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| Picture Quality (R5A12) http://forums.linhes.org/viewtopic.php?f=5&t=3909 |
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| Author: | alien [ Tue Mar 22, 2005 12:41 pm ] |
| Post subject: | Picture Quality (R5A12) |
There have been a few posts about display quality. I've been playing around with a few things and I'm stumped. Basically, I see a slight fuzzyness in the display. It looks similar to a poor signal. Solid walls have a fuzzy, speckly texture. I am using the composite TV out of the Nvidia card. I have tried with and without XvMC with no difference (I currently have XvMC off because I like the blue OSD and FF is jerky with XvMC). First experiment: Burn a DVD. The quality is amazing. As good as, if not better, than if I had the cable plugged into the TV. That seems to rule out anything capture related (PVR-250, ivtv, etc.). Second experiment: Turn on denoise3d filter. Picture is sharp again. This seems to rule out anything related display (nvidia card and settings, cable connection, etc.). Unfortunately, this introduces some artifacts that are as bad as the original problem. So, it appears that something is introducing noise between the file and the filters. Any ideas where to go next? Allen |
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| Author: | steeve [ Tue Mar 22, 2005 12:53 pm ] |
| Post subject: | Re: Picture Quality (R5A12) |
alien wrote: First experiment: Burn a DVD. The quality is amazing. As good as, if not better, than if I had the cable plugged into the TV. That seems to rule out anything capture related (PVR-250, ivtv, etc.). yes, i see this, too (PVR-250, SIS on-board graphics) Quote: Second experiment: Turn on denoise3d filter. Picture is sharp again. This seems to rule out anything related display (nvidia card and settings, cable connection, etc.). Unfortunately, this introduces some artifacts that are as bad as the original problem. So, it appears that something is introducing noise between the file and the filters. Any ideas where to go next?
Allen I'm not sure where to go, either. Recordings from my PVR-250 look fantastic, but LiveTV picture quality is only so-so. I think this rules out signal quality. -Bob K. |
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| Author: | tjc [ Tue Mar 22, 2005 4:47 pm ] |
| Post subject: | |
I was burning a DVD over the weekend with a mix of recordings from before and after the update to R5A12 (0.17, ivtv 0.2...) and the newer ones were definitely a bit fuzzier (both when running and in freeze frame) when I previewed them on the monitor of my workstation. I'm not sure if this is a different day, different signal quality issue, or a different IVTV driver issue... |
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| Author: | alien [ Wed Mar 23, 2005 2:09 am ] |
| Post subject: | |
Just an update. Denoise3d works much better in conjunction with the Bob deinterlacer. The denoise artifacts are almost unnoticable (the picture is maybe a little softer). I'm actually very impressed with the quality now. The question still remains though: Why do I have to run the denoise3d filter to play recordings that don't have any noise? tjc: I didn't have my 250 with R4, so I can't compare to previous releases. Just a long shot: Have you tried to remove the "options tuner type=x" option yet? |
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| Author: | tjc [ Wed Mar 23, 2005 9:44 pm ] |
| Post subject: | |
alien wrote: tjc: I didn't have my 250 with R4, so I can't compare to previous releases. Just a long shot: Have you tried to remove the "options tuner type=x" option yet?
Just recently, but it was set to type 2 which is what it detects as anyway, so removing it was essentially a no-op. |
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