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• avformat/amr : Fix writing AMR header

  6 janvier 2022, par Andreas Rheinhardt

  avformat/amr : Fix writing AMR header
  Regression since f282c34c009e3653ec160c3880e64fc1a9300d0e.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/amr.c

• avcodec/arm/vp8 : Don't discard const

  28 mars 2024, par Andreas Rheinhardt

  avcodec/arm/vp8 : Don't discard const
  Forgotten in 25e1986e6816fabf7f6065d090994f8ad050e540.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/arm/vp8.h

• Pass camera input to ffmpeg

  30 mai 2017, par Sachin Sonone

  I am trying to develop an delphi app which will show a preview of the camera in the delphi form and then send the frames of video as images to the ffmpeg in the stdin of ffmpeg. ffmpeg then broadcast the video to wowza server over rtmp. but fmpeg gives an error ’pipe:0 Bad file descriptor’

      FFMPEG command:
  
      ffmpeg -f image2pipe -i pipe:0  -c:v libx264 -y -report -f flv wowza_url

  I followed this https://msdn.microsoft.com/en-us/library/ms682499(VS.85).aspx article to build the parent app which will open ffmpeg as a child and use FFmpeg’s stdin to pass input

     // Create a pipe for the child process's STDOUT.
  
  Createpipe(STDOut_ReadPipe, STDOut_WritePipe, @Security,0);
  
  
  
    // Ensure the read handle to the pipe for STDOUT is not inherited.
  
  SetHandleInformation(STDOut_ReadPipe,HANDLE_FLAG_INHERIT,0);
  
  
  
  // Create a pipe for the child process's STDIN.
  
  
  
  if (  CreatePipe(STDIn_ReadPipe , STDIn_WritePipe, @Security, 0) = true) then
  
  
  
  
  
  // Ensure the write handle to the pipe for STDIN is not inherited.
  
  
  
  SetHandleInformation(STDIn_WritePipe, HANDLE_FLAG_INHERIT, 0)  ;

  This the code to start ffmpeg process

  FillChar(StartupInfo,Sizeof(StartupInfo),0);
  
  StartupInfo.cb := Sizeof(StartupInfo);
  
  StartupInfo.dwFlags := STARTF_USESTDHANDLES;
  
  
  
  
  
  StartupInfo.wShowWindow := 1;
  
  S := args;
  
  UniqueString(S);
  
  
  
  StartupInfo.hStdError := STDOut_WritePipe;
  
  StartupInfo.hStdOutput := STDOut_WritePipe;
  
  StartupInfo.hStdInput := STDIn_ReadPipe;

  but as soon as program start ffmpeg exits with the error.

  This is the full console log of the ffmpeg

  ffmpeg started on 2017-05-30 at 18:45:36
  
  Report written to "ffmpeg-20170530-184536.log"
  
  Command line:
  
  "ffmpeg.exe" -f image2pipe -i pipe:0 -report -movflags +faststart -tune 
  
  zerolatency -an -pix_fmt yuv420p -preset ultrafast -vcodec libx264 -b:v 250k 
  
  -y -f flv test.flv
  
  ffmpeg version N-85750-ga75ef15 Copyright (c) 2000-2017 the FFmpeg 
  
  developers
  
   built with gcc 6.3.0 (GCC)
  
   configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid 
  
  --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-
  
  avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls 
  
  --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-
  
   libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-
  
    libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb 
  
    --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --
  
   enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --
  
    enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab 
  
   --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-
  
       libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-
  
     libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 61.100 / 55. 61.100
  
    libavcodec     57. 93.100 / 57. 93.100
  
    libavformat    57. 72.101 / 57. 72.101
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 88.100 /  6. 88.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
    Splitting the commandline.
  
     Reading option '-f' ... matched as option 'f' (force format) with 
  
      argument 'image2pipe'.
  
     Reading option '-i' ... matched as input url with argument 'pipe:0'.
  
    Reading option '-report' ... matched as option 'report' (generate a 
  
    report) with argument '1'.
  
    Reading option '-movflags' ... matched as AVOption 'movflags' with 
  
    argument '+faststart'.
  
    Reading option '-tune' ... matched as AVOption 'tune' with argument 
  
    'zerolatency'.
  
     Reading option '-an' ... matched as option 'an' (disable audio) with 
  
     argument '1'.
  
     Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel 
  
     format) 
  
    with argument 'yuv420p'.
  
   Reading option '-preset' ... matched as AVOption 'preset' with argument 
  
   'ultrafast'.
  
   Reading option '-vcodec' ... matched as option 'vcodec' (force video codec 
  
  ('copy' to copy stream)) with argument 'libx264'.
  
    Reading option '-b:v' ... matched as option 'b' (video bitrate (please use -
  
   b:v)) with argument '250k'.
  
    Reading option '-y' ... matched as option 'y' (overwrite output files) 
  
   with 
  
   argument '1'.
  
   Reading option '-f' ... matched as option 'f' (force format) with argument 
  
  'flv'.
  
  Reading option 'test.flv' ... matched as output url.
  
   Finished splitting the commandline.
  
   Parsing a group of options: global .
  
    Applying option report (generate a report) with argument 1.
  
   Applying option y (overwrite output files) with argument 1.
  
   Successfully parsed a group of options.
  
   Parsing a group of options: input url pipe:0.
  
   Applying option f (force format) with argument image2pipe.
  
    Successfully parsed a group of options.
  
   Opening an input file: pipe:0.
  
   [pipe @ 003bdea0] Setting default whitelist 'crypto'
  
   [AVIOContext @ 03115e60] Statistics: 0 bytes read, 0 seeks
  
   pipe:0: Bad file descriptor'