Help me to clean this VHS rip using Avisynth!

[TheCage]

Two major problems!

The first you gonna see it on the screenshot. The second is about the frame rate if i dont wrong.


Please tell me what avisynth filters to use because never clean VHS rip before.
The second problem is - it seems that the picture jumping, im not sure if are drop frames or something but its very visible in some moments. its like the scenes switching to fast...

[jagabo]

Nobody can help you without sample video. Post a short sample of your source, not re-encoded, that clearly demonstrate your problems.

[sanlyn]

I don't think you ripped that VHS. I think you mean you captured it, yes? The word "rip" has specific meanings.

jagabo's is correct. One can tell very little from a still image, and much depends on how the image was made. You can post a few short seconds of the original unprocessed computer video in this forum. If you don't know how, feel free to ask.

[TheCage]

Ok. thats good idea. You'll tell me if you see anything wrong with the frame rate.

So yeah VHS captured in MPEG2. Then Converted to VOB because was for a dvd. Now I copied from the dvd.

Using
DgIndex
avisynth
MeGui

Here is the SAMPLE

[manono]

So yeah VHS captured in MPEG2. Then Converted to VOB because was for a dvd. Now I copied from the dvd.

Lemme get this straight. You captured it as MPEG2. Then you reencoded it for DVD, right? So, where's the captured MPEG-2? No one wants the already-ruined DVD VOB.

There's nothing wrong with the framerate. It's 25fps as it should be for PAL. However, there are both duplicate frames and missing frames so it plays real jumpy. And then there's the blending. Theoretically the source capture should be interlaced and maybe all of those particular problems could be solved if it's available. Otherwise, forget about it.

[sanlyn]

What we need is a sample of your original, unmodified MPEG2 capture. All we can tell from your sample is that something was done to it. If your original capture was from VHS directly to MPEG2 on your computer, a sample of the original MPEG is what we must deal with.

[davexnet]

Is it possible the captured mpeg was compliant, and in the authoring it was used as is?

[TheCage]

Yup...dont have the VHS cassette anymore.... only this. ;/

usually always keeping the sources but this time...

[sanlyn]

Yes, but you have the MPEG that you captured, before it was reprocessed. That's what we're looking for.

[TheCage]

I had used Mpeg2Cut to make this sample. The only file i have of this is VOB. Its seems that at the time to save some space on my hdd i had put the whole capture on that dvd... stupid

I'll try take the cassette again.

[jagabo]

If you don't have anything better than that you can start with this to get rid of the horizontal lines in the chroma:

chroma=BicubicResize(720,288).BicubicResize(720,576).awarpsharp2(depth=30).ChromaShift(c=-6)
MergeChroma(last, chroma)

Before, after:


It needs a lot more work but there's no point in pursuing this if you have something closer to the original.

[TheCage]

If you don't have anything better than that you can start with this to get rid of the horizontal lines in the chroma:

chroma=BicubicResize(720,288).BicubicResize(720,576).awarpsharp2(depth=30).ChromaShift(c=-6)
MergeChroma(last, chroma)

Before, after:

[Attachment 16712 - Click to enlarge]

It needs a lot more work but there's no point in pursuing this if you have something closer to the original.

thanks jagabo
its really better

[sanlyn]

I had used Mpeg2Cut to make this sample. The only file i have of this is VOB. Its seems that at the time to save some space on my hdd i had put the whole capture on that dvd... stupid

I'll try take the cassette again.

NPEg-to-VOB is normnally not a re-process or re-encode, it's a lossless conversion fom one file organization to another. What we are trying to get to is this:

You started with a VHS tape. Did you capture it directly to MPEG on your computer, or did you capture it to MPEG2 with a DVD recorder? That MPEG2 capture would be your original capture. But apparently a few things were done before it became the version in your sample.

[TheCage]

Direct to mpeg2 using capture program.

VHS Tuner: DAEWOO DV-F24D
pc card: AverTV DVB-S PRO (a700) /S-video IN)

So when i captured the tape the "source" was:
mpeg2
720x576
9000kbps

then converted to dvd

[jagabo]

Recapture (or go back to your original caps) and make sure the capture device is set to capture interlaced. Your video has the two fields blended together (deinterlaced) making them look like double exposures every time there's any motion. You want to see interlace comb artifacts in your caps -- that's what's on the tape.