1er avril

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

• 19:05
  FFmpeg WASM Custom build : defining custom flags - Ettur Newest 'ffmpeg' Questions - Stack Overflow
  I wish to create custom ffmpeg.wasm build Now the official GUIDE show four commands "make dev" "make prd" etc So I cloned THE REPO and ran "make prd". It did build, but obviously, this build was with default settings, whatever exactly they made be. So pardon my stupidity, as I cannot figure out how / where / what do I edit to set the custom flags about what I want to be included / excluded in the build? -- GUIDE, THE REPO
• 13:02
  Use FFMPEG and i have one video 30sec i want mulipal trimming - aryan patel Newest 'ffmpeg' Questions - Stack Overflow
  i want this video trim mulipal like 0.2 sec to 0.5, 0.10sec to 0.14sec and 0.23 to 0.29sec this video trimed success after i want this trimed 3 video merge and create one video and save that any one can know me how
• 12:59
  ffmpeg decoding mixing frames - Paulo Morgado Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg.AutoGen in a .NET 8.0 application for decoding H264 and JPEG. Every usage uses its own instance (there are no shared objects) and there isn't simultanous use of each object. However, they can be used from different threads. But I'm getting the encoded results with mixed data from all sources. It happens mostly for the same origin codeec, but not esclusivelly. I have a base class that looks like this: public abstract unsafe class Decoder : IDisposable protected readonly object sync = new(); protected AVCodecContext* (...) -- FFmpeg.AutoGen
• 13:26
  How to restream IPTV playlist with Nginx RTMP, FFmpeg, and Python without recording, but getting HTTP 403 error? [closed] - boyuna1720 Newest 'ffmpeg' Questions - Stack Overflow
  I have an IPTV playlist from a provider that allows only one user to connect and watch. I want to restream this playlist through my own server without recording it and in a lightweight manner. I’m using Nginx RTMP, FFmpeg, and Python TCP for the setup, but I keep getting an HTTP 403 error when trying to access the stream. Here’s a summary of my setup: Nginx RTMP: Used for streaming. FFmpeg: Used to handle the video stream. Python TCP: Trying to handle the connection between my server and the IPTV source. #!/usr/bin/env python3 import sys import (...)
• 08:32
  Merge multiple hls playlists - Boris Newest 'ffmpeg' Questions - Stack Overflow
  I want to speed up the process of HLS segmentation of .mp4 video. Now, processing a half-hour video can take about 5 minutes, and that is too long. To do this, I decided to split the video into fragments, process each of them in parallel, and then create an .m3u8 file that will contain a list of .ts files from all the resulting playlists in the correct order. I used the next commands: ffmpeg -i original.mp4 -acodec copy -f segment -segment_time 10 -vcodec copy -reset_timestamps 1 -map 0 output_time_%d.mp4 for splitting the original video to .mp4 fragments 10 seconds (...)
• 06:46
  How to automatically rotate video based on camera orientation while recording? - jestrabikr Newest 'ffmpeg' Questions - Stack Overflow
  I am developing Mediasoup SFU and client web app, on the server I am recording client's stream by sending it to FFmpeg as plain RTP. FFmpeg creates HLS recording (.m3u8 and .ts files), because I need to be able to switch between WebRTC live stream and HLS recording before live stream ends. My problem is that, when I am testing the app and I rotate my phone 90 degrees, the recording's aspect ratio stays the same but the image is rotated (as shown on images 1.1, 1.2 and 1.3 below). I need for it to change aspect ratio dynamically according to camera orientation. How can I do (...) -- , , , ,
• 03:39
  How to do low-latency streaming on FFMPEG - Wewd Newest 'ffmpeg' Questions - Stack Overflow
  I'm attempting to make video streaming with latency as low as possible at 50ms or lower if possible, assuming that it's streaming over LAN. The latency is like 200-400ms with the config. I'm not sure what's the problem is. ffmpeg -init_hw_device d3d11va \\ -filter_complex "ddagrab=0:output_fmt=auto:framerate=60" \\ -c:v av1_amf -usage ultralowlatency -rc 1 -async_depth 1 -g 60 -fps_mode vfr \\ -fflags nobuffer -flags low_delay -strict experimental \\ -sdp_file stream.sdp -f rtp rtp://225.0.0.1:55555 stream.sdp v=0 o=- 0 0 IN IP4 (...)
• 03:14
  Why does my yuva444p video always lose alpha channel after transcoding to vp9? - Ian Ye Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert a video with alpha channel using FFmpeg, but the transparency information gets lost in the output. Here is the input video (prores, yuva444p) detail with ffprobe: Stream #0:1[0x2](und): Video: prores (4444) (ap4h / 0x68347061), yuva444p12le(bt709), 360x480, 73314 kb/s, 60.13 fps, 60 tbr, 600 tbn (default) Metadata: creation_time : 2019-05-21T21:23:03.000000Z handler_name : Core Media Video vendor_id : appl encoder : Apple ProRes 4444 And my command is below: ffmpeg -i alpha_prores.mov -c:v libvpx-vp9 -pix_fmt (...)
• 00:13
  How can I build a custom version of opencv while enabling CUDA and opengl? - Josh Newest 'ffmpeg' Questions - Stack Overflow
  I have a hard requirement of python3.7 for certain libraries (aeneas & afaligner). I've been using the regular opencv-python and ffmpeg libraries in my program and they've been working find. Recently I wanted to adjust my program to use h264 instead of mpeg4 and ran down a licensing rabbit hole of how opencv-python uses a build of ffmpeg with opengl codecs off to avoid licensing issues. x264 is apparently opengl, and is disabled in the opencv-python library. In order to solve this issue, I built a custom build of opencv using another custom build of ffmpeg both (...)

31 mars

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

• 16:18
  FFMPEG demuxer seek error in Chrome range slider with AWS audio file - Tania Rascia Newest 'ffmpeg' Questions - Stack Overflow
  I'm encountering an issue where if you click or slide enough on a range slider in Chrome, it will eventually stop working and give this error, an error 2 (network error): PIPELINE_ERROR_READ: FFmpegDemuxer: demuxer seek failed If I google this error, I only find the Chrome source code: Line 1749 of Chrome source code First, this issue only happens in Chrome, not Firefox. Second, I can only get it to happen with an encrypted file from AWS, which I can't get into a sandbox, so the sandbox I made will never encounter that error with the random audio file I (...) -- Line 1749 of Chrome source code, Here's the sandbox.
• 15:04
  How to fix av_interleaved_write_frame() broken pipe error in php - Adekunle Adeyeye Newest 'ffmpeg' Questions - Stack Overflow
  I have an issue using ffmpeg to stream audio and parse to google cloud speech to text in PHP. It returns this output. I have tried delaying some part of the script, that did not solve it. I have also checked for similar questions. however, they are mostly in python and none of the solutions actually work for this. built with gcc 8 (GCC) cpudetect libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libavresample 4. 0. (...) --
• 14:15
  RTSP Frame Grabbing creates smeared , pixeled and corrupted images - Robob Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to capture a single frame per second from a RTSP stream with following command ffmpeg -i rtsp://XXX -q:v 1 -vf fps=fps=1 -strftime 1 ZZZZ\\%H_%M_%S.jpg But some of the frames are smeared ,pixeled and corrupted - this effect is drastically increases if rtsp resolution is increased (if the resolution is decreased for example to 720P most of the frames are OK) I have to say that playing same rtsp stream in VLC or FFPLAY is flowless. How I can fix it to grab better quality Thanks in (...) -- ,
• 12:41
  I have a problem with my input resampling FFmpeg audio code [closed] - Jaime Samper Newest 'ffmpeg' Questions - Stack Overflow
  I,ve tried to do a resampling with ffmpeg, but i found issues all the time in my code. firt, i tried to get the imput channel layout but av_channel_layout_default(&layout, audio_codecpar->nb_channels) tells me, "there´s not nb_channels menber. so i put the resampling code manually cause I know is stereo. av_opt_set_sample_fmt(swr_ctx, "in_sample_fmt", codec_ctx->sample_fmt, 0); av_opt_set_int(swr_ctx, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0); av_opt_set_int(swr_ctx, "in_sample_rate", codec_ctx->sample_rate, 0); av_opt_set_sample_fmt(swr_ctx, (...)
• 10:35
  FFmpeg Non-monotonous DTS in output stream - Tim Autin Newest 'ffmpeg' Questions - Stack Overflow
  I need to record a h265 4K RTSP stream into 1/2h segments. I'm using this command: ffmpeg \\ -i "rtsp://..." \\ -vcodec copy \\ -segment_list /path/to/segments_2025-03-31_09-18-45.153_1.txt \\ -f segment -reset_timestamps 1 -segment_time 1800 -strftime 1 \\ "/path/to/segment_%y%m%d%H%M%S.mp4" It works but: the recorded files show some artifact these warnings are print in the console when starting recording: [segment ⓐ 0x6171d02eeac0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the (...)