[FFmpeg-user] Plays too fast on iPod?

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I put a video named 'dotdmeta.mp4' onto my iPod 160 G (Classic).  Below
is the FFMPEG -i information.

The video plays fine until about the 17 minute mark and then playback
speeds up to twice its normal speed.  Once the video speeds up the audio
is out of sync with the video too.

However, if I convert the video using the following FFMPEG code line the
playback on the iPod is fine (but the conversion takes a long, long time).

ffmpeg -i dotdmeta.mp4 -vcodec libx264 -preset medium -vpre ipod640 -crf
24 -acodec libfaac -aq 100  -vf scale="640:trunc(ow/a/2)*2" DOD.mp4


Any idea how to easily fix it?


Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'dotdmeta.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01 00:00:00
    encoder         : Lavf53.20.0
 
Duration: 00:48:42.44, start: 0.000000, bitrate: 433 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 /
0x31637661), yuv420p, 480x360 [SAR 1:1 DAR 4:3], 331 kb/s, 25 fps, 25
tbr, 25 tbn, 50 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
   
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16,
95 kb/s
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    :



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