[mythtv] H.264 and mythtv

Isaac Richards ijr at case.edu
Wed Aug 31 17:58:36 UTC 2005


On Wednesday 31 August 2005 01:48 pm, Michael T. Dean wrote:
> MacOS X on top-of-the-line PPC is able to decode H.264 at 1080i at 24-30fps
> iff it's QuickTime H.264.  Similarly, Windows machines have a hard time
> with QuickTime H.264, but perform much better with WMV H.264. (Perhaps
> some optimization or even reverse-optimization for the platform's
> preferred codec?)

My 4400+ can play back Apple's 1080p (24fps) trailer for Serenity perfectly in 
Myth. =)  CPU useage is _very_ close to getting maxed out, though.

> For H.264 in high def, we really need dedicated silicon to do the
> decoding--especially if the CPU is doing other things.  The ATI R520
> will have dedicated silicon to handle H.264 decoding (to be released
> sometime in October, probably), but whether there will be support for it
> in the Linux drivers (considering today's ATI drivers don't even have
> XVMC support) and whether there will be a standard API for using it
> (don't know of any at this point), is unknown.  NVIDIA cards will not
> have the H.264 decoding built in.

From what I've read, the GF7 series will/does have decode accel as well.

Isaac


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