[mythtv-users] 0.19, VIA, XvMC, Ezra/i586 - video corrupted - image enclosed

Fri Aug 4 00:35:06 UTC 2006

Jules,

I have an EPIA M-9000 (Ezra/i586) Mythbox running 0.19. It's a frontend
only, but it is using XvMC from Kelkoo as you describe above. If I get
another capture card it'll be a slave backend again. (Which is what it was
for the longest time running .14 without the libXvMC stuff.) So it should be
be possible for your machine to give you adequate performance although when
I was running without libXvMC I had to limit my capture resolution to 480 x
480 otherwise playback response was pretty bad. (I use PVR-250 cards.)

I wonder if part of the issue is the difference in TV standards?

...Kevin

On 8/3/06, Jules Gosnell <jules at coredevelopers.net> wrote:
>
>
> Thought I would repost as I'm still seeing this sort of thing on _some_
> recordings when XvMC is enabled:
>
> http://www.gosnell.org.uk/tmp/00032.jpg
>
> I'm living without XvMC, but it's not ideal - I have to put up with
> stuttering now and then.
>
>
> I have just upgraded the box to the latest packages from
> washington.kelkoo.net/epia and atrpms (see below).
>
>
> but, still no better.
>
> Underneath this it is running a pretty much vanilla FC4 with all updates
> from standard repos applied.
>
> The only unusual thing about my setup is that the cpu is an Ezra and
> therefore an i586 - this has caused problems in the past.
>
> Does anyone have an Ezra running successfully with XvMC enabled ? If so,
> I would be very interested to compare notes.
>
>
> I've just done a little more testing and found that the problem may be
> related to the channel - e.g. ITV2 and More4 (PAL, UK) seem to be the
> only channels on which I regularly record which produce recordings which
> do not demonstrate this problem (90% of the time). All other channels
> that I use generate recordings that I are not watchable with XvMC. Might
> different channels braodcast in slightly different formats, some of
> which work better with my hard/software ? any ideas ?
>
>
> Thanks for your time,
>
>
> Jules
>
> kernel-2.6.17-1.2142_FC4
> libmyth-0.19-130.fc4.at
> mythbrowser-0.19-126.fc4.at
> mythcontrols-0.19-126.fc4.at
> mythdvd-0.19-126.fc4.at
> mythflix-0.19-126.fc4.at
> mythgallery-0.19-126.fc4.at
> mythgame-0.19-126.fc4.at
> mythmkmovie-1.1.4-5.fc4.at
> mythmusic-0.19-126.fc4.at
> mythnews-0.19-126.fc4.at
> mythphone-0.19-126.fc4.at
> mythplugins-0.19-126.fc4.at
> myththemes-0.19-106.at
> mythtv-0.19-130.fc4.at
> mythtv-backend-0.19-130.fc4.at
> mythtv-frontend-0.19-130.fc4.at
> mythtv-setup-0.19-130.fc4.at
> mythtv-suite-0.19-59.at
> mythtv-theme-abstract-0.20040910-2.at
> mythtv-theme-MediaCenter-0.17-4.at
> mythtv-theme-photo-4-6.at
> mythtv-theme-ProjectGrayhem-1.7-1.at
> mythtv-theme-purplegalaxy-0.20031214-3.at
> mythtv-theme-Retro-0.20051208-1.at
> mythtv-themes-0.19-130.fc4.at
> mythtv-theme-sleek-0.35-2.at
> mythtv-theme-visor-0.16.2-5.at
> mythvideo-0.19-126.fc4.at
> mythweather-0.19-126.fc4.at
> mythweb-0.19-78.at
> xine-0.99.4-0.lvn.3.4
> xine-lib-1.1.1-0.lvn.3.4.ucr.1
> xine-skins-1.8-0.lvn.1.4
> xorg-x11-6.9-0.FC4.ucr.12
> xorg-x11-deprecated-libs-6.9-0.FC4.ucr.12
> xorg-x11-deprecated-libs-devel-6.9-0.FC4.ucr.12
> xorg-x11-devel-6.9-0.FC4.ucr.12
> xorg-x11-doc-6.9-0.FC4.ucr.12
> xorg-x11-font-utils-6.9-0.FC4.ucr.12
> xorg-x11-libs-6.9-0.FC4.ucr.12
> xorg-x11-Mesa-libGL-6.9-0.FC4.ucr.12
> xorg-x11-Mesa-libGLU-6.9-0.FC4.ucr.12
> xorg-x11-sdk-6.9-0.FC4.ucr.12
> xorg-x11-tools-6.9-0.FC4.ucr.12
> xorg-x11-twm-6.9-0.FC4.ucr.12
> xorg-x11-xauth-6.9-0.FC4.ucr.12
> xorg-x11-xdm-6.9-0.FC4.ucr.12
> xorg-x11-xfs-6.9-0.FC4.ucr.12
> xorg-x11-Xnest-6.9-0.FC4.ucr.12
> xorg-x11-Xvfb-6.9-0.FC4.ucr.12
>
>
> Jules Gosnell wrote:
> > http://www.gosnell.org.uk/tmp/00032.jpg
> >
> > Last night I did a completely clean install of FC4 onto my VIA Ezra. I
> > added yum configurations for Kelkoo (Epia Unichrome related RPMs), AT
> > (Myth RPMs), and Livna (Xine RPMs) and did a complete update of the
> > system, including MythTV-Suite and Xine.
> >
> > The relevant pieces of my install now look like this :
> >
> > xorg-x11-6.9-0.FC4.ucr.5
> > mythtv-suite-0.19-57.at
> > mythtv-frontend-0.19-124.rhfc4.at
> > libmyth-0.19-124.rhfc4.at
> > kernel-2.6.15-1.1833_FC4
> > xine-0.99.4-0.lvn.3.4
> > xine-lib-1.1.1-0.lvn.3.4.ucr.1
> >
> > I no longer seem to need an /etc/X11/XvMCConfig or package, or special
> > kernel module - I think all of this is now built into the new kernel and
> > x server releases.
> >
> > I have not rebuilt MythTV - I may try that today.
> >
> > I had 0.18/FC3/XvMC running fine - but 0.19 offered tempting
> > improvements in so many areas...
> >
> > After I upgrading 0.18->0.19 (still on FC3), I was seeing the same form
> > of corruption when running with 'VIA XvMC' decoding, plus a different
> > sort of corruption when playing the same recording with 'Standard'
> > decoding (Colours seemed washed out of video, then a few brighter
> > colours like orange were striped across the video and smeared upwards
> > and to the right slightly).
> >
> > I figured I would be in better company if I moved from FC3->FC4 - now
> > 'Standard' decoding seems fixed - but my 1ghz cpu cannot keep up.
> > Unfortunately, 'VIA XvMC' playback still results in garbage being
> > displayed on large horizontal sections of the screen. Pausing or
> > changing position in the stream tends to corrupt the whole screen.
> >
> > I've noted two other things that may help:
> >
> > - some MPEG2 files (recorded on both 0.18 and 0.19) are not affected and
> > play perfectly - XvMC decoding is much improved over 0.18 for these :-).
> > Unfortunately, these recordings seem to be the exception.
> >
> > - the files that cannot be played cleanly on VIA/MythTV playback fine on
> > the same machine using 'xine -xxmc' (load is reduced to 15-20%) and on
> > another non XvMC capable machine - so the files themselves are not
> > corrupted.
> >
> > many issues that I have had with this box come down to the fact that it
> > is an i586 - an unusual arch - so that may be worth bearing in mind.
> >
> > If anyone has any ideas, patches, things that they would like me to try
> > - just shout. I've fiddled with various settings, but to no avail. I may
> > try completely removing my ~/.mythtv in the hope that I have some
> > historical setting that is causing trouble.
> >
> > Thanks for MythTV !
> >
> >
> > Jules
> >
>
>
> --
> "Open Source is a self-assembling organism. You dangle a piece of
> string into a super-saturated solution and a whole operating-system
> crystallises out around it."
>
> /**********************************
>   * Jules Gosnell
>   * Partner
>   * Core Developers Network (Europe)
>   *
>   *    www.coredevelopers.net
>   *
>   * Open Source Training & Support.
>   **********************************/
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-- 

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-- Albert Einstein (1879 - 1955)
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