[mythtv] [mythtv-users] Playback performance [all platforms]
nigel at ind.tansu.com.au
Mon Jan 9 23:30:01 UTC 2006
> I notice that the performance of playback seems to be suboptimal.
Indeed, but I don't think it far behind i386?
* Your average PIII 500 can play back MPEG2 SDTV
at the full frame rate if you have Xv support
(i.e. hardware colour space translation)
* My G4 400 can _almost_ do the same thing.
The G4 should be capable of better, but I think
that the MPEG decoding code in avlib is primitive.
There is PPC code there, but I doubt it is as well
optimised as the Pentium code.
Jeremiah did lots of work optimising QuickTime
calls and doing assembler for the OSD translation.
I miss him :-(
Last April, Benjamin Hulley told me about a hack
which opens an interface to the hardware DVD decoding:
To my shame, I haven't had the time to explore, though.
> For example, I captured some HDTV video over firewire using MythTV.
> When I try to play it back using the frontend, it is totally
I have that problem on PCs too. None of my machines
(EPIA M10000, Gigabyte w KM400/AMD XP2400,
various Pentium and Celeron at work) are up to the task.
> However, when I use VLC to play the same file, it looks almost
> perfect, with only barely perceptible jerkiness
Interesting. I will have to experiment myself, now.
Nigel Pearson, nigel at ind.tansu.com.au|"Look at this!
Telstra Dev. Lab, Sydney, Australia | Do you think I put this in
Office:9814 4803 Fax: 9814 4897 | to get better reception?"
Mobile: 0408 664435 Home: 9792 6998 | Batty - Fern Gully
More information about the mythtv-dev