id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
1670,-filter_complex doesn't handle well finite video + infinite audio,ubitux,,"Given a 60 seconds video stream:

{{{
./ffmpeg -v 0 -f lavfi -i testsrc=d=60 -y video.mp4
}}}

and a 5 seconds audio stream:

{{{
./ffmpeg -v 0 -f lavfi -i 'aevalsrc=sin(440*2*PI*t)::d=5' -y audio.wav
}}}

We can make a video presentation of 60 seconds with the 5 seconds audio padded with silence with the following command line:

{{{
./ffmpeg -f lavfi -i 'movie=video.mp4 [out0]; amovie=audio.wav [audio]; aevalsrc=0 [silence]; [audio][silence] concat=v=0:a=1 [out1]' -y out.avi
}}}

Unfortunately, this doesn't work with the -filter_complex option:
              
{{{
% ./ffmpeg -i video.mp4 -i audio.wav -filter_complex 'aevalsrc=0 [silence]; [1:0][silence] concat=v=0:a=1 [padded_audio]' -map 0:0 -map '[padded_audio]' -y out.avi     
ffmpeg version N-43791-g2c7a622 Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 21 2012 21:01:23 with gcc 4.7.1 (GCC) 20120721 (prerelease)
  configuration: --enable-gpl --enable-fontconfig --enable-libfreetype --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg --enable-libass --enable-libmodplug --enable-libv4l2 --cc='ccache colorgcc' --samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall
  libavutil      51. 70.100 / 51. 70.100
  libavcodec     54. 54.100 / 54. 54.100
  libavformat    54. 25.104 / 54. 25.104
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3. 13.100 /  3. 13.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.25.104
  Duration: 00:01:00.00, start: 0.000000, bitrate: 37 kb/s
    Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 320x240 [SAR 1:1 DAR 4:3], 34 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
    Metadata:
      handler_name    : VideoHandler
Guessed Channel Layout for  Input Stream #1.0 : mono
Input #1, wav, from 'audio.wav':
  Duration: 00:00:05.01, bitrate: 705 kb/s
    Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s
Output #0, avi, to 'out.avi':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    ISFT            : Lavf54.25.104
    Stream #0:0(und): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, mono, s16
Stream mapping:
  Stream #1:0 (pcm_s16le) -> concat:in0:a0 (graph 0)
  Stream #0:0 -> #0:0 (h264 -> mpeg4)
  concat (graph 0) -> Stream #0:1 (libmp3lame)
Press [q] to stop, [?] for help
frame= 1500 fps=177 q=9.6 Lsize=   13088kB time=00:01:00.00 bitrate=1786.9kbits/s    
}}}

This creates some kind of infinite loop, with fps slightly decreasing over time (+memory leak)",defect,new,normal,FFmpeg,unspecified,,,,,,1,0