[mythtv] testing mythtv-vid branch - questions & problems

Matt Doran matt.doran at papercut.biz
Fri Jun 29 07:17:54 UTC 2007

I asked the following on the user's list with no response. Given that 
it's branch, the dev list might be more appropriate .... and I've 
submitted a couple of patches.  :P

-------- Original Message --------
Subject: 	[mythtv-users] mythtv-vid branch questions / problems
Date: 	Thu, 28 Jun 2007 23:57:28 +1000
From: 	Matt Doran <matt.doran at papercut.biz>
Reply-To: 	Discussion about mythtv <mythtv-users at mythtv.org>
To: 	Discussion about mythtv <mythtv-users at mythtv.org>

Hi all,

I've been running SVN trunk for a while now with no problems.  After 
seeing a number of positive reports I wanted to try out the new 
mythtv-vid branch ... so switched over to the branch, recompiled and 
installed the new version. 

I really like the new playback profiles!  It makes it easy to switch 
between various video rendering/deinterlacing/etc options ... which is 
good for testing.  However I'm a little overwhelmed by the options and 
terminology and have some questions.

Firstly, what settings are the equivalent of the old trunk xv renderer, 
and OSD renderer?  Is it xv-blit and softblend respectively?  I've been 
using Standard, XV, Bob on trunk .... and when I use these settings on 
the vid branch the output is the same as it was on trunk.

When I switch to the "opengl" renderer things are not so good.  I get a 
huge amount of tearing .... the video looks awful with any panning.  It 
seems to happen no matter what deinterlacer or OSD renderer I chose.   
What combinations of decoder/renderer/OSD/deinterlacer are recommended 
for the best results?

Also when I enable any of the open GL deinterlacers, I get the following 
in the logs ... does this indicate a problem?

    2007-06-28 23:45:15.560 VDP: GetFilteredDeint() :  ->
    2007-06-28 23:45:15.564 FilterManager: failed to load filter
    'opengllinearblend', no such filter exists
    2007-06-28 23:45:15.564 Couldn't load deinterlace filter
    2007-06-28 23:45:15.564 Using deinterlace method
    2007-06-28 23:45:15.564 SetVideoRenderer(opengl)

Others have good success with the OpenGL renderer, so I'm wondering what 
I'm missing.    I'm using an onboard Nvidia 6150 video board... is this 
card powerful enough?  What boards have others had success with?

I'm using version 9631 of the nvidia drivers, and a fairly standard 
Ubuntu Feisty system (AMD X2 3600+, 1GB RAM).

Thanks in advance,

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