[mythtv-users] Playback vid corruption with 1080i (with pics)

Glen Dragon gad at jetcom.org
Thu Jun 23 12:27:21 UTC 2005

I'm still seeing the problem that I reported a week or so ago.  I took 
some pictures to show the effect. Hopefully someone knows something. 
Interestingly enough it is also causing the same effect on the OSD.
Pics:     http://www.jetcom.org/gallery/dragon-myth
(There is some bluring due to difficulties in taking the picture, as I 
didn't have the tripod around. It really does look like that tho)

I've tried different nvidia drivers (7664, 7167, 6629) no difference. 
I'm not sure what else to try.

-----original post-------

I see wierd horizontal striping every 1/2 an inch or so.  There is a 
jagged green area on the left (and covering parts of the picture). It 
sort of makes the picture shimmer. It's semi-watchable if you can 
ignore the effect (aka it doens't obstruct the picture).

This only appears on my NBC broadcasts (and PBS too i think). I think 
this means it's on 1080i broadcasts.  Fox & ABC are crystal clear. I 
don't get CBS right now. I believe that it also appears on upconvered 
material, ie the news was the same way last night.  I only see it on 
one of my frontend which happens to have an amd64 using 64bit gentoo.  
So I'm assuming that it has something to do with that. I'm also 
assuming that it's related to the fact that he signal is interlaced. 
The recording itself is fine, ie I can play it upstairs on a different 

The machine is an AMD64 3500+, nvidia fx5300 connected DVI to a 2005FPW 
flat panel.  I have also had this problem connected to a 50+ rp-lcd tv. 
I have tried various combinations of opengl vsync and various deints 
(kernel/bob). Not using xvmc (never got it to work on this machine), 
processor utilization is ~50-60%

This *has* worked beautifully before. I don't know why/how it has 
changed.  At one point I believed that it was mmx related, but now it 
seems to be independent. I have tried actively disabling mmx in the 
config. The only thing this now accomplishes is to increase my cpu util 
 > 90-100%. I've seen this effect using various cvs builds on this 
machine since before 0.18

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