Hi ivtv-users.... If you could take 5 minutes to look at my problem I'd very much appreciate it. I'm at my wit's end.
I posted here about several weeks ago with no response. Long story short I've spent the last several weeks pulling my hair out over an image quality issue on my new MythTV backend. I've checked signal strength around the house, been in my attic checking if cable splitters or co-ax connectors are at fault, and even moved my PVR card back to my windows machine to look for changes. Firstly, have a look at these two videos: http://www.internetgenealogy.com/ivtv/ivtv-0.8.1.mpg http://www.internetgenealogy.com/ivtv/ivtv-0.6.3.mpg The first is from my new PVR setup, Linux 2.6.18.2 and ivtv 0.8.1. Look for the ugly contrast flicker on solid coloured backgrounds. It helps to zoom in. It's difficult to see at first, but once you notice it, it's always there and annoying. The second clip is from the exact same machine, but from a LiveCD version of Slax I made months ago using ivtv 0.6.3. Look at the solid coloured backgrounds. The contrast flicker is gone. Note also that Homer and friends are more washed out. Homer is more pale than yellow in the second image. Both of these videos are a cat /dev/video0 > file.mpg (I'm not using MythTV to record the image), so the only differences should be the kernel version and modules, the ivtv version, and the PVR drivers used in v4l. I've tested the card in a different machine, using both WinTV2000+XP and Slax+ivtv 0.6.3, and didn't see the contrast issues. The issues only seem to appear with my current kernel compile, ivtv 0.8.1. (and previously 0.8.0) At this point, I'd love to get rid of the contrast flicker even if it means washing out the image somewhat. Can anyone give some hints on useage of ivtv-ctl or v4l2-ctl on how to make the first image look more like the second? Is there some line of investigation I should persue? Should I attempt downgrading my kernel on my server and downgrade to an earlier (or later) version of ivtv to see if it will help? Will the output of any particular command be useful in diagnosing the problem? Any advice will be appreciated. Thank you for your time. Trevor Bradley Surrey, B.C. _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
