4 novembre

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 21:11
  is it possible to compile x264 for webassembly using emscripten? - sunder kandasamy Newest 'x264' Questions - Stack Overflow
  I am trying to build x264 code for webassembly. i use emconfigure to configure. like below emconfigure ./configure --prefix="$(pwd)/em" --enable-shared --enable-static --disable-cli --disable-gpl But this was throwing "No working C compiler found." error. i have gcc compiler 9.3.0 version and have tried reinstalling build-essentials and gcc but still same issue. config.log also doesn't help. If i provide --host cross compiler flag then it is generating libx264.so file, but i am not sure whether this is right as the wasm code should work in every browser in (...)

26 octobre

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 04:13
  h264 RTP timestamp - user269090 Newest 'x264' Questions - Stack Overflow
  I have a confusion about the timestamp of h264 RTP packet. I know the wall clock rate of video is 90KHz which I defined in the SIP SDP. The frame rate of my encoder is not exactly 30 FPS, it is variable. It varies from 15 FPS to 30 FPS on the fly. So, I cannot use any fixed timestamp. Could any one tell me the timestamp of the following encoded packet. After 0 milisecond encoded RTP timestamp = 0 (Let the starting timestamp 0) After 50 milisecond encoded RTP timestamp = ? After 40 milisecond encoded RTP timestamp = ? After 33 milisecond encoded RTP (...)

23 septembre

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 15:06
  avcodec_find_encoder(AV_CODEC_ID_H264) returns null - Monjura Rumi Newest 'x264' Questions - Stack Overflow
  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 (...)

18 août

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 10:00
  x264/x265 options for fast decoding while preserving quality - user3301993 Newest 'x264' Questions - Stack Overflow
  I want to encode some videos in H264 and H265, and I would like to ask for help in order to chose the adequate options in x264/x265. My first priority is video quality. Lossless would be the best quality for example My second priority is fast decoding speed (ie: I would like faster decoding without sacrificing quality) fast decoding for me means that the decoding machine would use less CPU resources reading the resulting video Less RAM consumption would be a plus Latency is not important I don't care that much if the output file ends up (...) -- x265 doc

26 mai

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 05:48
  How to check 'Output bit depth' of the libx264 library in ffmpeg? - Greg Newest 'x264' Questions - Stack Overflow
  According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything about Output bit depth and the crf scale option is described as from -1 to FLT_MAX. How can I check if my ffmpeg is using 8-bit or 10-bit version of the libx264 library? -- x264 Encoding Guide

24 mai

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 13:45
  I use ffmpeg to encode and create MPEG file from a source MP4 file. In Mac the encoding is good but in windows it creates random green pixels [closed] - Amudhan R Newest 'x264' Questions - Stack Overflow
  I use ffmpeg 3.4.2 version to encode and create an MPEG-TS file using H.264 encoding. In both Windows and Mac the ffmpeg creates the video without any error. But the resultant video from windows having a green pixels on certain frames. No idea why this is happening. Below is the encoding command: ffmpeg -i VIDEO_SOURCE.mp4 -vf scale=720:480 -c:v libx264 -b:v 2M -minrate 2M -maxrate 2M -bufsize 2M -level:v 40 -profile:v main -bf:v 2 -r 30 -crf 22 -x264-params 'keyint=3:min-keyint=3:ref=2:8x8dct=0:weightp=1:subme=6:rc-lookahead=30' -c:a aac -b:a 130k -ar 48000 -f mpegts (...)

25 avril

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 22:49
  Is it still possible to compile modern x264 with the nal long start code used prior to release r1510? - Bryan Knowles Newest 'x264' Questions - Stack Overflow
  I'm currently nerding out on old technology with HD-DVDs. The only freely available muxer is hddvdmux, I'm using MultiAVCHD for this. Beginning with r1510, x264 switched to short start packets for NAL HRD (from what I understand). This makes the stream incompatible with hddvdmux. deank on doom9 patched hddvdmux to accept short start codes, but in doing so, the video file plays too quickly and the audio goes out of sync. The results I'm getting from the 2009 release of x264 leave much to be desired in comparison to modern releases, and I'd like to get those (...)

8 avril

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 22:04
  What are the licence free codecs for FFMPEG? - FunkyPizza Newest 'x264' Questions - Stack Overflow
  So I've recently started implementing ffmpeg in an application that I do intend to distribute commercially. And I've had an hard time getting my head around the whole licensing process. The most commonly answered question I've seen seems to be about x264 which requires a paid licence from x264.org in order to use it commercially (right?). I started to look into mpeg4 instead but that too seemed to be locked behind some patent licensing fee (https://www.mpegla.com/programs/mpeg-4-visual/license-agreement/). I guess my question is the following, what (...) -- https://www.mpegla.com/programs/mpeg-4-visual/license-agreement/

19 mars

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 14:19
  How to create IDR I-slice frame for H264 bytestream? - galuk Newest 'x264' Questions - Stack Overflow
  I depacketize the H264 video fragments from an IP.RTP stream and save them to video.ivf file. After depacketizing i have only [SPS] ,[PPS] and [non-IDR slice]. I try to create IDR slice by using x264 lib. x264 lib creates IDR frame which consists of 0x000001[SPS] 0x000001[PPS] 0x0001[SE slice] and 0x0001[I slice]. i insert it in the beginning of my file. But when i try to play this with VLC player it doesn't plays well. if i convert it to video.mp4 by ffmpeg i get playablr file. I think the problem is that after creating IDR frame with x264 lib I get SPS and PPS frames different from (...)

24 février

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 14:29
  ffmpeg not working after update to Mavericks - Hudson Buddy Newest 'x264' Questions - Stack Overflow
  After recently updating to Mavericks 10.9.5, my installation of ffmpeg has been bugging out Error: dyld: Library not loaded: /usr/local/lib/libx264.142.dylib Referenced from: /usr/local/bin/ffmpeg Reason: image not found Trace/BPT trap: 5 Any thoughts? I'm not very familar with manual compiling and I installed ffmpeg through Homebrew. I tried uninstalling and doing: brew install ffmpeg --HEAD brew install ffmpeg --build-from-source but it spits back a ./configure error ==> ./configure (...)

23 février

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 09:42
  Error Linking FFmpeg with libx264: Undefined Reference to __imp_x264_encoder_open_163 - zeyu Newest 'x264' Questions - Stack Overflow
  I'm attempting to compile FFmpeg with libx264 support on Windows using MinGW-w64, but I'm encountering a linking error when building . The error points to an undefined reference to in . Here are the details of the error message:libavcodec/avcodec-57.dll__imp_x264_encoder_open_163libx264.o In fact, I want to run the AccMPEG branch from https://github.com/Alex-q-z/myh264.git, and I am looking to obtain an executable (exe) to run on Windows. LD libavcodec/avcodec-57.dll E:/MSY/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: (...) -- https://github.com/Alex-q-z/myh264.git

21 février

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 04:49
  Why is a file unplayable in Windows Media Player? - zhang Newest 'x264' Questions - Stack Overflow
  I have written some code to generate a MP4 video. This is a simplified version of the code: #include #include #include #include #include #include extern "C" #include "libavformat/avformat.h" #include "libavutil/frame.h" #include "libavcodec/avcodec.h" #include "libavutil/imgutils.h" using namespace std; const int output_width = 180; const int output_height = 320; int main(int argc, char **argv) AVCodec *output_avc = avcodec_find_encoder_by_name("libx264"); if (!output_avc)  (...)

19 février

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 21:47
  h264 ffmpeg: How to initialize ffmpeg to decode NALs created with x264 - Raul Calvo Newest 'x264' Questions - Stack Overflow
  I encoded some frames using x264, using x264_encoder_encode() and after that I created AVPackets using a function like this: bool PacketizeNals( uint8_t* a_pNalBuffer, int a_nNalBufferSize, AVPacket* a_pPacket ) if ( !a_pPacket ) return false; a_pPacket->data = a_pNalBuffer; a_pPacket->size = a_nNalBufferSize; a_pPacket->stream_index = 0; a_pPacket->flags = AV_PKT_FLAG_KEY; a_pPacket->pts = int64_t(0x8000000000000000); a_pPacket->dts = int64_t(0x8000000000000000); I call this function like this: x264_nal_t* (...)

7 février

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 16:27
  how to use x264 dll in another project - Hadi Rasekh Newest 'x264' Questions - Stack Overflow
  I want to use x264 in my project. There is some line in the code said: `/* Application developers planning to link against a shared library version of libx264 from a Microsoft Visual Studio or similar development environment will need to define X264_API_IMPORTS before including this header. This clause does not apply to MinGW, similar development environments, or non Windows platforms. */` But I don't get this line: define X264_API_IMPORTS before including this header We can create x264 dll by its configuration and make ./configure (...)

23 janvier

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 13:40
  How to limit the maximum bitrate of x264? - Chan Charis Newest 'x264' Questions - Stack Overflow
  I want to encode Blu-ray M2TS files with x264, my code is like this: enc_ctx = avcodec_alloc_context3(codec); enc_ctx->codec_id = AV_CODEC_ID_H264; enc_ctx->bit_rate = 20000000; When a video has a simple scene, such as 10 seconds, its encoding bitrate will be very small, only 1M or 2M bitrate. In order to achieve an average bitrate of 20M/s, the subsequent bitrate will be very large, sometimes reaching 150M/s. , at this time Blu-ray Player will freeze due to high bitrate. I set enc_ctx->rc_max_rate = 50000000; but it seems to have no effect. How can I limit the (...)