[mythtv-users] On video w/mostly black,

[ttempl-myth]

Just wanted to chime in that I'm experiencing the same issue.  Stutter on
mostly black or mostly white screens during mythtv playback.  Both in LiveTV
and recorded programs, nothing else going on while recording. Pausing makes
no difference in LiveTV.  No messages from myth or ivtv. Seems to be in the
recorded file as it happens at the same place everytime on playback.  Yet,
Mplayer/Xine/Windows Media player all play back the file fine.  Perhaps they
just handle the corrupted mpg better?

It was quite sever on my system until, of all things, I reset my contast
settings back closer to default.  I know that sounds strange, but I did have
my contrast set to around 36-38% and some shows that weren't even that dark
were chopping.  For example X-play on techtv would start studdering on just
about every game segment they showed, and a night scene in a movie I was
watching was pretty much a slide show.  I actually stumbled across the
contrast thing during that movie.  I just cranked the contrast/brightness
for the heck of it and it smoothed out; put thing back down and it was
choppy.  I think I set things to 48% and then up the brightness some to
compensate, and things are pretty good now.  Just the occasional studder on
fades for the most part.  Haven't tried going higher than that to see how
things go.

Anyway, I'd be curious to find out the contrast/brightness settings of
others and to see if it worsens for others at lower contrast settings.  I
don't know that will really tell us, but maybe it would give something for
the ivtv or myth guys to work with...

Other pertinent info...
Asus Pundit
Celeron 2.2
512 MB RAM
Seagate Barracude 7200 8M cache
Ebay OEM PVR-250 using svideo in.
KnoppMyth r4(same results with Mandrake 9.1 and Gentoo)

Tim


----- Original Message ----- 
From: <wishbone at h4b.org>
To: "Discussion about mythtv" <mythtv-users at mythtv.org>
Sent: Saturday, November 22, 2003 10:02 PM
Subject: Re: [mythtv-users] On video w/mostly black,


> Yes...  watching the file directly with mplayer and windows shows no
> problems at all.  Which I actually hadn't tested yet.  I was actually
refering
> to useing mplayer to watch /dev/video directly and it doesn't have any
> problems.  However, when I watch the recorded show with myth it studders
in the
> same place every time.  It appears particularly random, although it does
seem
> to happen more often when there is a lot of black on the screen.
>
> I am not watching a pre-recorded program when anything else is recording
or
> watching live-tv.
>
> I've tried pausing live tv and it doesn't help at all.  Even rewinding,
but
> like I said it seems to appear exactly in the same spot every time.  Low
motion
> VBR problem maybe?  (yes I'm reaching here for anything)
>
> no error or otherwise strange messages from mythbackend or frontend logs.
>
> DMA is always a possible solution, but I see this regardless if I'm
watching a
> show currently being recorded, or just watching an old recording.  I've
tested
> this with NOTHING else happening on the box.
>
> Hope that helps get us closer =T  I'll turn on extra logging options if it
will
> help?
>
> thanks again,
> joshua
>
>
> On Sat, Nov 22, 2003 at 10:35:10PM -0500, Chris Pinkham wrote:
> > > It is in the recorded file and why wouldn't it show up in live tv?
Isn't live
> > > tv "recorded" and you watch the ringbuffer file?  Anyway mplayer works
fine and
> > > you can watch the live stream /dev/video without any problems.  I'm
not sure
> > > about the other person who just mentioned this problem but I only seem
to be
> > > having the problem in myth.  Anyway, the studders are ending up in the
recorded
> > > files as well and not just in "live" tv.
> >
> > So you ran mplayer on one of the Myth recorded files and mplayer
stuttered at the
> > same point that Myth did when watching the file?
> >
> > Couple questions:
> >
> > Are you watching a pre-recorded program while another is recording?
> >
> > Does the problem happen if you pause LiveTV for a few minutes and then
unpause
> > it and continue watching?
> >
> > Are there any messages printed out in the window you ran mythfrontend
from or
> > on the backend?  How about the syslog, anything there from ivtv?
> >
> > I'm wondering if you're running into problems with reading/writing the
mpeg2
> > files at the same time or maybe dma problems or something.
> >
> > -- 
> >
> > Chris
> >
> -- 
>
> *<|:oþ
> "Beware the Jabberwock, my son!
> The jaws that bite, the claws that catch!
> Beware the Jubjub bird, and shun
> The frumious Bandersnatch!"
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users