[mythtv-users] Possible XvMC prebuffering issues solution?

[Tom Lichti]

Michael Tiller wrote:
> 
>     I also just found a utility that is supposed to generate valide VESA
>     modelines based on resolution and refresh rate. Search your system
>     for a
>     command called 'gtf'
> 
> 
> I came across another utility (called ctf or cvt or something) that does 
> something similar.  I really don't understand much of this, I'm pretty 
> confused. :-(

I'm not much better off than you... :)

> 
> Isn't the modeline used by X to decide how to generate the low level 
> video signal?  How does this affect playback in Myth?  It seems like 
> Myth should be completely isolated from what is going on at the chip 
> level on the video card?!?  Of course, I'm pretty ignorant so what do I 
> know.

Myth needs to sync the video, and if the video refresh is close to the 
source refresh, it seems to make prebuffering pauses go away, presumably 
because frames are coming in as fast as they go out.

> 
> Also, how do you specify interlace or not?!? (which I see in some 
> modelines)  Do I need to specify it?
> 
> My head hurts... :-)
>

Me too.

Tom