[Mplayer-advusers] Bug? Anomalous CPU usage when playing HDTV clips.

[Reimar Döffinger]

Hi,

> This led me to try the gl drivers again and take a closer look.
> They are buggy, so I've been ignoring them until now.
Well, I'm the maintainer for these, so tell me if you find a bug (but be 
aware that some of their shortcomings are intentional)

> Using the vo gl, CPU usage actually looks pretty sane
> for both 1280x720 and 1024x576 @ 30fps.  mplayer runs 
> between 20% and 30%, X is negligible. But 1280 has 
> broken video, nothing but a white display.  Also, higher
> fps clips do not play at correct speed.
Don't know about those speed issues, but to play a 1280x720 video your 
graphics card must support 2048x2048 textures - which many notebook 
graphics cards probably won't.

> Using the vo gl2, nothing plays at the correct speed.
> mplayer CPU usage is high, but below 60%, so its not 
> due to pegging out the CPU.
Assuming that your maximum texture size is 1024x1024, vo_gl2 will use 
_four_ textures of this size. Especially if your graphics card uses 
system RAM, your memory bus will be simply too slow for this.

Of course those are just guesses...

Greetings,
Reimar Döffinger