[mythtv-users] Intel Atom...Myth worthy?

Scott D. Davilla davilla at 4pi.com
Tue May 20 18:02:52 UTC 2008


>  > It actually handles more content under Linux than OSX. A common myth
>>  is that OSX on the AppleTV uses the GPU for h.264 decode assist and
>>  it does not (it could), just GL and not quartz accelerated GL. If it
>>  had GPU decode assist, then it easily could do 1080p h.264
>>  decode/display.
>>  
>
>Interesting, I was under the impression the OS X Nvidia drivers had some
>form of PureVideo style hand-off in them... if it can brute force 720p
>H264 (and apparently SCART via a hack for SD TV connection) that's
>impressive.

Nope, nothing with GPU decode that I have seen. Even higher end Apple 
boxes don't do GPU assisted GPU h264 decode, it's quartz and GL all 
the way.

A composite output is trivial, it comes out one of the component RCA 
connectors. Just did that the other day for kicks. Works just like 
the AppleTV OS composite hacks for both NTSC and PAL. S-Video might 
be possible with the correct dual RCA to S-Video. I should try that 
just to see if it works, if composite is sent out one component RCA 
connectors does S-Video come out two? Maybe.

All Apple 720p trailers are no problem with pure CPU and no 
skiploopfilter. I've tried some high--bit rate 720p examples from 
Mammoth (need the skiploopfilter) and they are fine. A 1 GHz 
Pentium-M is approximately similar in cpu performance as a 2.2 GHz P4.

>I'm assuming 'regular' h264 and not PAFF'd?

Give me some h264 sources and I'll be happy to test them.


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