[mythtv] XvMC studdering

[Andy Foster]

Just wanted to share my experiences and see if anybody was in the same place
as me.

When seeking, video/audio stutter for about 2-3 seconds. After that,
playback is fine. As mentioned in other threads, it seems to be related to
the osd as if I hit seek/esc quickly in succession it does not appear to
happen.

Doubled the ringbuffer (~19000),
Interlace disabled,
MPEG2 decoder Standard XvMC,
Opengl sync disabled,
Rtp threads enabled,
Video as timebase disabled,
Extra audio buffering disabled,
Aggressive audio buffering disabled,
Seek to exact frame disabled

I've tried tweaking all these settings but they don't seem to make a
difference - stutter seek is still there. Also tried the chromakey osd (and
associated xorg/mysql setting) without any luck.


On 1/18/06, Todd Ignasiak <ignasiak at gmail.com> wrote:
>
>
>
> On 1/17/06, Todd Ignasiak <ignasiak at gmail.com> wrote:
> >
> >
> >
> > On 1/17/06, Dave Just < justifiably at cwazy.co.uk> wrote:
> > >
> > > Could you (or anyone else who has managed to get it working well)
> > > share the settings that you use: inc extra audio buffer, aggressive
> > > sound card buffering and esp the RingBuffer size compared with RAM on
> > > the machine?  I'm still finding it hard to get completely smooth
> > > playback on my system (XP 1900, GeForce MX 440, FC4/2.6.14, NV 7676).
> >
> >
> >
> > My Playback settings are:
> >
> > Deinterlace Playback ENABLED, set to "Bob (2x framerate)"
> > Preferred MPEG2 Decoder: Standard XvMC
> > OpenGL Vertical Sync for timing DISABLED (this caused problems for me
> > when enabled with a previous SVN release.  I have not tried it with this
> > release)
> > Realtime Priority threads ENABLED
> > Use video as timebase ENABLED
> > Extra audio buffering ENABLED
> >
>
> Also - I didn't modify my ringbuffer from the original settings.
>
> On 16 Jan 2006, at 20:39, Todd Ignasiak wrote:
> > >
> > > > I hadn't updated my SVN version in a few weeks, and had turned off
> > > > XvMC because of a few glitches.     So, I updated it yesterday and
> > > > turned XvMC back on.    My initial tests were excellent,  very good
> > > > XvMC playback, no stuttering, perfect playback on 1080i and 720p
> > > > material.  (In the past, I had been getting some stuttering on 720p
> > > > when the OSD came up).
> > > >
> > > > Maybe some of the changes that Kevin mentioned have helped
> > > > this..    My system is: Gentoo x86-64, kernel 2.6.14, NVidia driver
> > > > 7676, FX5200 video card,  latest MythTV svn as of last night,
> > > > HD3000 and FusionHDTV3 QAM cards.
> > > _______________________________________________
> > > mythtv-dev mailing list
> > > mythtv-dev at mythtv.org
> > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
> > >
> >
> >
>
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