[mythtv] fullscreen/window mode

Chris Palmer mythtv at zencow.com
Mon Apr 21 13:54:58 EDT 2003

Wally Wallace wrote
> The reason I ask is I am trying to troubleshoot my frontend. 
> I have very high cpu usage and I can't figure out why. My cpu is a
> celeron 1.2 on a sis630 chipset. Mythtv is using xv. I have dri and drm
> enabled. The network is 100mb full-duplex. I can play divx or mpeg's
> through mplayer with only %25 cpu usage. When I run myth to watch a
> recording or livetv recorded at 640x480 myth uses about 70% cpu in 4 or
> 5 processes and X uses 20-30% the rest. It is unwatchable because
> the audio skips every other second and the video drops maybe 1/5
> frames. 480x480 is barely watchable, but cpu usage is still near
> 100%. This just seems wrong to me, shouldn't my system handle
> mythfrontend better? What can I do to continue troubleshooting?
> Thanks

I'm assuming you're using MPEG4 compression, so first, check your 
MPEG4 settings and make sure they are at their defaults:
  maximum quality: 2
  minimum quality: 15
     maximum diff: 3

Next, you might try reducing your resolution even more.  On 
my P-III/866, I record at 352x480 MPEG4, bitrate: 3300 (scaled) 
and use about 70% cpu.  I also do not use that machine for the 
frontend... it's used for the backend only (saving me about 
20% cpu).

What window manager are you using for X?


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