id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
1435,Remuxing aac from mov to avi breaks timestamps,feelart,,"
FFmpeg 0.11.1 (32bits static) under WinXP

Hi,

This bug seems similar to other bug tracking on synchronisation issues.

Bug affects any input video, with same codecs & container.

Input video directly from camera, see below.

Descrynize output with (note wrong duration is displayed for the output video)

ffmpeg -i ""2012-03 03Praha.mp4"" -async 1 -acodec copy -vcodec mpeg4 -q 20 out_mpeg4AVI.avi

Synchronize output with:
ffmpeg -i ""2012-03 03Praha.mp4"" -async 1 -f mp4 -acodec copy -vcodec mpeg4 -q 20 out_mpeg4AVIMP4.avi

Now interestingly,

1/ if one takes the 1st instruction line, but changes to mkv or mp4, no problem, example
ffmpeg -i ""2012-03 03Praha.mp4"" -async 1 -acodec copy -vcodec mpeg4 -q 20 out_mpeg4_mp4.mp4

2/ if one takes the 1st instruction line, but converts the audio, no probem
ffmpeg -i ""2012-03 03Praha.mp4"" -async 1 -acodec libmp3lame  -vcodec mpeg4 -q 20 out_mpeg4AVI_mp3.avi

3/ Now, no problem with
ffmpeg -i out_mpeg4.mp4 -vcodec copy -acodec copy -f mp4 output.avi

4/ KO with
ffmpeg -i out_mpeg4.mkv -vcodec copy -acodec copy -f mkv output.avi

Input video available on request.

Details:
{{{
C:\Documents and Settings\Angel\Mes documents\Downloads>ffmpeg -v 9 -loglevel 99 -i ""2012-03 03Praha.mp4"" -async 1 -acodec copy -vcodec mpeg4 -q 20 out_mpeg4AVI.avi
ffmpeg version N-41416-g718607b Copyright (c) 2000-2012 the FFmpeg developers
  built on Jun  8 2012 12:46:19 with gcc 4.6.3
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --ena
  libavutil      51. 56.100 / 51. 56.100
  libavcodec     54. 25.100 / 54. 25.100
  libavformat    54.  6.101 / 54.  6.101
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 78.101 /  2. 78.101
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 022dd220] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 022dd220] ISO: File Type Major Brand: MSNV
[mov,mp4,m4a,3gp,3g2,mj2 @ 022dd220] File position before avformat_find_stream_info() is 54769662
[mov,mp4,m4a,3gp,3g2,mj2 @ 022dd220] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 022dd220] File position after avformat_find_stream_info() is 545749
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2012-03 03Praha.mp4':
  Metadata:
    major_brand     : MSNV
    minor_version   : 19595353
    compatible_brands: MSNVmp42isom
    creation_time   : 2012-03-29 21:13:18
  Duration: 00:00:49.04, start: 0.000000, bitrate: 8933 kb/s
    Stream #0:0(und), 15, 1/30000: Video: mpeg4 (Advanced Coding Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1/30000, 8866 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc
    Metadata:
      creation_time   : 2012-03-29 21:13:18
      handler_name    : Video Media Handler
    Stream #0:1(und), 1, 1/24000: Audio: aac (mp4a / 0x6134706D), 24000 Hz, mono, s16, 64 kb/s
    Metadata:
      creation_time   : 2012-03-29 21:13:18
      handler_name    : Sound Media Handler
[buffer @ 022ddd40] w:1280 h:720 pixfmt:yuv420p tb:1/30000 sar:1/1 sws_param:flags=2
[ffmpeg_buffersink @ 022dda40] No opaque field provided
[mpeg4 @ 022d9a40] detected 1 logical cores
[mpeg4 @ 022d9a40] intra_quant_bias = 0 inter_quant_bias = -64
[mpeg4 @ 022d23c0] detected 1 logical cores
Output #0, avi, to 'out_mpeg4AVI.avi':
  Metadata:
    major_brand     : MSNV
    minor_version   : 19595353
    compatible_brands: MSNVmp42isom
    creation_time   : 2012-03-29 21:13:18
    ISFT            : Lavf54.6.101
    Stream #0:0(und), 0, 1001/30000: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1001/30000, q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc
    Metadata:
      creation_time   : 2012-03-29 21:13:18
      handler_name    : Video Media Handler
    Stream #0:1(und), 0, 16/375: Audio: aac ([255][0][0][0] / 0x00FF), 24000 Hz, mono, 64 kb/s
    Metadata:
      creation_time   : 2012-03-29 21:13:18
      handler_name    : Sound Media Handler
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 1470 fps= 32 q=20.0 Lsize=    5169kB time=00:00:49.02 bitrate= 863.7kbits/s
video:4713kB audio:383kB global headers:0kB muxing overhead 1.421177%

C:\Documents and Settings\Angel\Mes documents\Downloads>
}}}",defect,closed,normal,undetermined,git-master,fixed,avi aac desync,,,,1,0