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vorob
2009 April 21st, 16:06
Guys, I’m in search of good deinterlace method. My camera captures in 50i, so we have 25*2 half-frames. I would like to save both of them and have 1080p@50FPS video. I’ve seen how BOB method works, separates this 2 half-frames and stretch them so they will be like 2 full frames, that’s good, but on incline surfaces I can see “ladders”, that’s not good at all, I want to see soft, like it was shoot in progressive mode.
http://vorobfiles.narod.ru/Untitled.png

Here is a good example of what I’m talking about. First shot was done using my friends deinterlace method but it blends 2 fields, with a priority of last one and makes from 50i 25p. Quality is super, but that’s not 50p. And the second one if, well, bob. See this horrible “ladders” on wires.

So I’m asking you, is there any “third” method which will keep sharpness of image, and save 50fps?

2Bdecided
2009 April 22nd, 09:00
You need a good motion adaptive or motion compensated deinterlacer.

Do you know how to use AVIsynth? If not, Google it, learn it, and then try yadif+nnedi for motion adaptive, or the very slow mcbob or tgmc for motion compensated.

The results are stunning, but take a long time!

Cheers,
David.

vorob
2009 May 13th, 06:40
At last, I’ve found this deinterlace method! http://avisynth.org/mediawiki/TempGaussMC

Look:
http://vorobfiles.narod.ru/Deint.png

Or full ones
http://vorobfiles.narod.ru/core_avc_bob.png
http://vorobfiles.narod.ru/gauss.png

Fantastic!

2Bdecided
2009 May 13th, 07:36
Yes, that's what I use.

That particular deinterlacer also helps to remove some of the MPEG-2 artefacts in complex HDV footage.

However, it's really very very painfully slow for HD!

Cheers,
David.