[mythtv] Playback too fast

[Isaac Richards]

On Friday 31 March 2006 09:41, Greg Stark wrote:
> Doug Larrick <doug at ties.org> writes:
> > Greg Stark wrote:
> > > I've tracked down the cause of the problem I've been having with
> > > playback that's too fast. It seems the DRM VBlank interface doesn't
> > > work properly on the ATI drivers when you're in merged framebuffer
> > > mode.
> > >
> > > But it seems like mythtv is being too trusting here. Instead of
> > > depending entirely on the vblank interface it really ought to use
> > > usleep for the bulk of the sleeping then use vblank just for the actual
> > > synchronization.
> >
> > Should be easy enough to implement.  The video sync system is designed
> > to be easily extended with new methods.  Why don't you give it a shot?
>
> Well actually I was thinking the right thing to do would be to kind of
> merge the three methods. So all three would do usleep and then the three
> options would be just busywait/DRM/GL for the actual synchronization.
>
> Or perhaps the usleep should be happening before the videosync method is
> even called from NuppelVideo itself.

A usleep isn't accurate enough for that.

Isaac