PDA

View Full Version : Big Deinterlace Problem


FFT
10th May 2002, 17:57
Hello, i'm a new user to this forum, but i've read you for a while, I shall begin to thank everyone here for the usefull tips you are sharing.
So here is my problem, I'm trying to compress a PAL interlaced material and have a dilemna, the easiest way to go is using Gknot to generate and AVS script with smartdeinterlace but this is producing a blurry result in vdub which i don't like, the other way is to directly compress using dvd2avi 1.76 with the "Save AVI 2pass" function with the embeded parameters of divx 5 pro set to "all frames are interlaced" and the rest like usual (GMC/BD.., no quarter pixel, etc.), the results is far better (inmho) but i get blue/green artefacts on the edges of moving items to compensate to deinterlacing.

I post the pictures here so you can compare by you own jugment.
Vdub with smartdeinterlace (same result with fastdeinterlace)
http://www.fourrier.com/01.jpg

Dvd2avi 1.76 with Divx Pro5 doing the deinterlace job
http://www.fourrier.com/02.jpg

I've read some thread here about deinterlace, I also tried the decomb 3.8 filter thus modifying the gknot generated AVI synth script with the following function : FieldDeinterlace() but same blurry result (the path of decomb.dll is OK in the script)

I'm wondering if i'm doing something wrong, why Fast / Smart deinterlace give the same blur...

Any options appreciated ;-)

Thanks.

arcman
11th May 2002, 12:21
Hmmm... just a thought.

Could it be that for some strange reason VirtualDub handles wrong interlace pairs. This happened to me twice on some material. I.e. VirtualDub took the fields from different frames causing this kind of effect. I had to change the field order to get desired result.

FFT
11th May 2002, 14:16
Thanks for your answer arcman, where do i change the field order ? i don't see any option in the AVS script to do that.

Dreassica
11th May 2002, 17:17
DoubleWeave
SelectOdd

I believe this should do the trick

hakko504
13th May 2002, 08:37
First, is the blend parameter of smartdeinterlace/fielddeinterlace set to true? In that case try setting it to false. Keeping the deafault of true usually gives blurry results.

Secondly, ComplementParity can be used for changing field order in an AVIsynth script. Doesn't always work, but it's worth a try. See the AVISynth docs. (http://www.videotools.net)