closed] - LoNormaly Newest 'ffmpeg' Questions - Stack Overflow

I was trying to make ffmpeg available with AMF and have access to the AMF hardware acceleration (in ffmpeg -hwaccels) but failed. At first, the kernel that the server as Ubuntu 22.04 came with was 5.15 and after contacting support I was explained that I need to upgrade the kernel to have access to /dev/dri. So I upgraded to 6.8 and then I had access to /dev/dri and was able to use ffmpeg 7.1 with vaapi working. In AMD, they have their own hardware acceleration named AMF, that allows much better speed and quality of transcoding. I installed the AMD GPU drivers like (...) -- https://www.amd.com/en/support/download/linux-drivers.html
13:58
launch ffmpeg on Maui Android - lolveley Newest 'ffmpeg' Questions - Stack Overflow

I have an Maui app which is deployed on an Android tablet, a Samsung tab S9 FE. I have copied the ARM8 version of the ffmpeg executable in the AppDataDirectory of my deployed app. The executable, named "ffmpeg", has the rights _rwxrwxrwx (the underscore means this is a file, and not a directory). I try to execute the file with the command Process.Start: private void GetThumbnail(string inputFile, string imageFullPath, string ffmpegFullPath) ProcessStartInfo startInfo = new ProcessStartInfo(); string arguments = $"-i inputFile -ss 00:01:00.000 -vframes 1 (...)
08:08
Adding soft dvdsub subtitle track (idx+sub) to mp4 video using ffmpeg [closed] - Tom Solid Newest 'ffmpeg' Questions - Stack Overflow

I have an .mp4 video and a dvdsub subtitle in to files (.idx and .sub). When I play the video (with VLC media player) the subtitles are displayed correctly, but I have tried to repack the video and the subtitles into one .mp4 file with ffmpeg: ffmpeg -i input.mp4 -f vobsub -sub_name input.sub -i input.idx -map 0:v:0 -map 0:a:0 -map 1:s:0 -codec:v copy -c:a copy -scodec dvdsub output.mp4 the subtitles are not displayed. According to VLC, there is a subtitle track in output.mp4, but I cant see any subtitles during the play. Additional information that the video size (...)
10:03
How to optimize recording feature with mediasoup? - hu7sy Newest 'ffmpeg' Questions - Stack Overflow

I am using Mediasoup for video conference call and now i have add ffmpeg for recording feature. Ffmpeg code below get _commandArgs() let commandArgs = [ '-loglevel', 'debug', '-report', '-protocol_whitelist', 'file,pipe,udp,rtp', '-fflags', '+genpts', '-flags', 'low_delay', '-f', 'sdp', '-i', 'pipe:0', '-rtbufsize', '256M', '-muxdelay', '2.0', (...)
04:15
how to fix Non-monotonous DTS in output stream 0:1; when using ffmpeg [closed] - xiao xin Newest 'ffmpeg' Questions - Stack Overflow

When I use ffmpeg to convert m3u8 to mp4, I get some warning, ffmpeg -i xx.m3u8 -c copy demo.mp4 warning is Non-monotonous DTS in output stream 0:1; previous: 3277744, current: 3276712; changing to 3277745. This may result in incorrect timestamps in the output file. Non-monotonous DTS in output stream 0:1; previous: 3277745, current: 3277736; changing to 3277746. This may result in incorrect timestamps in the output file. what should I do to fix (...)

3 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

11:40
How to Make FFmpeg Duplicate the Last Frame When No New Frames Are Received? [closed] - David Asulin Newest 'ffmpeg' Questions - Stack Overflow

I’m trying to record video input from a pipe that only streams new frames if there is a change in the video source. I want FFmpeg to duplicate the last frame in case no new frame is received. The command I use is: nc localhost 9000 | ffmpeg -i pipe: -framerate 25 -fps_mode cfr output.mp4 Running the above command only records a few seconds. How can I make FFmpeg record continuously and duplicate the last frame when no new frame is received?
21:19
Failed to find two consecutive MPEG audio frames [closed] - matrixebiz Newest 'ffmpeg' Questions - Stack Overflow

I'm receiving this error trying to download/convert an m3u8 [mp3 ⓐ 000001c8f5112200] Format mp3 detected only with low score of 1, misdetection possible! [mp3 ⓐ 000001c8f5112200] Failed to find two consecutive MPEG audio frames. [in#0 ⓐ 000001c8f5111f40] Error opening input: Invalid data found when processing input Any way to fix this in my ffmpeg command line? Also, playing the stream in VLC and other apps shows this in the path /%EF%BB%BF for some reason. VLC is unable to open the MRL 'file:///C:/Temp/%EF%BB%BF'. Check the log for details. Then (...)
16:38
FFmpeg problems: encode/normalize then concat multiples videos - BDR Newest 'ffmpeg' Questions - Stack Overflow

I want to: encode a lot of videos to add text concat them into one final video (preferably without re-encoding) I need the operations to be done in distinct 2 steps. I read a lot of posts but don't manage to find the correct solution. The videos comes from different source, and so have different encoding settings. To encode the videos I use the following command: ffmpeg -i input.1.mp4 -vcodec libx264 -acodec aac -pix_fmt yuv420p-vf scale=1920:-2, drawtext=fontfile=./roboto.ttf: fontsize=40: text='ABC': x=(w-text_w)-w/20: (...)
16:13
How to interact with process output? - 1ben99 Newest 'ffmpeg' Questions - Stack Overflow

Ok so at the moment I have a program which runs FFmpeg using a process in VB.net. I send the process arguments in the startinfo as well as other things like the file location. When I run the code it sends the console output to the debug console; this is probably because I have the .UseShellExecute = False and processInfo.RedirectStandardOutput = True My question is: How do I make something which can interpret the output? Also with FFmpeg, the process is continuous so the process is always running for the most part and constantly adding more output lines in the debug (...)
10:39
Capturing actual video stream quality using FFmpeg and FFplay – smooth recording but stuttering stream - Karlitos Bemowo Newest 'ffmpeg' Questions - Stack Overflow

I’m trying to analyze the quality of a video stream over a local network using FFmpeg. My goal is to capture the actual streamed video (with all artifacts, stuttering, or buffering) as experienced in real-time, rather than a reconstructed, smooth output. Currently, the recorded video is perfectly smooth, but the live stream played using ffplay exhibits noticeable stuttering. Additionally, while the duration of the recording matches the original video, the live stream lasts longer, likely due to buffering caused by network instability. Here are the commands I’m (...)
07:25
How to accquire the real size(rendering size) of a video through ffmpeg - Lin Xing Newest 'ffmpeg' Questions - Stack Overflow

Here is the video video, when i use the ffmpeg command line tool to read it's basic information(via: ffmpeg -i xxx.mp4), i get the size "720x1080", but when i open this video through chrome or VLC, i got the size "720x1271". why the rendering size is 720x1271? chrome browser: enter image description here ffmpeg -i: enter image description here When i extract the h264 format data out of this video, i still get the size of height 1080. But when you play it with chrome browser or VLC, it's height is 1271, It confuse (...) -- video, enter image description here, enter image description here
08:37
How to make WebM screen recording chunks independently processable for audio with FFmpeg? - Dinesh Kumar Newest 'ffmpeg' Questions - Stack Overflow

I am streaming screen recordings from the browser into 5-second WebM chunks using the MediaRecorder API. The first chunk (root chunk) is independently processable because it contains the necessary EBML headers and metadata. However, subsequent chunks are not independently processable, as they lack the required metadata, which prevents me from extracting audio independently from them. I am unable to extract audio independently from the individual chunks using FFmpeg due to missing headers, resulting in errors like EBML header parsing failed. The first chunk works fine on its own, but (...)
01:13
How do I get drawtext filter in ffmpeg to work on ubuntu 22.04? - chovy Newest 'ffmpeg' Questions - Stack Overflow

Here's my script, but no matter what I try the drawtext filter is not enabled: #!/bin/bash set -e # Exit on any error # Define installation directories INSTALL_DIR="$HOME/ffmpeg_build" BIN_DIR="$HOME/bin" SOURCE_DIR="$HOME/ffmpeg_sources" NUM_CORES=$(nproc) echo "Creating necessary directories..." mkdir -p "$INSTALL_DIR" "$BIN_DIR" "$SOURCE_DIR" # Install required tools and dependencies echo "Installing build tools and essential libraries..." sudo apt-get update sudo apt-get install -y \\ autoconf automake (...)
01:32
Issue with FFmpegKit in React Native: "Cannot read property 'ffmpegSession' of null" - ragav ravi Newest 'ffmpeg' Questions - Stack Overflow

I am new to React Native and Expo, and I’m trying to upload a video using expo-image-picker, then pass its URI to FFmpegKit (ffmpeg-kit-react-native) to extract frames from the video. Here’s what I’ve done so far: I’m using expo-image-picker to upload the video and retrieve its URI. I use FileSystem.documentDirectory to get the local file path from the URI and then pass this path to the FFmpegKit command. However, I’m encountering the following error: Cannot read property 'ffmpegSession' of null I’ve tried calling FFmpegKitConfig.init() before (...) --

2 décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:38
Fade in image on existing video [closed] - csphmay Newest 'ffmpeg' Questions - Stack Overflow

I'm currently trying to create a video which has a background image and a mp3 set for background audio and now I want to achieve to add a second image which fades in over 5 seconds. The result should be a video where the background image is shown and the second image is laying over it (The second image is basically a logo which I would like to place in the bottom right corner). To this point I wasn't able to achieve the result described above with a single FFMPEG command. With the following two commands I generate the video with the first background image and with the (...)
21:12
Applying audio to video background using ffmpeg_kit_flutter package not working in flutter - MhmD Yo Newest 'ffmpeg' Questions - Stack Overflow

I am trying to merge video and audio and downloading the video in a flutter app using ffmpeg_kit_flutter package, it works fine with the videos that recorded by screen recorder app which records the screen of my phone, but it does not works with the videos that recorded by my phone camera or any video else and I do not know where the problem is. Here's my code: Future mergeRecordWithIntro(required String videoPath, required String audiPath, ) async final random = Random(); final directory = await getTemporaryDirectory(); String outputVideoPath (...)
17:44
Python code to download hls stream to mp4 - Maad A.Galil Newest 'ffmpeg' Questions - Stack Overflow

I wrote the following code to download a video from a website. Chrome extensions can detect the video and download it. However, my code gets the following errors. Any help? from bs4 import BeautifulSoup import requests from subprocess import check_output video_url = 'https://www.dimakids.com/ab6al-aldigetal-s3-1415387355-21011.html#sets' headers = 'User-Agent': 'Mozilla/5.0' url = requests.get(video_url, headers=headers) page = url.content soup = BeautifulSoup(page, "html.parser") result = (...) -- https://www.dimakids.com/ab6al-aldigetal-s3-1415387355-21011.html#sets, https://www.dimakids.com/images/anime/cat_1415387355.jpg, https://stream.foupix.com/animeios/1415387355/ab6al_aldigetal_s3_01.mp4/index.m3u8?tkn=6nyEskSbHBI713sG0uhZJQ&tms=1733171604
09:58
JavaCV FFmpegFrameRecorder save images to video - Learning from masters Newest 'ffmpeg' Questions - Stack Overflow

I am a bit confused about the use of JavaCV FFmpegFrameRecorder. I have several byte[] or short[] arrays (depending if my images are 8 or 16 bit) were I have the data related for several images. Now, my idea is to use JavaCPP to send each image to ffmpeg so it creates me a mute video from this collection at the framerate I wish. Up to now I have: package ffmpeg; import java.awt.EventQueue; import java.io.File; import java.nio.Buffer; import java.nio.ByteBuffer; import javax.swing.JFrame; public class rwa private JFrame (...)
07:51
merge webm files without headers [closed] - Shiva Kumar Newest 'ffmpeg' Questions - Stack Overflow

I have a list of video chunks of a video. first chunk is only playable and the rest are not because they are missing the header information. I want to merge them into a single playable video. tried ffmpeg commands ffmpeg -i chunk1.webm -i chunk2.webm -i chunk3.webm -filter_complex "[0:v][0:a][1:v][1:a][2:v][2:a]concat=n=3:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" output.webm [matroska,webm ⓐ 0x55c5fc62ffc0] Format matroska,webm detected only with low score of 1, misdetection possible! [matroska,webm ⓐ 0x55c5fc62ffc0] EBML header parsing failed chunk2.webm: Invalid data (...)
05:49
FFMPEG - RUST - Setting flags not working [closed] - Varun Deep Saini Newest 'ffmpeg' Questions - Stack Overflow

I am using rtp to copy streams to a mp4 files but i am getting this error [rtp ⓐ 0x15bf04f80] Protocol 'rtp' not on whitelist 'file,crypto,data'! I am using the ffmpeg-rust "7.1.0" crate in rust How do i add this flag Tried the av_dict_set() but could not get it to work
05:34
Is celery a good choice for long running tasks? - jasoos Newest 'ffmpeg' Questions - Stack Overflow

We are using a combination of django, rabbitmq, celery and ffmpeg to read camera streams and break them into images to be stored into filesystem. This setup works 24x7. Now, for each camera stream we are creating a separate task and each will theoretically run for indefinite period. If a stream goes down, we wait for n number of frames, create an exception and in the exception handler, after creating a delay of 1 min using time.sleep we rerun the ffmpeg process. My questions are, Is this a right approach? Should we use celery for reading streams? Is celery the right (...)

1er décembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

20:34
How to get the format of nvdec video frame from ffmpeg decoding ? How to use it in cuda structures? - Soleil Newest 'ffmpeg' Questions - Stack Overflow

I am using code, almost exactly https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/hw_decode.c, but I am not transferring the decoded data to the host, I keep it on the device for later use with cuda code (my goal will be to use RGB 8-12 bits per channel data). The interesting part is: //after decoding/encoding status = avcodec_receive_frame(avctx, frame); if (status != AVERROR(EAGAIN) && status != AVERROR_EOF) LogMessage(L"frame timestamp: %i\\n", (int)frame->best_effort_timestamp); if (status == AVERROR(EAGAIN) || status == AVERROR_EOF) (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/hw_decode.c
09:30
I cannot play a mp3 file on Discord's voice channel using discord.py - ra1ned Newest 'ffmpeg' Questions - Stack Overflow

I am creating a discord bot that plays lofi for me. It does not play a song for me even though it shows a green indicator on a voice channel. Here's what I've written: if message.content == "!join": await message.author.voice.channel.connect() await message.channel.send("Successfully connected") if message.content == "!play": if message.guild.voice_client is None: await message.channel.send("use !join") return await message.channel.send("playing a song rn") print('*** playing a song rn') (...)

30 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

16:17
Concatenate multiple .ts files into single mp4 without ffmpeg usage - urFate Newest 'ffmpeg' Questions - Stack Overflow

How to concatenate multiple .ts files into single mp4 without ffmpeg usage on Java (Android/Kotlin)? FFMpeg it's huge library in terms of size for android applications itself and I'm sure there is a way to concatenate ts's without that library. How to solve this on Java? If simply concatenate files via byte-to-byte way in result we will get playable, but not seekable .mp4 file.
09:21
Turn an FFmpeg command into an FFmpeg wasm exec function - SeriousLee Newest 'ffmpeg' Questions - Stack Overflow

I have this gnarly FFmpeg command: ffmpeg -i music.mp3 -i video.mp4 -i speech.mp3 -filter_complex "[0:a]atrim=0:$(ffprobe -i speech.mp3 -show_entries format=duration -v quiet -of csv=p=0),volume=0.08[trimmed_music]; [2:a]volume=2[speech]; [1:v]loop=-1,trim=duration=$(ffprobe -i speech.mp3 -show_entries format=duration -v quiet -of csv=p=0),setdar=9/16[vout]; [trimmed_music][speech]amix=inputs=2:duration=first[aout]" -map "[vout]" -map "[aout]" -c:v libx264 -crf 23 -preset medium -c:a aac -b:a 192k final_output.mp4 What it does is: Get the duration of a speech.mp3 (...)

29 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

15:09
ffmpeg -i desktop Output file does not contain any stream [closed] - Antonio Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to screen record a remote Windows VM machine which I'm accessing through ssh. I'm executing this command ffmpeg -f gdigrab -framerate 30 -i desktop -t 00:00:10 output.mp4 which is returning the following error: ffmpeg version 7.1-essentials_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers built with gcc 14.2.0 (Rev1, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --en able-iconv --enable-gnutls --enable-libxml2 --enable-gmp (...)
23:31
Converting HLS Stream to stream supported by old radio - Alberto Faenza Newest 'ffmpeg' Questions - Stack Overflow

I have an old internet radio that does not support HLS streams. Therefore I cannot listen to my favourite radio at this url: https://streamcdnf31-4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/master_ma.m3u8 I found a solution using a paid software https://minimradio.com/ which is based on minimserver and minimstreamer. This solution works if I install mininmserver and minimstreamer on a local computer and use the internet radio to point to the converter stream but I will have to pay if I want to use this. Checking the documentation of minimradio (...) -- https://streamcdnf31-4c4b867c89244861ac216426883d1ad0.msvdn.net/radiodeejay/radiodeejay/master_ma.m3u8, https://minimradio.com/, http://192.168.1.9:10000
17:04
Python Discord Music Bot: Playing next song while current song is playing - Deltrac Newest 'ffmpeg' Questions - Stack Overflow

I've been working on a discord bot for me and my friends and I got it working 90% of the time. I noticed that, on some occasions the bot will be playing a song and it will stop playing the song and just move to the next song. I'm not sure what is causing this directly, but my assumption is that it's because of how I am handling my "play" command and the "play_next" command as well. I've tried basically everything that I could think of (re-arrange the code, change functionality, etc.). I am not too skilled at Python so my expertise is limited in this field (...)
06:20
node.js fluent-ffmepg with createWriteStream fails - Node.JS Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use fluent-ffmpeg node package with createReadStream and createWriteStream. However, if I replace this line: .output(fs.createWriteStream('assets/transcode-video.mp4'), end: true) I write this .output('assets/transcode-video.mp4', end: true) it works. But I literally followed the documentation. I appreciate any help or hint. const fs = require('fs'); const ffmpeg = require("fluent-ffmpeg"); const logger = console; const options = timeout: 60, // seconds (...) -- documentation, My repository for complete code
05:37
Trying to get pixels from a transparent AVI file to use them in a Raylib image but AVFrame comes out - Kolt Penny Newest 'ffmpeg' Questions - Stack Overflow

I was trying to open a video file with FFmpeg's API using C++. So far all the steps up until calling av_read_frame has no errors: avformat_open_input, avformat_find_stream_info, avcodec_find_decoder, avcodec_alloc_context3 ,avcodec_parameters_to_context and avcodec_open2 pass the error checking. AVFrame* av_frame and AVPacket* av_packet are correctly allocated. This following code is where I do the rest of the checks, to get the pixel data: int bufferSize = av_codec_ctx->width * av_codec_ctx->height * 4; unsigned char* data = new unsigned (...)

28 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

14:33
LibAV cannot find hardware acceleration but ffmpeg does. compiled using vcpkg [closed] - CottonBuds Newest 'ffmpeg' Questions - Stack Overflow

I'm new to ffmpeg and I've been specifically using libav as a library for C++. I'm having troubles with libav not finding "qsv" as hardware acceleration even though I compiled ffmpeg with "qsv". ffmpeg.exe is working normally and can see "qsv" but not my program that uses libav libraries. I compiled it on Windows using vcpkg. Here are some screenshots Here ffmpeg.exe can see it when I run this code output: it cant see it Here is my CMakeLists.txt: cmake_minimum_required (VERSION 3.12) project (...) -- , ,
17:25
Icecast status page not showing Server Name, Server Description, Stream Name, or Stream Description - Daniel Torridon Newest 'ffmpeg' Questions - Stack Overflow

I have PHP streaming MP3 files listed in playlist.txt to Icecast using FFMpeg. $ffmpeg_command = "ffmpeg -re -f concat -safe 0 -stream_loop -1 -i /var/www/html/media/radio/playlist.txt -c:a libmp3lame -b:a 128k -f mp3 -ice_name \\"My Name\\" -ice_description \\"My Description\\" -metadata title=\\"My Title\\" -metadata artist=\\"My Artist\\" -metadata genre=\\"My Genre\\" -headers \\"Icy-MetaData: 1\\" icecast://source:Passwordⓐ99.99.99.99:8000/stream > /dev/null 2>&1 &"; The stream plays correctly, but the Admin and Public status pages for Icecast show the Server Name, Server (...)
10:51
discord.player ffmpeg process 12040 successfully terminated with return code of 1 - morichh Newest 'ffmpeg' Questions - Stack Overflow

code: ⓐclient.tree.command() async def play(interaction: Interaction, url: str): global voice channel = interaction.user.voice.channel voice = get(client.voice_clients, Guild=interaction.guild) if voice and voice.is_connected(): await voice.move_to(channel) await interaction.response.send_message(f"error") else: voice = await channel.connect() await interaction.response.send_message(f"joined") voice.play(discord.FFmpegPCMAudio(executable="C:/ffmpeg/bin/ffmpeg.exe", source = url)) error: 2022-12-10 19:32:48 INFO (...)
10:09
Discord bot not playing any audio and immediately terminates once joined channel (Python) - MrPwnageLegend Newest 'ffmpeg' Questions - Stack Overflow

I am trying to create a small discord bot for me and my friends. Currently, I tried several examples online for a music bot using ffmpeg. I added the path to environment variables as well. I simplified the code to make it easier to debug. Below is the code: voice_client = await msg.author.voice.channel.connect() print(voice_client.is_playing()) FFMPEG_OPTIONS = 'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5','options': '-vn' voice_client.play(discord.FFmpegPCMAudio(source="test.mp3", (...)
10:03
Using FFMPEG command to read the frame and show using the inshow function in opencv - HARSH BHATNAGAR Newest 'ffmpeg' Questions - Stack Overflow

I am trying to get the frame using the ffmpeg command and show using the opencv function cv2.imshow(). This snippet gives the black and white image on the RTSP Stream link . Output is given below link [ output of FFmpeg link]. I have tried the ffplay command but it gives the direct image . i am not able to access the frame or apply the image processing. Output of FFMPEG import cv2 import subprocess as sp command = [ 'C:/ffmpeg/ffmpeg.exe', '-i', 'rtsp://192.168.1.12/media/video2', '-f', 'image2pipe', (...) -- Output of FFMPEG

27 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

12:58
High quality screen capture using ffmpeg on wayland [closed] - Charlie Benger-Stevenson Newest 'ffmpeg' Questions - Stack Overflow

Running hyprland/wayland on arch. I want a reasonable quality (for say youtube) screen capture. ffmpeg -device /dev/dri/card1 -re -f kmsgrab -i - -vf 'hwmap=derive_device=vaapi,hwdownload,format=bgr0' -s 1920x1080 -c:v mpeg2video -b:v 1M -t 5 ~/Recordings/screencap.avi This should set a bitrate of 1M but the output is super blocky with a much lower bitrate than specified by the b:v flag. What am I doing wrong?
13:55
Cutting multimedia files based on start and end time using ffmpeg - Kalaiyarasan Newest 'ffmpeg' Questions - Stack Overflow

I tried to cut the video using the start and end time of the video by using the following command: ffmpeg -ss 00:00:03 -t 00:00:08 -i movie.mp4 -acodec copy -vcodec copy -async 1 cut.mp4 By using the above command I want to cut the video from 00:00:03 to 00:00:08. But it is not cutting the video between those times instead of that it is cutting the video with first 11 seconds.
08:09
Trying to get pixels from a transparent AVI file to use them in a Raylib image but AVFrame comes out empty - Kolt Penny Newest 'ffmpeg' Questions - Stack Overflow

I was trying to open a video file with FFmpeg's API using C++. So far all the steps up until calling av_read_frame has no errors: avformat_open_input, avformat_find_stream_info, avcodec_find_decoder, avcodec_alloc_context3 ,avcodec_parameters_to_context and avcodec_open2 pass the error checking. AVFrame* av_frame and AVPacket* av_packet are correctly allocated. This following code is where I do the rest of the checks, to get the pixel data: int bufferSize = av_frame->width * av_frame->height * 4; unsigned char* data = new unsigned (...) -- packet showing no data, but has size
04:04
How to write H264 raw stream into mp4 using ffmpeg directly - Yelsin Newest 'ffmpeg' Questions - Stack Overflow

I want to wrap the H264 Nalus(x264 encoded) into mp4 using ffmpeg(SDK 2.1), but the output mp4 file could not play. I don't know how to set the pts and dts. Here's my code, using the code from Raw H264 frames in mpegts container using libavcodec and muxing.c from www.ffmpeg.org. My H264 stream has no B-Frame, every nalu starts with 00 00 00 01,the stream begins with sps pps then the h264 data. #include "stdafx.h" #include #include #include "Stream2Mp4.h" #include #include #include #include #include #include (...)

26 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

04:11
How to Dynamically Control FFmpeg Encoding Bitrate Based on Current Network Bandwidth? [closed] - Stove Fire Newest 'ffmpeg' Questions - Stack Overflow

I’ve implemented a program using FFmpeg where the server encodes OpenGL render results and sends them to the client. The client then decodes the video and renders the result onto a texture using OpenGL. What I’m trying to achieve is to adjust the encoding bitrate dynamically based on the current network bandwidth — higher bandwidth results in higher bitrate encoding, and lower bandwidth results in lower bitrate encoding. I use libx264 encoder and rtsp. I found the iperf tool online, which is useful for measuring network bandwidth, but it is a command-line tool and does not have a (...)

25 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:36
How to send RTP stream to Janus from NGINX RTMP module? [closed] - Matéo Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to create a stream and display it in a browser. I have already configured NGINX with the rtmp module and my stream works very well with HLS (between 5 and 10 seconds of latency). Now I would like to set up a low-latency stream and that's why I have installed the janus-gateway webRTC server that allows to take in input an RTP stream and provide in output a webRTC stream. Here's the schema I'd like to follow : OBS -> RTMP -> Nginx-rtmp-module -> ffmpeg -> RTP -> Janus -> webRTC -> Browser But I have a problem with this part : (...)
10:35
Why did this bat script delete all my files? [closed] - YaBoyShredderson Newest 'ffmpeg' Questions - Stack Overflow

I don't know anything about .bat scripting, but my needs were pretty basic. Go through a folder and sort the videos into folders based on resolution. I have asked chatgpt to create these types of simple scripts for me before, but this time it went very wrong. In hindsight, I obviously should have tested it first, but it appears to have deleted almost all of my files. Why did this happen, and is it possible it moved them somewhere else, if so where? ⓐecho off :: Prompt user for the path set /p "folder=Enter the folder path: " :: Check if the folder exists if (...)
14:46
Replace silence in audio using ffmpeg.wasm - blueseal Newest 'ffmpeg' Questions - Stack Overflow

I have a use case where I have to shorten silences which are longer than 2 seconds and shrink them to 1 second in ffmpeg wasm I can remove silences which are longer than 2 seconds but couldn't shrink them. const silenceDuration = 2; await ffmpeg.run( "-i", inputFileName, "-af", `silenceremove=stop_periods=-1:stop_duration=$silenceDuration:stop_threshold=-30dB`, outputFileName, ) any idea how to achieve this in ffmpeg wasm? Thank (...) -- ffmpeg wasm
12:41
Read sample encrypted AAC with FFmpeg - rdrmntn Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to open a sample encrypted AAC file (packed audio) using FFmpeg APIs. I can open an unencrypted AAC file using AVFormatContext* iContext = nullptr; avformat_open_input(&iContext, mediaFileName.c_str(), nullptr, nullptr); I'm also able to open a sample encrypted fmp4 segment using AVDictionary *options = nullptr; av_dict_set(&options, "decryption_key", ssKey.str().c_str(), 0); AVFormatContext* iContext = nullptr; int ret = avformat_open_input(&iContext, mediaFileName.c_str(), nullptr, &options); But (...)
13:17
close the running application in vb.net from background - TOM Newest 'ffmpeg' Questions - Stack Overflow

i want to stop the running (ffmpeg) process from background . i use the process.kill() i wrote the code . but in this process the output file is getting corrupted. Dim pProcess() As Process = Process.GetProcesses For Each p As Process In pProcess If p.ProcessName = "ffmpeg" Then p.WaitForExit(1000) p.Kill() p.Close() End If Next is there any other method to terminate the process without file being corrupt (...)
02:51
Double speed playback with ffpmeg+nginx [closed] - chunjie yang Newest 'ffmpeg' Questions - Stack Overflow

I want to achieve 2x playback speed. There is a streaming service A, and I want to set up a streaming server B locally to obtain streams from A and play them at 2x speed. In order to achieve this function, first use the command to make server A push the stream at twice the speed. After the local server B removes the stream, use the following command to transcode and play it. However, it is found that the stream is too laggy. I don't know why. The command is as follows: Transcoding: ffmpeg -re -i 'http://ServerAPlaybackUrl' \\ -filter_complex (...)

24 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:40
FFmpeg loading tracker files - Atlas Sullivan Newest 'ffmpeg' Questions - Stack Overflow

So, after poking around a bit, I discovered that ffmpeg may have the ability to load tracker files (like *.mod, *.xm *.it *s3m et cetera) via the power of libopenmpt. The question is, how do I do this if it's possible? -- libopenmpt
20:23
How to convert an mp4 file to mp3 using FFMpegCore? - Simon Newest 'ffmpeg' Questions - Stack Overflow

How can I convert an mp4 video to mp3, using the nuget-package FFMpegCore in a C# Project (.NET 8)? public void ConvertViaFFMpegCore(string sourcePath, string targetPath) FFMpegArguments .FromFileInput(sourcePath) .OutputToFile(targetPath, false, options => options .WithVideoCodec(VideoCodec.???) // <- ??? .WithConstantRateFactor(21) .WithAudioCodec(AudioCodec.???) // <- ??? .WithVariableBitrate(4) .WithVideoFilters(filterOptions => filterOptions .Scale(VideoSize.Hd)) .WithFastStart()) (...) -- FFMpegCore
18:59
Using ffmpeg to obtain video durations in python - OSK Newest 'ffmpeg' Questions - Stack Overflow

I've installed ffprobe using the pip ffprobe command on my PC, and installed ffmpeg from here. However, I'm still having trouble running the code listed here. I try to use the following code unsuccessfully. SyntaxError: Non-ASCII character '\\xe2' in file GetVideoDurations.py on line 12, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details Does anyone know what's wrong? Am I not referencing the directories correctly? Do I need to make sure the .py and video files are in a specific location? import (...) -- here
19:12
ffmpeg.wasm - How to do literally anything with a blob url - SeriousLee Newest 'ffmpeg' Questions - Stack Overflow

I'm using the ffmpeg.wasm for the first time and I can't get anything working, beyond loading it. I have this function that does nothing in particular (I got it from the vite + react example in the docs, slightly modified) and all I want to do is pass it a blob URL like this blob:http://localhost:5173/c7a9ea7c-aa26-4f4f-9c80-11b8aef3e81f and run through the function and have it give me anything back. But instead, it hangs on the ffmpeg.exec command and never completes. And yes, I've determined that the input blob does work - it's an 8MB, 12-second long mp4 (...)
10:17
How to stream MacOS desktop screen over local IP using ffmpeg or python or objective-C or Swift? - Akella Niranjan Newest 'ffmpeg' Questions - Stack Overflow

I am trying to build a service/application/script on MacBook that can help me share my desktop screen [Mirror my screen] over a local IP address. Or I want to display it on a webpage using flask framework using python. I just wish to look at my desktop screen along with the mouse movements on a web-browser, just like a Remote Desktop. I did try the following command, but when I try to open my browser and go to the IP address it just shows a blank screen sudo ffmpeg -f avfoundation -framerate 30 -pix_fmt uyvy422 -i "0" -listen 1 -f mp4 -movflags (...)

23 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:11
ffmpeg - add music to an audiobook, and loop the music [closed] - Rhys Newest 'ffmpeg' Questions - Stack Overflow

I found these example, and they all work. But I cannot overlay 2 audios and loop the shortest audio until the longest audio is finished. Audio to match Video Length ffmpeg -i VIDEO1.mp4 -stream_loop -1 -i bgmusic.mp3 -shortest -c:v copy -c:a aac -map 0:v:0 -map 1:a:0 output.mp4 Loop Audio ffmpeg -i audio.mp3 -filter_complex "aloop=loop=-1:size=10" output_loop.mp3 Overlay 2 Audios ffmpeg -y -i bgmusic.mp3 -i audio.mp3 -filter_complex "[0:0]volume=1.0[a];[1:0]volume=1.0[b];[a][b]amix=inputs=2:duration=longest" -c:a libmp3lame output.mp3 Here is (...)
16:32
Multiple subtitle tracks on iOS with AVPlayer [closed] - Martin Paucot Newest 'ffmpeg' Questions - Stack Overflow

I have a bunch of videos that are hosted on Vimeo. To allow users watching them on the mobile apps (Android & iOS) we use the m3u8 format given directly by Vimeo. It works great with expo-video as all our videos have transcript for different languages. I would like to allow the users to download videos so they can be watched offline. To achieve that I use ffmpeg to convert the .mp4 to .mkv and combine the .srt files. This solution works great on android, users can download videos and watch them offline with the ability to select subtitles. Unfortunately it seems that (...) -- expo-video, ffmpeg
06:08
Generating a waveform using ffmpeg - krisph Newest 'ffmpeg' Questions - Stack Overflow

I am trying to generate a waveform image using ffmpeg. I have successfully made a waveform image, however it doesn't look very nice... I have been looking around to try and style the image to make it look nicer, however I have been unable to find any information on this or any tutorials on this. I am using PHP and shell_exec to create the waveform. I am aware that there are php library that can do this but due to file format this is a lengthy process. The code I am using is as follows: $command = 'convertvid\\bin\\ffmpeg (...)
06:45
Cannot capture system audio with ffmpeg on windows 11 [closed] - Snykral fa Ashama Newest 'ffmpeg' Questions - Stack Overflow

I am trying to capture audio on ffmpeg. However, I only found how to capture microphone audio, which is useless to me. ffmpeg -f gdigrab -framerate 30 -i desktop -f dshow -i audio="Microphone" -c:v libx264 -preset fast -c:a aac -b:a 192k vid.mp4 How can I record system audio on Windows 11?
04:14
FFMPEG Zoom pan to a particular coordinate x and y in a video - crysis Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to zoom-in in a video at a particular coordinatates x, y when video reaches at timestamp in duration. I'm using this command for the zoompan filter x = 784 y = 550 timestamp = 2 width = 1920 height = 1044 zoompan_filter = ( f"zoompan=z='if(between(in_time,timestamp,timestamp + 0.5)," f"1+2*(in_time-timestamp)," f"if(between(in_time,timestamp + 0.5,timestamp + 1)," f"2-2*(in_time-timestamp + 0.5),1))':" f"x='x-(iw/zoom/2)':y='y-(ih/zoom/2)':" (...) --
00:14
Extend Frame Size and Re-Encoding Video to be Blu-Ray Compliant with ffmpeg and tsMuxer - grendell Newest 'ffmpeg' Questions - Stack Overflow

I have a media file with the following video stream: Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt709), 1440x1080 [SAR 1:1 DAR 4:3], 23.98 fps, 23.98 tbr, 1k tbn (default) I am attempting to extend the frame size to 1920x1080 and re-encode the video with libx264 to create a Blu-ray compatible video stream. I am using the following command (video filter from here): ffmpeg -i original.mkv -c:v libx264 -preset veryslow -tune animation -profile:v high -crf 16 -pix_fmt yuv420p -vf (...)

22 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:28
FFmpeg: About filter_complex command - HJ Kim Newest 'ffmpeg' Questions - Stack Overflow

I use this command. ffmpeg -i Input.mp4 -i logo.png -c:v h264_nvenc -filter_complex "[0:v]scale=-1:720[video];[1:v][video]scale2ref=(iw/ih)*ih/8/sar:ih/8[wm][base];[base][wm]overlay=10:10" output.mp4 But what does this mean? scale2ref=(iw/ih)*ih/8/sar:ih/8
11:06
How is better to use ffmpeg with the ASP.NET Core, on Linux? - user8245660 Newest 'ffmpeg' Questions - Stack Overflow

I've got the project (ASP.NET Core, on Linux) where are the several tasks, which relate to the video converting and extracting frames from the video file. I thought about the two possible options: using ffmpeg console utility using P/Invoke with the libavcodec library and others, which ffmpeg uses The second option is miles harder and may be very impractical, because it reminds me developing the new wrapper/library, instead of using the ready products. I've done googling, but there aren't well-done projects for the (...)

21 novembre

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

12:08
FFmpeg wrong codecstring for DASH manifest [closed] - Suxsem Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to create a DASH stream with ffmpeg with the following command: ffmpeg -i rtsp://admin:***ⓐcamera-retro.lan/ch0_0 ^ -map 0 ^ -codec:v copy ^ -codec:a copy ^ -f dash ^ -use_template 1 ^ -use_timeline 1 ^ -window_size 50 ^ -extra_window_size 5 ^ -seg_duration 5 ^ tmp/output.mpd The problem is the generated manifest doesn't contain a valid codecstring for the video part (note the codecs="hev1" part) and thus is not playable by the browser: <?xml version="1.0" encoding="utf-8"?> Session (...)
14:30
How do you convert fragmented MP4 to MP4 with ffmpeg and keep all fragments? [closed] - Lars Rönnbäck Newest 'ffmpeg' Questions - Stack Overflow

I am trying to convert a fragmented MP4 (fMP4) to a single MP4 file using ffmpeg. I expected the following command to work, but it only results in the initialization segment and the last three segments being processed by ffmpeg. I am using version 6.1.1 of ffmpeg. ffmpeg -i playlist.m3u8 -c copy complete.mp4 The content of the playlist is as follows. #EXT-X-VERSION:7 #EXT-X-TARGETDURATION:2 #EXT-X-MEDIA-SEQUENCE:0 #EXT-X-PLAYLIST-TYPE:EVENT #EXT-X-MAP:URI="segment_00000.mp4" #EXTINF:0.525000, segment_00001.m4s #EXTINF:2.000000, segment_00002.m4s
11:30
FFMPEG ratio and SAR to 1 [closed] - Aurelien Stride Newest 'ffmpeg' Questions - Stack Overflow

I have a video of 1280x720px with a SAR = 540:401. My purpose is, with FFMPEG, to set SAR to 1, and get a final resolution of 1280*534.
22:29
Python ffmpeg: [WinError 2] The system cannot find the file specified [duplicate] - PeppersONLY Newest 'ffmpeg' Questions - Stack Overflow

#what i did to install pip install ffmpeg-python #code import ffmpeg crop_dimensions = "640:480:0:0" input_file = "input.mp4" output_file = "output.mp4" ( ffmpeg .input(input_file) .filter("crop", *crop_dimensions.split(":")) .output(output_file, vcodec="libx264", crf=22) .overwrite_output() .run() ) Whenever I run this code, I get this error: hp, ht, pid, tid = _winapi.CreateProcess(executable, args, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ FileNotFoundError: [WinError 2] (...)
21:05
Converting Multiple Videos from S3 into GIFs with Random Frames using Python and Lambda - rahulfaujdar Newest 'ffmpeg' Questions - Stack Overflow

I have a collection of videos stored in an S3 bucket, and I'm looking to automate the process of converting these videos into GIFs using Python and Lambda. Each resulting GIF should be precisely 10 seconds long and should contain random frames sampled from different parts of the corresponding video. By random frames, I mean frames from the beginning, middle, and end of each video, creating a dynamic GIF experience. I've started implementing this functionality using ffmpeg within a Python Lambda function, but I'm encountering difficulties in achieving the desired (...)
21:05
How to convert video(stored in S3) to image and upload it back to S3 bucket? - Leena Bharambe Newest 'ffmpeg' Questions - Stack Overflow

I am trying to perform below steps: Read video from S3 bucket Convert Video into images and upload images to S3 back I don't want to use any Local file system or don't want to store video/image in local disk. Running the code as an AWS Lambda function. In Java, How can we upload an image directly to S3 after framing a video? In Node, Can we pass s3 url to ffmpeg either to command line utility or a code module? Sharing some sample code which I am using to read video from S3: String (...)
15:27
How to Record a Seekable Video File with Lossless Compression which is seekable while recording? [closed] - Christian Schaffner Newest 'ffmpeg' Questions - Stack Overflow

I am using FFmpeg to record a dshow device to a .mkv file. My goal is to use a lossless codec like H.264 or FFV1 for the best quality. Here’s the issue I’m encountering: In my application, the recorded file needs to be played in another application while recording is still in progress. While playback works, the file is not seekable because the index is written only after the recording ends. My question: Is there any way to record a video that remains seekable, even if the recording process is incomplete? I am open to low-filesize, uncompressed formats or other practical (...)
12:26
How to Record a Seekable Video File with Lossless Compression wich is seekable while recording? - Christian Schaffner Newest 'ffmpeg' Questions - Stack Overflow

I am using FFmpeg to record a dshow device to a .mkv file. My goal is to use a lossless codec like H.264 or FFV1 for the best quality. Here’s the issue I’m encountering: In my application, the recorded file needs to be played in another application while recording is still in progress. While playback works, the file is not seekable because the index is written only after the recording ends. My question: Is there any way to record a video that remains seekable, even if the recording process is incomplete? I am open to low-filesize, uncompressed formats or other practical (...)
08:20
Ffmpeg for use in iOS application coded in Swift - Xavi Font Newest 'ffmpeg' Questions - Stack Overflow

I have been browsing the web, even this website... bu cannot find a good option to implement ffmpeg functionality in an iOS application made in swift. Options looked at and reasons why they are not solutions: SwiftFFmpeg - I am not sure it can run on iOS, plus I don't see an option to run my desired Ffmpeg command. MobileFFmpeg - Not maintained anymore, and a new project by the same founders created a "better altenrative" called ffmpeg-kit. ffmpeg-kit - looks amazing, but their API only allows for interaction in the Objective-C language. Any solutions anyone (...)
08:58
Problems using FFmpeg / libavfilter for adding overlay to grabbed frames - Michael Newest 'ffmpeg' Questions - Stack Overflow

On Windows with latest FFmpeg / libav (full build, non-free) a C/C++ app reads YUV420P frames from a frame grabber card. A bitmap (BGR24) overlay image from file should be drawn on every frame for the first 20 seconds via libavfilter. First, the BGR24 overlay image becomes converted via format filter to YUV420P. Then the YUV420P frame from frame grabber and the YUV420P overlay frame are pushed into the overlay filter. FFmpeg / libavfilter does not report any errors or warnings in console / log. Trying to get the filtered frame out of the graph via (...)
06:51
Is Replacing Dynamic Resolution with scale_amf in FFmpeg Command a Good Direction? - fred Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a Lua script for MPV that processes 360-degree videos using FFmpeg's v360 filter. The original command dynamically calculates the output resolution based on a res variable, like this: mp.command_native_async( "no-osd", "vf", "add", string.format( "ⓐvrrev:v360=%s:%s:reset_rot=1:in_stereo=%s:out_stereo=2d: id_fov=%s:d_fov=%.3f:yaw=%.3f:pitch=%s:roll=%.3f: w=%s*192.0:h=%.3f*108.0:h_flip=%s:interp=%s", in_flip, inputProjection, outputProjection, in_stereo, idfov, dfov, yaw, pitch, roll, res, res, h_flip, scaling ) , (...)

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