[FFmpeg-user] iPod conversion fail

. peace at AleksandrSolzhenitsyn.net
Thu Dec 20 16:20:10 CET 2012


Sorry to bother you folks again but I'm not being too successful lately
in converting Youtube videos to be played on my iPod 160G Classic.

The problem occurs with videos over 10 minutes- around the 16 minute
mark they speed up for a few seconds and run all the way to the end of
the video and stop.

The information the video that's crashing-

$ ffmpeg -i CB.mp4
ffmpeg version git-2012-06-29-c103dc0 Copyright (c) 2000-2012 the FFmpeg
developers
  built on Jun 28 2012 21:43:37 with gcc 4.6.3
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree
--enable-version3 --enable-x11grab
  libavutil      51. 63.100 / 51. 63.100
  libavcodec     54. 29.101 / 54. 29.101
  libavformat    54. 11.100 / 54. 11.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     3.  0.100 /  3.  0.100
  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 @ 0xa8fe3e0] multiple edit list entries, a/v
desync might occur, patch welcome
    Last message repeated 1 times
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xa8fe3e0] max_analyze_duration 5000000
reached at 5016009
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xa8fe3e0] Could not find codec parameters
(Video: h264 (avc1 / 0x31637661), 320x180, 350 kb/s)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'CB.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.11.100
  Duration: 00:58:03.43, start: 0.000000, bitrate: 380 kb/s
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), 320x180, 350
kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo,
s16, 85 kb/s
    Metadata:
      handler_name    : SoundHandler
At least one output file must be specified


Here's the code I used to encode the video....at least I'm pretty sure
that's the code I used (I've tried so many of different ones);


ffmpeg -i INPUTFILE.mp4 -vcodec libx264 -preset ultrafast -vpre ipod320 -crf 24 -acodec libfaac -aq 100  -vf scale="320:trunc(ow/a/2)*2"  CB.mp4

Any idea how to fix this? 

Thank you so much.





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