[mythtv-users] Re: g200 MJPEG decode problem in mplayer and mythTV(but not lavplay)

[Jamison Wilde]

I figured out the problem.

I updated mgavideo to 01.1b(added bt484 to kernel) and
mplayer to the latest .9 release.  I also went through
and cleaned out all extraneous modules.

Thanks.

Jamison


--- Jamison Wilde <jamison_wilde at yahoo.com> wrote:
> (This is a resend, since my join confirm hadn't gone
> through yet.)
> 
> I have RTFM and googled for a couple of days now
> trying to figure out this problem. 
> 
> I have a Via EPIA ME-6000 mainboard (c3 600mhz),
> 256MB, with a g200-TV 8MB PCI card installed, gentoo
> 2.4.20, kde3.1.1, mgavideo 0.1.0. DMA is on. 
> 
> I can capture using lavrec and play back the
> resulting
> AVI file in lavplay with no problems.  But when I
> try
> to play back the same file in mplayer 0.9.0rc5, the
> output is corrupt. 
> 
> (Lavrec and MythTV hw MJPEG capture uses 20-30% of
> cpu. Lavplay uses 100% of cpu but is smooth output.)
> 
> What I see in mplayer is: Every second or so the
> full
> frame is redrawn, sometimes horizontally skewed, but
> in the upper left of the screen, you can see the
> full
> frame rate video (about 20 pix high by 100 pix wide)
> is playing.  Just to the right of this (same 20pix
> high) it starts to look like garbage that is
> changing
> very quickly.  It looks like it's playing all the
> data
> but it keeps getting corrupted. 
> 
> CPU is only 40% or so while this is happening, so
> that
> shouldn't be a problem. I've also tried various
> screen
> depth and size settings.
> 
> The reason I want to figure this out for mplayer is
> that I see the same output when I use hw mjpeg
> output
> in mythtv 0.8. I'm hoping someone can point me in
> the
> right direction.
> 
> Could this be a problem with Xvideo or ffmpeg? mga
> or
> mgavideo? (I saw one post on ffmpeg-devel that
> sounded
> similar, but of course no helpful responses).
> 
> If I do mplayer -no xv, I see the same problem, so
> maybe it's not xv.  I have also tried various
> decimation/quality settings in lavrec, same problem
> on
> playback in mplayer.
> 
> I am not trying to do TVOUT (yet; figure one problem
> at a time is enough). 
> 
> Any help would be greatly appreciated.
> 
> Thanks.
> Jamison
> 
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