[mythtv-users] XvMC Playback Segfault

[Marc Tousignant]

> Marc Tousignant wrote:
> > I am getting a segfault when trying to use the following XvMC options
> with
> > an nVidia card and Watching TV/Recordings
> > Resolution
> >
> >> = 1280 720
> >
> > Decoder
> >
> > XvMC
> >
> >
> > Video Renderer
> >
> > xvmc-blit
> >
> 
> > At first I thought  the issue was due to opengl-sync being on in the
> compile
> > options so I turned that off, found someone else had a similar issue.
> It is
> > not checked in the playback settings.
> >
> > Anyone know of a fix?
> >
> 
> > XvMC support              yes
> >
> > XvMC VLD support          no
> >
> > XvMC pro support          no
> >
> > XvMC libs                 -lXvMCNVIDIA
> >
> > VDPAU support             no
> >
> > OpenGL video              no
> >
> > OpenGL vsync              no
> 
> 
> Couple of things to try. from far too much time working with xvmc on
> intel and openchrome (but not nvidia)
> The Xvmc code in the Intel driver (pre version 2.6.0) was limited to a
> resolution of 720x480. Nvidia's driver doesn't have that limit, AIUI
> but
> try an SD program just in case the size is a problem.
> 
> 
> Most important test: check that you have the full and correct pathname
> and  filename for 'libXvMCNVIDIA...' in /etc/X11/XvMCConfig. For vdpau
> capable drivers the proper name is the full pathname and filename
> /usr/lib/libXvMCNVIDIA_dynamic.so.1 (which sym-links to
> libXvMCNVIDIA.so.180.51 or whatever). IIRC the full pathname was not
> used for the pre-vdpau version drivers, if you are using an earlier
> driver. According to the README, xvmc is enabled in the vdpau capable
> drivers, but of course, it only works on xvmc capable hardware.
> 
> Other than that, check out the wiki at http://www.mythtv.org/wiki/XvMC
> especially the 'Configuring xorg.conf' section (if you haven't already
> done so).
> 
> Geoff
> 
> 
> --
>          Please let me know if anything I say offends you.
>           I may wish to offend you again in the future.
> 
>           Tux says: "Be regular. Eat cron flakes."
> _______________________________________________

I wasn't the only one having the issue.

#6653
Following patch 20711 I get a segfault in XvMCOSD::CreateBuffer? caused by
changing XvShmCreateImage?() to use MythXDisplay* rather than Display* 

This was fixed by 20738.

Marc