[mythtv-users] HDTV performance in 0.18

[Brandon Beattie]

MythTV is often compiled with no support for MMX or anything more than
pentium pro optimization.  If you didn't enable processor specific
optimization and mmx, and opengl when doing a ./configure then this
could have the bad effect.  I haven't noticed much if any CPU change
between .17 and .18 (Granted I run out of CVS) so I'd check that first.

--Brandon

On Mon, Apr 18, 2005 at 03:58:31PM -0400, David Wood wrote:
> Does anyone find it strange to not have enough horsepower to render HDTV 
> in 0.18 on an Athlon XP 3000+ with 1GB of RAM? (Caveat: this is rendering 
> to 800x600 24-bit S-Video on an fx5200.) XV and OpenGL work, renderaccel 
> is true, AGP functional, and by the way, xine can play HDTV with Xv no 
> problem.
> 
> I'm using libmpeg2 and suid/realtime, and the system can just _barely_ 
> handle it without deinterlacing. It's pegged at 95% CPU, and still drops 
> occasional frames. If I turn on deinterlacing, then it's real bad, 
> dropping frames every few seconds.
> 
> As before, toggling libmpeg, realtime, and opengl appear to have zero 
> effect on performance, despite log output from the frontend suggesting 
> they're working.
> 
> I keep finding references to people who are doing HDTV with 2100's and 
> 2400's and so forth. I wonder what the difference is - rendering to a 
> different screen resolution or color depth perhaps?
> 
> Saving grace is that in 0.18 XvMC finally works, almost. I still get ugly 
> flicker and stutter from the OSD, and so far am averaging about 1 
> hard-lock (reboot required) per day... A major improvement.
> 

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