[mythtv] Playback Problems

Hamish Moffatt hamish at cloud.net.au
Thu Dec 2 12:20:00 UTC 2004


On Thu, Dec 02, 2004 at 11:25:07AM +0000, Ed Wildgoose wrote:
> Flo Kohlert wrote:
> >I upgraded to latest cvs as of today. Now my machine is absolutely unable 
> >to
> >play any stream without awful choppiness. P3-700/256mbram/gf4mx
> 
> Check that your screen refresh rate is exactly 50Hz or you will have 
> problems because the opengl sync is syncing to that

Isn't some clock frequency mismatch inevitable? There are several clock
sources which aren't synchronised. During playback, you have to sync to
either audio or video and those have their own clock sources.
During recording you either have software-controlled sampling (for
software encoding eg bttv), or it's controlled by hardware (eg
PVR-x50), or by the television station (DVB, ATSC). When watching
live TV, you have audio, video and recording all mismatched.

Too bad I can't lock my video and audio playback to the television
station's transmit clock, because they usually use very accurate
references.

Hamish
-- 
Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>


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