OK. After two posts to ivtv-users over a month and no responses, I've finally taken the final step of research and figured out why I was having issues with my ivtv-0.8 setup. I figure if I've managed to figure this out, I should post and share.
The short short version: If you see ugly static, fuzziness, ghosting, or contrast flicker on analog recordings, particularly recordings with clear solid backgrounds, try running: v4l2-ctl -C temporal_filter This returns the value of the PVR's temporal filter setting. If the value returned is 0, try: v4l2-ctl -c temporal_filter=8 And see if that clears up the recording. This problem may only apply to MythTV users (which starts with a default dimension other than 720x480) using ivtv 0.8. The short version: I have a PVR-150. * I am running Slackware Linux with a 2.6.16.2 kernel * I am running ivtv 0.8.1 (and previously 0.8.0) * I get an annoying static, or flicker, or ghosting, or contrast issues on my recordings. * This annoying static is similar to the TV quality I see downstairs. * The static did not appear on a digital clean signal (e.g. DVD-Player, Digital Cable) but did appear on analog cable. * This ghosting did not appear on my old Windows box running SageTV, as if the static were magically cleaned up. * This ghosting did not appear on my old Windows box (same hardware) running a Linux LiveCD boot (Slax) with ivtv-0.6.3, as if the static were magically cleaned up. * This ghosting did not appear on my new Linux server running the same LiveCD and ivtv-0.6.3, as if the static were magically cleaned up. The solution came to me reading a post made in (and misposted into) the ivtv-devel group: http://www.gossamer-threads.com/lists/ivtv/devel/33583 Apparently for the ivtv-0.8 series, the temporal filter defaults to 0. I'm guessing the temporal filter is an on-card ability to clean up a noisy analog cable signal. I'm going to ask generically about the onboard filters in another message. I'm happy! After 5 weeks of tracking down a noisy signal, running through my attic, moving my PVR card around from one system to another, I've managed to diagnose the problem. (OK, maybe it took 3-4 evenings, but I've got kids! ) Trevor Bradley Surrey, BC
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