Is this the right wayto deinterlace this sample?

[beav]

TFM(D2V="c:\Movie.d2v")
TDecimate(Mode=1)

[jagabo]

Looks like it. Generally, you should upload a sample from the body of the work, not the titles. The titles are often different than the rest of the show.

[sanlyn]

TFM/TDecimate are the proper tools for your sample vid, but that's not really deinterlacing. What you're doing is properly called inverse telecine, or telecine removal. That's where the name of the "IVTC" plugin comes from.

[beav]

I'm working with this crappy dvd source now, and there seems to be a problem. If you look closely at the boots in this screenshot and other areas you see a bluish color mixed in. Is there a way to get rid of this?

[jagabo]

I think what you are seeing is DCT ringing in the chroma channels. First try decoding with DgMpegDec and use it's deblocking and deringing filters:

Mpeg2Source("filename.d2v", CPU=6)

If that doesn't work try something like:

 MergeChroma(awarpsharp2(depth=30))

[beav]

Neither of those seemed to work

[jagabo]

Is that frame in the VOB sample you posted?

[beav]

no I'll upload a sample with the frame though

[jagabo]

Well then, I don't know what you mean by "a bluish color mixed in". I thought you were talking about the brownish grey blotches in your JPG image. But most of that is from the JPEG compression.

[beav]

If you look closely at the lines where there is aliasing, you can see a blue mixed into the line which I don't believe is suppose to be there. Will clearing the aliasing get rid of the weird colored lines?

[jagabo]

I don't see anything blue:



Just the greyish brown spots that are probably from YV12 chroma subsampling. Do you realize that YV12 video has colors at 1/2 resolution (each dimension) of the greyscale image? A 720x480 YV12 image has a 720x480 greyscale plane and two 360x240 chroma planes:



So small colored patches and sharp edges will always get discolored.

[beav]

Yea, that's what I'm trying to fix. Is it possible?

[jagabo]

Yes, work in RGB or YUV 4:4:4 and paint them by hand.

[beav]

Lol sounds like lots of fun! Thanks for the help

[jagabo]

The aforementioned MergeChroma(awarpsharp2(depth=X)) helps a little. Play around with the X value. The bigger the value the more the colors are warped/sharpened. But because of the chroma subsampling you will never get perfect results.

[jagabo]

Another thought: You migh try using a sharp resizer like nnedi3_rpow2() then shrink and merge the chroma from that back with the original luma. This seems to help a little (though I don't know if it will screw up other parts of the video):

 MergeChroma(nnedi2_rpow2(2).awarpsharp2(depth=20).BicubicResize(width,height))

But what's really happening is the red is bleeding into the black lines.

[beav]

I've never encountered this kind of a problem before, but thanks for explaining everything to me.

[jagabo]

chroma subsampling: https://forum.videohelp.com/threads/294144-Viewing-tests-and-sample-files?p=1792760&vie...=1#post1792760

Then compression adds artifacts on top of that, DCT ringing, macroblocking, etc.

[beav]

Ewwww sounds nasty. On another note, what do you recommend I use to get rid of the aliasing in my source? My favorite anti-aliasing filter SAA makes this source look to blurry.