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rjc7394
31st May 2005, 22:30
I've tried several deinterlacers (kernel, telecide, smart) on this video (which is not 3:2) at the lowest (or best) comb detection values and still have some combing/blurring during high motion scenes. I'm not using any blending during deinterlace. I am using 2-pass Xvid (w/motion compensation) which seems to give better results than Dvix 5.2.1. Kernel has always given me good results. Not sure what to try next.
jggimi
31st May 2005, 22:39
Since you're already using AviSynth scripting to deinterlace, you might want to check to see if the artifcats you're seeing are in the fields themselves, and not from deinterlacing.

Just use the SeparateFields() filter. It will put each field into its own frame, and you can then check to see if the artifacts are in the original fields via scrolling in an editor.

I recommend starting with unresized content. For example, if you're working with DVD sources, leave the source at 720x576 or 720x480. Your output will be individual fields -- therefore, twice as many frames -- at half height of course -- 720x288 or 720x240
rjc7394
1st June 2005, 03:08
This is an mpeg2 encoded from a vob. When I separate I don't see any interlacing (I do see a lot of blurring which is what I can't get rid of after I deinterlace). If I import w/o separating I can see the interlacing. The deinterlacing isn't causing the blurring. Maybe the blurring is just poor quality film. So after you deinterlace and you end up with 1/2 height output what do you do to get back to full resolution?
jggimi
1st June 2005, 03:46
SeparateFields is not deinterlacing. It is separation of the two fields into individual frames. It can be used as part of a deinterlacing process, but, as you have already noticed, you have blended fields, which deinterlacing will not solve:...I do see a lot of blurring which is what I can't get rid of after I deinterlace...These are usually caused by poor NTSC->PAL conversions.

See www.doom9.org/ivtc-tut.htm for more information, in particular, section 7 discusses these dreaded blended fields. There isn't much you can do about them.