[mythtv-users] XvMC, fine for HD but SD hits "prebuffering pause"

Daniel Walton dwalton at cisco.com
Sat Sep 23 03:27:37 UTC 2006

I figured out a work-around.  If I use "Seperate video modes for GUI and TV
playback" so that I drop my resolution from 1920x1080 to 720x480 for playing SD
recordings then I can play a SD recording with XvMC without any problems.
Something about the combination of XvMC and forcing myth to up the resolution
was causing the prebuffering pauses.


On Thu, 21 Sep 2006, Daniel Walton wrote:

> I'm using myth v0.20 with a nvidia FX5200 video card and Athon XP 2800.  When I
> enable XvMC (Standard XvMC) any HD show will playback fine but SD shows stutter.
> When playing a SD show the frontend log shows:
> 2006-09-21 22:56:33.305 NVP: Waiting for prebuffer.. 0 ADADDLAL
> 2006-09-21 22:56:33.340 NVP: prebuffering pause
> 2006-09-21 22:56:33.340 NVP: Waiting for prebuffer.. 0 AALADdAL
> 2006-09-21 22:56:33.373 NVP: prebuffering pause
> 2006-09-21 22:56:33.373 NVP: Waiting for prebuffer.. 0 AADAAdLL
> 2006-09-21 22:56:33.406 NVP: prebuffering pause
> 2006-09-21 22:56:33.407 NVP: Waiting for prebuffer.. 0 LADAAADL
> 2006-09-21 22:56:33.440 NVP: prebuffering pause
> I've tried all the suggestions from the XvMC wiki "Prebuffering Pause or stutter
> with Nvidia" section.
> I don't neeed XvMC for playing back SD shows, it is just a pain to have to turn
> it on/off as I go back and forth between SD and HD recordings. Is there a way I
> can configure myth to only use XvMC for HD shows?
> thx
> Daniel
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