My source looks like blended fields

[sigma2x]

I have decrypted the music video by sum41 from the PAL spiderman dvd and assumed it would be as simple as using the Telecide command,
but it didn't work so I tried just plain deinterlacing and bobbing but the produced frames are blended.

I downloaded the sRestore function but it there are still blended frames.
This is my script.

mpeg2source("VTS_01_1.d2v")
tomsbob()
srestore()



A screenshot of the result:



and the unprocessed sample:



Am i right in saying this is fieldblended?
if so what else can I try.


Regards.

[Dogway]

try SRestore(frate=23.976).
If you still see blended frames, then you will surely have double field blended material where nothing can be done.

Tip: dont trust preview. Encode to evaluate or give the preview some 30 frames of framesteping to precompute.

[manono]

I think it's 23.976fps as well. However, it's been blended in a peculiar way and you may not be able to remove all the blends. The best you can do is to get rid of most of them and have it play smoothly, which the sample seems to do at 23.976fps.

And I'm also assuming Dogway implies the use of a bobber before the SRestore(23.976).

[loekverhees]

The pattern is that the first field is unblended and the second field is blended. But this pattern changes all the time (so suddenly the even fields become blended and the odd fields are good). Is there a filter that can see which field is blended (and removes this field so you're left with just the good fields)?

[manono]

That's not the pattern, but maybe you're thinking of something like CDeblend, which will show you more easily that it isn't the pattern. It won't remove the blended fields but (usually) replaces them with a nearby clean field. CDeblend is in the 'Old' file as part of the SRestore package.

[sigma2x]

Ok Thanks everyone who replied, I'll add the frate=23.976 to sRestore but even without that it played back at 23.976 fps in vdub.
So I will just live with the weird blending then, I'm only encoding it for my phone anyway, small screen.


Regards.

[Didée]

In the past, I have found that in particular music videos often are a stumbling stone for deblending scripts.
Reasons may vary ... "fast action" with very frequent scenecuts might be one factor. Often it seems that the normconverter used for music videos works slightly different than what you usually would expect for film sources. And a few other factors.

Whatever the main culprit might be ... fact is that deblending of music videos has a strong tendency to work not as good as deblending of film sources. That's how it is.

[sigma2x]

Didée is there any reason studios put garbage like this on PAL dvd's?


I just ripped the music video from disc-2 of transformers 2 and it was already progressive, is this a new trend? because I like it! :sly:

[loekverhees]

That's not the pattern, but maybe you're thinking of something like CDeblend, which will show you more easily that it isn't the pattern. It won't remove the blended fields but (usually) replaces them with a nearby clean field. CDeblend is in the 'Old' file as part of the SRestore package.
I don't understand why you are saying this is not the pattern. After using SeparateFields(), one frame is blended and the next frame is not blended. This pattern repeats itself, but sometimes changes order. Why are you saying that this is not the pattern? What then is the correct pattern?

[manono]

What then is the correct pattern?
You said there's one blended and one clean field in every frame, implying that by removing all the blends you'll return a clean 25fps. But there are additional dupe fields in there that can also be removed and the correct framerate isn't 25fps but 23.976/24fps. If you use a bobber followed by SRestore at default settings you'll get the correct framerate. If you put on a bobber followed by the CDeblend I mentioned earlier, it's easier to spot the additional dupe or blended fields.

[loekverhees]

Ok, I see. Thanks ;). Does SRestore actually look at the image to decide whether a frame is blended? Because some blended frames are left after applying SRestore.

[manono]

I don't know how they work; I just use them, the unblenders. As Didée mentioned, music videos can be especially difficult to unblend, I think because of all the editing that's done, and the frequent scene changes. The unblender can't lock on to a pattern immediately, and may take a few frames to get it right after a pattern change. Just a guess. I don't work with music videos myself.

[loekverhees]

Ok, thanks.