[mythtv-users] Difference in CPU usage mplayer vs MythTV mplayer

[Brian McEntire]

Hi all -
Can anyone explain the difference in CPU usage between playing back a 
recorded show inside and outside of Mythfrontend?

As far as I can tell, Mythfrontend uses mplayer to play back. However, the 
CPU speed and overall performance is drastically different whether I run 
inside mythfrontend or not. I they are using the same mplayer binary.

>From the command line, as mythtv user, mplayer -fs -zoom -vo xv <file> ... 
uses about 35%-40% of CPU

>From inside mythfrontent, playback of the same recording uses from %55-%85 
of CPU and averages about %65. I believe I am using the exact same mplayer 
command line options as used by MythTV within mythfrontent.

I have even SSH'd in and run myplayer -fs -zoom -vo xv (with display set to 
:0) so that mplayer pops up over top of myfrontend, to make sure it wasn't 
just a resource usage thing with mythfrontent. Even with mythfrontend 
running, top still shows only 35%-40% CPU usage when I start mplayer from 
the command line.

Where is the extra overhead coming from?
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