Using MultiDecimate--Telecide needed for first pass?

[theeht]

I'm attempting to use Multidecimate on a VHS capture of a silent film that appears to have been telecined in a strange way.

My script for the first pass looks like this:

loadplugin("C:\Program Files\AviSynth2\plugins\multidecimate.dll")
SegmentedAVISource("G:\mary\mary4.avi")
Trim(41,105042) ++ Trim(105808,142342)
AddBorders(0,4,0,4) [this is because I cropped out garbage VHS lines during capture and wanted to bring vertical resolution to 480]
MultiDecimate(pass=1)

But do I also need to load Decomb and include "Telecide()" in the script for Multidecimate's first pass to work properly? If this should be clear already, please forgive me, I'm a bit out of my depth here.

Also--when the instructions say to "Load the script and play it", this means to load it in Virtualdubmod and click the "Play input" button, correct? Again, I'm sure this should be obvious...

[manono]

Hi-

But do I also need to load Decomb and include "Telecide()" in the script...

Yes, and ConvertToYUY2() as well (unless it's already in YUY2). And you can skip the AddBorders(0,4,0,4) until you do the real encoding. Using Decomb 5.0:

Telecide(Order=1,Post=0)
ConvertToYUY2(Interlaced=True)
MultiDecimate(Pass=1)

...when the instructions say to "Load the script and play it",...

Yes, and after the movie starts playing in the VDubMod screen, left-click it to stop it playing and your speed increases a lot. Is there anything to add or amend, neuron2? :)

[Guest]

Originally posted by manono
Is there anything to add or amend, neuron2? Nope. You're the expert; I just wrote it.

Maybe I could add that you should be careful about static scene protection (if used). My default is ridiculously high, IIRC.

[theeht]

Thank you! Thought that might be the case. I believe my source is YUY2--when I load the avs script into vdubmod and look at file information it says it is, though when I simply load the AVI it just says it's MJPEG. Would Multidecimate simply refuse to run if it weren't YUY2? If so, I'm ok, because it is running.

I wonder if I could ask you a question since you are known as the silents expert. My VHS source is extremely noisy--but the noise is mostly from the original film source rather than the VHS transfer. It is so bad, though, that in my test encodes the Divx spends so much energy on coding this noise that static backgrounds look as if they are constantly shimmering. What do you do about this kind of thing? My impression is that most denoisers are more about eliminating VHS and broadcast artifacts than about film scratches and such. Thanks for any help.

[manono]

Hi-

Would Multidecimate simply refuse to run if it weren't YUY2?

You'll get an error message from VDubMod. Then you just go back and add it to the script.

What do you do about this kind of thing?

Having had no experience at all with captures, when I run up against an unrestored noisy DVD, I just use Undot and a light temporal smoother. Noisy material is harder to compress, but you can get away with higher average quants than with clean sources. I don't want to lose any more details than necessary. Others may have differing opinions. You might find some tips in the capture FAQ in the Capture Forum.