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• Audio issue while MUXING Audio and Video using FFMPEG

  14 février 2016, par Sajith Jith

  I am writing an Application based on FFMPEG to create an AVI File. The application decodes the incoming Video-Packet(read from an input MP4 file) and then after some image processing it encodes the Video-Packet. The new Encoded-Video-Packet needs to be written into an "AVI" Container along with the Same Audio-Packet (No processing on incoming Audio Stream).

  The Output File is playing the Video but Audio is not working in this. When I observe the VLC-Player Statistics it shows numbers like Audio-Decoded:900 and Lost:901".

  while (av_read_frame(pFormatCtx, &packet) >= 0){
  
  if(packet.stream_index == videoStreamIndex){
  
      //Do the Processing and Encode 
  
  
  
      int out_size = avcodec_encode_video2(outCodecContext, &outPacket, convertedRGBFrame, &got_output);
  
      if (got_output && got_output > 0) {
  
          if( av_interleaved_write_frame (wrtFmtCtx, &outPacket) < 0){
  
                  printf("Error While Writing!!");
  
                  return -5;
  
          }
  
      }
  
  }
  
  else if(packet.stream_index == AudioStreamIndex){
  
      if( av_interleaved_write_frame (wrtFmtCtx, &packet) < 0){
  
          printf("Error While Writing!!");
  
          return -5;
  
      }
  
  }

  }

• checkasm : bench each vf_blend mode once

  20 février 2016, par James Almer

  checkasm : bench each vf_blend mode once
  Also bench a smaller buffer. This drastically reduces —bench runtime
  
  and reports smaller, more readable numbers.
  Reviewed-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] tests/checkasm/vf_blend.c

• ffmpeg build from source fails in docker container ?

  24 mars 2016, par John Allard

  I’m trying to make some changes to the ffmpeg source code (yes, I’m a masochist), and to start I booted an Arch Linux docker container, installed the requirements, downloaded ffmpeg source code, and tried to compile, but I’m getting some extremely odd errors.

  compile command :

  ./configure --bindidr=~/ffmpeg_build --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree

  Output :

  ./configure:unset:3338: no such has table element: mktemp
  
  pr: /tmp/ffconf.uQI7CeV.c: No such file or directory.
  
  pr: /tmp/ffconf.uQI7CeV.c: No such file or directory.
  
  pr: /tmp/ffconf.uQI7CeV.c: No such file or directory.
  
  pr: /tmp/ffconf.uQI7CeV.c: No such file or directory.
  
  ... (24 times)
  
  pr: /tmp/ffconf.uQI7CeV.c: No such file or directory.
  
  pr: /tmp/ffconf.r547UgWy.m: No such file or directory.
  
  ./configure:53378: parse error near '}'
  
  ==> ERROR" A failure occured in build()
  
      Aborting...
  
  The build failed.

  This doesn’t seem to be a problem with ffmpeg, more a problem with the container. If I check find /tmp -name ffconf\* I see that the files do exist and they contain

  extern int getrusage();
  
  int main(void){ getrusage(); }

  what in the hell is going on ? hash tabled ? mktemp not working ? files not being found ?

  edit-

  here is what is on the line numbers in the files that give the errors

  3338:configure - unset -f mktemp
  
  5338:configure - check_builtin gmtime_r time.g "time_t * time; strict tm*; gmtime_r(time, tm)"

  edit2 - Here’s the dockerfile (cloned from here https://hub.docker.com/r/greyltc/archlinux/ /dockerfile/)

  # Arch Linux baseline docker container
  
  # Generated on Sat Mar 19 14:26:28 GMT 2016 using code in this GitHub repo:
  
  # https://github.com/greyltc/docker-archlinux
  
  FROM scratch
  
  MAINTAINER Grey Christoforo <grey@christoforo.net>
  
  
  
  # copy in super minimal root filesystem archive
  
  ADD archlinux.tar.xz /
  
  
  
  # perform initial container setup tasks
  
  RUN setup-arch-docker-container
  
  
  
  # this allows the system profile to be sourced at every shell
  
  ENV ENV /etc/profile