[FFmpeg-user] Plays too fast on iPod?

[dE .]

On 11/28/11 20:27, . wrote:
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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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> Version: GnuPG v1.4.10 (GNU/Linux)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
>
> iQEcBAEBAgAGBQJO06FRAAoJEPBpZNn4grcjPMAH/0UKLjIdrvK8W/ptjVfoUOW5
> NTz2AH8eykcC8kU8bjpMTOg8CteIlvLMN2VuQ5k3y6LOeAfKeMIakCM9fkS8qDVS
> ueiBlkAkmcOOfX/HzlsKJVUmuc1SfuznAKF2dNcOuP6pfqhaqD8i++sG0IPtgMbe
> FwHk2gX2HlAhTI4aN3OV+UOYPBmUWGA7Al7wMNiKne5GLaJjPuco2xowAzDYM/ZO
> Lk+655IJPKRWYmm3Hn6ivjEJQnZdYpQOy2hcNhUFNli0sInTV6eU307qvHljZ0nB
> etDxk21oWTw3hPoWwdDbeu1iXVIVJJr54UQlvaBocnA788jO9sNV42URTrgsxcU=
> =5lAM
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>
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Have you tried any other codecs like xvid? And have you tried playing 
any other 17+ minute video (like download from youtube?) I've read 
this's a problem with ipod.