[x264-devel] Generating H264 for iPad?

[Reindl Harald]

Am 21.02.2012 23:18, schrieb Hadmut Danisch:
> Hi,
> 
> I just ran into a particular problem with ffmpeg and H264 encoding, and
> was forwarded by package maintainers to this mailing list.
> 
> 
> I'd like to convert several videos into H264, most of them into
> 1280x720, currently testing bitrates between 700k and 2000k. I'd like to
> use the generated videos on Computers, network DLNA streamers, and
> mobile devices such as iPad.
> 
> The problem I've ran into:
> 
> The videos I generate with ffmpeg (e.g. ffmpeg -i sample_in.mp4 -vcodec
> libx264 -vpre superfast -b 2000k -acodec copy -s 1280x720 -aspect 16:9
> sample_out.mp4 ) can be viewed without any problem on computers and my
> network streamers, but not on my iPad. The iPad drops frames, can't
> generate full screens, completely freezes the screen. This does not
> happen if I reduze the resolution. The problem is obviously that the
> iPad does not have enough computation power.

you need baseline profile!

iphones are refusing videos with main-profile completly

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