[mythtv-users] Re: Screen Flicker Issues. Frustrating!

David Whyte david.whyte at gmail.com
Tue Nov 9 11:23:52 UTC 2004


Dave,

How did you go with this?  I too have flicker but it is on a DVB-T
card, I have no idea where to start!

Cheers,
Dave


On Thu, 4 Nov 2004 10:05:49 -0500 (EST), David Bosiljevac
<dave at sanman.ca> wrote:
> 
> If it turns out to be something this simple, I'm going to go nuts!
> 
> I'll be happy that it's working correctly, but I'll still go nuts.
> 
> I'm NTSC, so I found my ivtv driver and my Myth was set to 480x480.  I've gone in
> and changed both the ivtv driver and Myth to 720x480, so I'll see what happens now.
> 
> Thanks,
> 
> --db
> 
> ------------
> 
> 
> 
> 
> In your profiles make sure your resolution is set correctly, for
> example in the UK its 720x576. There was a problem wherby the standard
> resolution would cause screen flicker.
> 
> On Wed, 3 Nov 2004 22:40:35 -0500 (EST), David Bosiljevac
> <dave at sanman.ca> wrote:
> > Hi all,
> >
> > I've been having a screen flicker issue with my Myth setup since I got it up and
> > running a couple of months ago. The flicker happens whether I watch live TV or in
> > recorded programs. It also exists in any exports that I make to DVD or SVCD. It's
> > not persistent, but sometimes it gets worse and other times it's not to be seen.
> > (And it's not part of the cable TV signal, as I can watch TV on a regular set with
> > no flickering.)
> >
> > I've tried so many different things, but nothing seems to work. It's just getting
> > frustrating.
> >
> > My setup is as follows:
> >
> > Hardware
> > - AMD XP 3200+
> > - 1 GB memory
> > - Asus A7V880 motherboard
> > - Western Digital 120 GB UDMA hard drive (operating system drive)
> > - 2 x 120 GB Western Digital S-ATA hard drives (striped, RAID-0)
> > - Hauppauge PVR-250 video capture card
> > - Asus Radeon 9200 video card
> >
> > Software
> > - Debian Linux - kernel version 2.4.27 custom compiled
> > - Myth 0.16
> > - ivtv 0.1.9
> > - Hauppauge firmware 1.18.21.22168 (latest non-beta firmware)
> >
> > Here's what I've tried so far to isolate the problem:
> >
> > I tried setting ivtv up with the "No ghosting" option ---
> > Get rid of double vision or image ghosting:
> > no-ghost: test_ioctl --set-codec-params=dnr_mode=0,dnr_temporal=0)
> > --- No luck!
> >
> > Originally, I had the operating system and video capture data on the two striped
> > serial-ATA drives. I went out and bought a regular UDMA drive and threw the
> > operating system on it, and kept the S-ATA drives strictly for the video data.
> > Again, no luck!
> >
> > I downloaded the latest firmware for the Hauppauge card, loaded it, then reloaded my
> > ivtv drivers. Still, no luck!
> >
> > I tried moving the Hauppauge card into a different PCI slot in the system. Alas, you
> > guessed it, no luck!
> >
> > I'm at wits end trying to figure out what the problem could be.
> >
> > I'll see if I can post an example screen capture or video clip of what the problem
> > is. I can't guarantee it though.
> >
> > Has anyone had any sorts of problems like this? I thought it might be hard drive
> > performance, but I don't think that's it (although I'm not ruling it out).
> >
> > Here's my hdparm results:
> >
> > --> operating system drive
> > krusty:~# hdparm -tT /dev/hda
> >
> > /dev/hda:
> > Timing cached reads: 1320 MB in 2.00 seconds = 660.00 MB/sec
> > Timing buffered disk reads: 168 MB in 3.02 seconds = 55.63 MB/sec
> >
> > --> raid drive (myth capture data)
> > krusty:~# hdparm -tT /dev/md0
> >
> > /dev/md0:
> > Timing cached reads: 1380 MB in 2.00 seconds = 690.00 MB/sec
> > Timing buffered disk reads: 238 MB in 3.00 seconds = 79.33 MB/sec
> > krusty:~#
> >
> > ANY help would be greatly appreciated.
> >
> > Thanks in advance!
> >
> > Dave
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
> 
> --
> Regards,
> 
> ~CM
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> 


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