Feature Request: PAL deinterlace

[debris]

I'm currently ripping "The Abyss" (RC2/PAL) and as some might know this movie shows interlace though it's been shot on film. It's not the "usual" telecine-like 3:2 stuff but just some sort of a shifted field order thing.
There are filters for VirtualDub called something like "PAL deinterlace" which can remove the interlace just by shifting the whole movie by 1 field (or 1/2 frame) forth or back.
It's hard to describe but I hope you get what I want to say. The downside of using traditional deinterlacing or smart-deinterlacing is that the picture gets blurred even more (Abyss isn't an anamorphic DVD and therefore it's very blurred even before deinterlacing).
I guess there are avisynth-plugs doing PAL-deinterlace the way "The Abyss" and other movies need it and so my kind request:
Could you include a "PAL deinterlace" option?

Thanks! :) for making GKnot the _perfect_ choice!

[debris]

Me again! :)

The solution might be even easier than I thought. I found this on the avisynth homepage:

# Duplicate the functionality of the VirtualDub "PAL deinterlace" filter:
DoubleWeave
SelectOdd

I could easily add this to the avisynth-script by copy/paste. But it would of course be even more comfortable to have GKnot add these lines by clicking a "PAL deinterlace" option ;)

Thanks again

[Antti]

Using GreedyHMA is a better way. It recognizes 2:2-pulldown effects.

[debris]

GreedyHMA is the IVTC-filter included in GKnot, right?
I guess I'll have to adjust the 2:2 pulldown detection manually too as I just tried the filter on The Abyss and it didn't work (total frame count 0).
BTW: adding "DoubleWeave" and "SelectOdd" to the .avs script gave me a perfect result and there was almost no recognizable difference in encoding speed compared to when using no deinterlacing at all.

Then, if using GreedyHMA is the better way, it would still be very nice if GKnot included a "PAL deinterlace" option that adjusts GreedyHMA for 2:2 pulldown.
The feature request stays the same :)

[fisix]

greedyhma IS included, but just to be clear, it isn't something you can click with your mouse to use. if you use the generic IVTC filter on the 'Save and Encode' gui, you end up using something else that actually seems to do a pretty bad job. at least it looked worse for me when compared to using dvd2avi->tmpg->vfapi->nandub OR greedyhma.

to enable greedyhma, you have to select the 'edit' button on the save and encode gui and then manually edit out the comments in front of the load plugin(greedyhma) line,
and the
ivtc greedyhma(x,x,x,x,x) line.
everything is clear in the file.

be aware though, that you should select 'none' in the deinterlace/ivtc section before you hit edit. also, editing the file forces you to either encode the credits at full bitrate, or to cut them completely off. you'll see the edit button grey out if you try to encode the credits separately (this has got to be a buggy work around on wef's part).

read the readme doc on what numbers to use in greedyhma, because the default in the file is set for NTSC. don't forget to set the famerate to 23.976 in gknot before you start the save and encode stuff.

sorry if this is a little pedantic, i just wanted to make sure you got the right stuff working because it's worked so well for me.

consider this my vote to have a check box put in for greedyhma in the gui, maybe with a set of boxes for input parameters.

-fisix

[TheWEF]

Originally posted by fisix
also, editing the file forces you to either encode the credits at full bitrate, or to cut them completely off. you'll see the edit button grey out if you try to encode the credits separately (this has got to be a buggy work around on wef's part).

no.
just edit and save twice. two avs-files, trim movie only and credits only. you can even use different filters, but you have to use the same res, of course.
later press "add job" and "select" the correct files for movie-frameserver and credits-frameserver.
now you can check "encode credits separately" and continue as usual.


wef.

[hassegubben]

If Greedy can help taking the PAL interlacing away, I would also like to vote for a PAL-Greedy-deinterlace-button in GKnot. Perhaps in the next version? :) Having tried the DVD2AVI/VFAPI/Vdub way and now using GKnot, I must admit GKnot has a great user interface! I hope I can contribute with at least some future suggestions to help a little. Great piece of work!!! :)