[FFmpeg-user] iPod 640x480

[dE .]

On 11/30/11 05:59, peace at aleksandrsolzhenitsyn.net wrote:
> Can someone explain to me why my iPod can't handle videos at 640x480 
> when the spec's for it say it can?
>
> On Apple's website it does say about the display- 320-by-240-pixel 
> resolution at 163 pixels per inch.  But, it does say in the spec's it 
> can handle 640x480.
>
> Videos at 320 x 240 work perfectly, thanks to all of your help, but 
> for whatever reason the 640's don't.
>
> Being that I'm so stupid about this sort of thing I'm sure there's an 
> easy explanation.
>
>
> The spec's for the iPod Classic (160G) are below.
>
>
>
>
>
>
> H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, 
> Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio 
> up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file 
> formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per 
> second, Baseline Profile up to Level 3.0 with AAC-LC audio up to 160 
> Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 
> video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple 
> Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, 
> .mp4, and .mov file formats
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That's cause it doesn't have a powerful processor to rescale and play 
the video (one of the may reasons I don't prefer Apple). You may like to 
read this --

http://delogics.blogspot.com/2011/11/ffmpeg-maintain-aspect-ratio-with-fixed.html

If you want, I can make the ffmpeg presets.