[mythtv] Ticket #6938: smoother playback

[David Engel]

On Tue, Sep 01, 2009 at 07:38:01AM +1000, Mark Spieth wrote:
> >Anyway, if no one objects to saying this "fixes jerky timestretching",
> >I'm willing to commit it.  IOW, it's as much a bug fix as it is an
> >enhancement sine we are in a feature freeze.
> 
> I cant vouch for the other vsync modes.
> gigem said it was worse with RTC sync method and vdpau, though Im
> not sure why that would be.

gigem == me, and I said "If anything, [...] ever so slightly more
jerky."  IOW, any difference was barely noticeable, and for all I
know, your change might even look smoother if I tried again it was
that close.

> be nice to get some other config tests too for reasonable coverage.
> or put in a config flag for mode selection so it doesnt break
> anything worst case.

To let others speak up is why I just didn't check it in.  I'd really
rather not add another config option unless it's absolutely needed.
We've got too many already.

> but tearing means I got rid of RTC mode long ago.

If you use RTC timing, you need to enable "Xv sync to VBlank" in
nvidia-settings to get rid of tearing.  The downside of using RTC
timing is the video can be 16ms out of sync with the display and
audio.  It's better than tearing, though, when OpenGL timing doesn't
cut it.

David
-- 
David Engel
david at istwok.net