Is a perfect IVTC possible?

[j1d10t]

Is it possible to do a perfect IVTC? I've been using VirtualDub, but every once in a while it leaves an interlaced frame in, instead of removing it. Is there a better program, that doesn't miss frames? Or could I go in to VirtualDub, and delete all the telesynced frames, then change the frame rate to 23.9... frames per second? I know that would take a long time, but can that be done? I'm looking for a way to do a perfect IVTC, even if it takes a long time to do...

Thanks in advance for the input/advice

[adam]

Personally the best IVTC filter I have ever seen is decomb.dll, but if you are going to use it you will need to learn how to use Avisynth. (www.avisynth.org.) I have never had any stray fields or interlace artifacts with this filter and I use it everyday.

It is possible to manually do an inverse telecine through TMPGenc but it is extremely tedious.

[j1d10t]

I've really been trying to stay away from AviSynth, but I guess it's time I learned This is probably a stupid/newbie question, but what would the decomb AviSynth script look like? What settings do you use? I just downloaded the decomb plug-in for AviSynth, and have been reading up on it, but any advice you can offer would be greatly appreciated

I'm not trying to take the easy way out, by having you spell it out for me, but if you know of any settings or something that would help out a big time AviSynth newbie, I would really, really appreciate it

Thanks

[adam]

If you use a newer version of Avisynth then you do not have to manually load your filters in your script, ie:decomb.dll. Just put any filters you want to run in the Avisynth/Plugins directory and Avisynth will automatically detect them.

So if you had a source which you knew had undergone a typical 2:3 telecine then you could use this script for an avi file.

AviSource("Path/Filename.avi")
Telecide()
Decimate(cycle=5)


And for an mpeg2 source you'd run the mpeg2 through dvd2avi to create the d2v file, download the mpeg2dec.dll and place it in your Avisynth/Plugins directory, then for the first line in the above script, substitute this line...

mpeg2source("Path/Filename.d2v")

If your source has undergone strange telecining patterns, which is possible since you said other IVTC scripts have missed some interlacing, then you will need to adjust the syntax you use in decomb. You'll just have to read the documentation that comes with the filter to get a better idea on how to use it. Luckily, most commercial NTSC material that has been telecined, has undergone typical 2:3 telecining and is easily and perfectly IVTC'ed by the above mentioned scripts.

There are some good FAQ's for avisynth on doom9's forum as well as at avisynth.org. Its important to make sure that all of your filters have been compiled for the version of avisynth you are using and if you are using CCE as your encoder than there are certain workarounds, ie: audio bug, that you must implement. If you ever need to test out your script then open the AVS file in media player and if there is anything wrong with your script than you will be given an error msg telling you which line of your script is incorrect.