Help deinterlacing fully interlaced NTSC dvd's

[encod3r]

GOAL: figure out the best way to have a combination of good deinterlacing, little ghosting, and smooth edges and not mess up on scene changes. Heres what I know/tried (correct me if im wrong):

-DVD2AVI shows 100% NTSC Frame Type: interlaced <- video NOT film
-About 5 heavily interlaced frames for every 1 'decent' looking frame

-IVTC: please don't suggest it (jerky playback, cause of the above source!)

-MY TESTS!

--FieldDeinterlace()
---Bad ghosting w/ action scenes and screws up EVERY scene change (blending them)

--FieldDeinterlace(Blend=False)
---Pretty much opposite of above, handles action better but slower scenes have more small ghosting effects and maybe half the scene change problems as above

--VerticalReduceBy2() (FastDeinterlace)
---Bad ghosting, handles scene changes bad. Probably wont ever use this again, yay

--GreedyHMA(1,0,0,0,0,0,0,0)
---Similar to the FieldDeinterlace, overall pretty good with ghosting but still screws up scene changes

--Telecide()
--Decimate(mode=1,threshold=50)
---I suspect this is the same thing as doing FieldDeinterlace(Blend=False) but I could be wrong. Results were very similar and still messes up some scene changes!!

--Telecide()
--Decimate(mode=1,threshold=50)
--FieldDeinterlace()
---Blend, blend, and blend some more but still no luck

-

If you have ANY suggestions on how I might resolve these problems please reply to this thread, if you need screenshots or whatever because you dont understand what im saying please ask. Im willing to try anything at this point.

[tomy601k]

I was just about to post the same problem when I saw your thread ... Thanks very much man ... you saved my time ... I was going to do all these tests you've done ... but I think they won't be useful ... I've tried only to do field deinterlace ... but I faced ghosting and bleding like you ... I hope someone could give us a solution for this problem ... Thanks.

Tomy.

[encod3r]

DivX isn't really designed to handle interlaced frames so we have to use non-perfect and non-exact methods to even make it work at all. Basically i've just been getting told that and not any alternative deinterlacing techniques just 'use an mpeg format'. Anyways, I dont think this is all we can do and ill keep you in touch if I hear anything outside of this thread.

[manono]

Hi-

Down in the AviSynth Forum is word of a new Deinterlace filter which evidently works very well on pure interlaced sources, so you might want to try it out. You can find the thread here: TomsMoComp Filter (http://forum.doom9.org/showthread.php?s=&threadid=28778).

[tomy601k]

Hi manono ...

Thanks for your reply ... I tested the filter on a small clip ... it did a great job actually ... :cool: ... I have to do some tweaking now ... I used the default settings ....
TomsMoComp(1,15,1)

I need to do other tests also ... but so far so good ...

I'm waiting for your feedback encod3r ... :)


Tomy.

[tomy601k]

Sorry ... douple post ... :rolleyes:

[encod3r]

I just checked out this filter with about 4 different settings just for initial testing. It is definitely something to keep an eye on as it has handled the source better than the previous methods.

From what i've noticed:

Pro's
-TomsMoComp handles ghosting on panning and action scenes rather well. Anytimes that it would show slight ghosting would be easily concealed during playback.
-Maintains good image quality in still scenes for the most part
-Speed is comparable to other methods

Con's
-Still blends scene changes in some cases (despite the settings)
-Minor edge problems on text and fine edges

Overall this is the best i've tried yet. Also for being a first release its very impressive I just hope the author keeps it updated for us =]

[CryptKeeper]

are any of you using GKNOT?

i found that in some ntsc fully interlaced dvd's

smart deinterlacing works using force film as well

[manono]

i found that in some ntsc fully interlaced dvd's smart deinterlacing works using force film as well

No it doesn't-you just think it does.

[CryptKeeper]

and why is that?

[manono]

Because if it's ntsc fully interlaced , then it was created at 29.97fps. You Force Film it and you remove 20% of the original frames, and the result is that it plays jerky, or with a noticeable stutter. And that's assuming you know how to determine what the original material is. Have you read and understood This (http://forum.doom9.org/showthread.php?s=&threadid=23776)?

[CryptKeeper]

if it were to play jerky

then why isn't it playing jerky?

explain that to me

[manono]

Hi-

Because then it's not ntsc fully interlaced , and should have been IVTC'd and not Force Filmed with a deinterlacer slapped on. The resulting quality would have been much better. Did you actually look at the frames to figure which you had? You can't just go by DVD2AVI. Reread hakko504's last post in the thread to which I linked.

[CryptKeeper]

LMAO*
you're too funny

of course i looked at the frames

i've tried many times with ntsc 29.970 interlaced movies
to use ivtc and they sucked

you can't always follow what you think would be right for the movie
you gotta experiment

and believe you me i experiment enough

i sometimes rip the exact same movie 3 times
using different methods just to see which would be best
and then i rip it again if i still don't like it

[manono]

This isn't ISO News. You're playing with the big boys now. I couldn't care less if you screw up your own movies. It's when you start passing out faulty advice that I object.

i've tried many times with ntsc 29.970 interlaced movies to use ivtc and they sucked

Of course they sucked. They haven't been telecined in the first place, and therefore can't be IVTC'd. And what is Force Film but a "weak" form of IVTC? And you're recommending it for video sources?

[CryptKeeper]

read my initial post to start off

"i found" that in some ntsc fully interlaced dvd's

smart deinterlacing works using force film as well

---------------
doesn't mean others would find the same results

what works for me might not work for others
what works for others might not work for me

and in most instances
alot of what works for others doesn't work for me

so don't go breathing down my neck

[Crucio]

sorry, but manono is right, there is no reason to take out frames that were not telecined to begin with. If the camera takes 30fps, theres no reason to reduce it to 24. The only reason Inverse telecine is needed is when someone shoots the video at 24 and interlaces 6 other frames to make it look better on our good old 1930's TV technology. The movies that you did either were not fully interlaced, or simply would have looked better if you had used smart deinterlace and skipped dvd2avi's weak ivct.