View Full Version : Captured Video shadows :(
fizgig10
15th October 2003, 05:48
I'm trying to capture a 2-minute video for work and I'm coming up against a wall. It's a VCR source going into my ATI Radeon VIVO card in WinXP.
It looks beautiful as it's being shown in virtuadubvcr but when I record either uncompressed or with Huffyuv v2.1.1 I get something like the image below. The normal crisp white letters moving from right to left relative to the camera are now blurry or doubled from the movement. I don't care about the file size as long as it can fit on a CD.
I've tried different framerates and de-interlace filters but feel like I'm wondering blindly as my video knowledge is geared more toward DVD->OGM, not capturing analog sources. If anyone has any tips I would be very greatful.
http://www.geocities.com/fizgig10/Smartlase.JPG
(I had to copy and paste this link directly into my browser, not sure why it's not showing up as I did use the [IMG] button, go figure)
Boulder
15th October 2003, 10:21
If I'm not completely wrong - which is known to happen from time to time - that's just caused by interlacing. If you encoded your clip to MPEG-2 as interlaced and viewed it on your TV, it would probably be OK (provided that you set the correct field order).
fizgig10
15th October 2003, 16:55
Sorry, I should have stated my ultimate goal. I want to capture from the VCR to a video clip to always be played on the computer. I've also tried capturing to mpeg1 and mpeg2 and they both show the same problems.
Boulder
15th October 2003, 17:04
I suggest you check the capture guide. It contains a portion which concerns postprocessing with Avisynth. The deinterlacing part may be of use; I'd try to tackle the problem with Telecide or TomsMoComp.
jggimi
15th October 2003, 17:08
It looks like interlacing artifacts to me, too. TVs are designed to show interlaced video, while PC monitors are designed to show progressive video. (Software DVD players can deinterlace during playback.)
For more on interlacing, and what it looks like, and why it exists, check out Doom9's Video Basics (http://www.doom9.org/video-basics.htm) guide. It's one of the 14 guides in his The Basics section.
fizgig10
15th October 2003, 17:54
I'm trying to run a script in virtuadubmod that looks like this:
AviSource("c:\dvd\smartlase.avi")
Trim(0, 5108)
Telecide()
It then gives me an error saying that it's for YUY2 only. Trouble is I did capture in YUY2. Argh.
Wilbert
15th October 2003, 18:18
AviSource("c:\dvd\smartlase.avi").info
What colorformat does that script give?
fizgig10
15th October 2003, 21:49
Well I got it to work. Here's what I did:
I had an mpeg2 already captured that also had the shadowing problem. I made a project file of it using dvd2avi and loaded it into gordian knot.
I navigated through gordian knot as I usually do when I copy DVD's (except the total size for me this time was 200MB) and before I told GK that it was OK to start the encoding process I copied it's avs file to somewhere else where I could modify it.
I then simply took the line that said "#FieldDeinterlace(blend=false)" and removed the # sign. I then dragged the avs file into virtuadubmod and set my compression settings. Xvid crashed midway through the compression. Divx5.02 did likewise. Divx4 fortunately made it through and I now have a great capture.
Thanks all for your help and hopefully this post will help others.
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