IVTC with Decomb.dll 632, convert, result

andy

Hi

I read a lot of threads describing to use of the decomb.dll. So I made my script looking like this:

LoadPlugin(quot;E:\temp\converting\decomb.dllquot;)
AviSource(quot;E:\Temp\converting\1x12.aviquot;)
ConvertToYUY2()
Telecide(guide=1)
Decimate(cycle=5)
FieldDeinterlace()
BicubicResize(720,448,0,0.6,4,0,632,360)
AddBorders(0,64,0,64)
AssumeFPS(25)
Trim(0,79494)

My Source Material is a DivX Avi with 29,97 Progressive 640x360.
I want to convert it to 720x576 25 fps.
But the result runs not very smooth. Did I forget anything in my script ??
I use the latest beta of decomb.dll and avisynth 2.5.

Would appreciate some tips.

thanks in advance
regards
miachn

Delete the FieldDeinterlace() call. That is performed by Telecide()'s postprocessing.

Jerkiness usually comes from decimating material that shouldn't be decimated. Have you verified whether the material that comes out jerky is 3:2 pulldown content or is in fact 30fps content. If you decimate 30fps content, it will be jerky.

Post a link to an unprocessed source clip if you want a definitive analysis.

Hi

Thanks for your fast answer. Already tried it without the deinterlace, still the same....

I have uploaded a clip to yahoo (1,4 MB)regards
miachn

Clip

The ConvertToYUY2 is useless.

If your AVI is deinterlaced with blends or is true 30fps, you have no chance to get smooth 25fps. In those cases, don't use Decomb at all, but:

Trim(0,79494)
LanczosResize(704,432,4,0,632,360)
AddBorders(0,72,0,72)
SeparateFields()
SelectEvery(12,0,1,2,3,4,5,6,7,8,11)
Weave()
AssumeFPS(25)

And encode as interlaced DVD (use 704x576 resolution, it is a legal DVD resolution)

If your AVI is already telecided (every 5th frame is a duplicate of the 4th one), use Decomb that way: (you should get smooth 25fps in this case)

Trim(0,79494)
Decimate()
LanczosResize(704,432,4,0,632,360)
AddBorders(0,72,0,72)
AssumeFPS(25)

And encode as progressive DVD.

[EDIT1]
@ Neuron2: You should remove postprocessing from your Telecide function anyway, because it's slower than fielddeinterlace, as Telecide will be working on 30fps, and FieldDeinterlace on 24fps only.

[EDIT2]
The clip is deinterlaced with blends, use the first method. You won't get smooth 25fps, keep that in mind.

Hi

Thanks for that. Looks much better with your settings.
I think I can live with that result.

Thanks to you guys for the really quick help!!

regards
miachn

I can't make your link work.

Hi

Strange, it worked some minutes ago....

Try this:

Clip or Clip

regards
miachn

Is that the UNPROCESSED source clip? I don't see any combing in it at all. It looks like it has had FieldDeinterlace() or some other deinterlacer applied. I need the unprocessed source clip.

Hi

This is my source.....

regards
miachn

Originally posted by hundsmicahn
Hi

This is my source.....

regards
miachn
This is ambiguous. Were you trying to attach something or give a different link? I do not see any attachment. Or are you saying the original clip I downloaded is your unprocessed source?

Hi

I meant the link above. This clip is about 500 frames from my source file. (DivX 3 Low-Motion,640 x 360,29.970 FPS,913 kb/s)!! It is unprocessed (only saved it with vdub - direct stream copy - save avi....).

regards
miachn

Your source is a 3:2 telecined film that has already had a (blend) deinterlacer applied. Recovery of the original progressive frames using IVTC is therefore no longer possible. There is nothing useful you can do with this. You may as well leave it as is, although you can reduce the frame rate using other methods if absolutely required.

Decomb is for combed source.

Hi

Thank you for your analysis and patience. I think I will look around if I find the same movie with different framerate, or maybe convert it with the settings above, and live with that...

regards
miachn