Convert AVI from 29.97 to 23.976 fps?

[DJRumpy]

Can someone point me to a guide on Inverse Telecine? Adam got me into the idea. The only problem is that my captures from VHS are all at 29.97 fps. I'd like to drop them to film, but I don't have the tool to do it, or if I do, I'm not aware of it.

TMPGenc is not an option. I'd like to finish this project in my lifetime. Is there a tool that will work on the avi, and leave it in AVI format for CCE encoding later on?

[AceYu]

AVI Synth should do it. BTW whats wrong with TMPG??

Later BRETT

[DJRumpy]

TMPGenc is too slow. I'm using CCE. How do I use AVSynth with CCE?

[snowmoon]

You will need AviUtil and VFAPI conversion tool and plugin for tmpgnec.

TMPGenc's IVTC is still the best for analog captures. I use CCE to encode ( what! ) her's how. I load up my avi in AviUtil including any additional parts. I then edit this project cutting out commercials. I save this project.

I open the .aup file in TMPGenc and load an appropriate template for what I want to do. I then set up my filters IVTC 24fps flicker priority. I save this project.

I then convert the .tpr using the converion tool to a fake .avi ( desect audio or it will take a while to save the .wav file ). CCE 2.5 should be able to open this file and encode it. If you plan on doing multipass then open the .avi in vdub and save as segmented .avi using a lossless codec like huffyuv or Pic lossless jpeg. This will save time since it does nothave to do the same filtering over and over agian, it just does it once.

Cheers

[DJRumpy]

Sheeze..this is the short answer? {*sigh*} Almost makes me want to forget the film capture, and stick with 29.97.

I was hoping for something like pulldown.exe that could simply process the avi and be done with it.

[LeeBear]

DJRumpy: If you're capturing at 29.97 fps (video) you won't be really doing an IVTC because your source was never TC in the first place. You'll only be decimating frames. The only reason we use IVTC is because films are shot at a 23.976 fps, encoded at 23.976 fps, telecine to 29.97 fps so we can play them back in our DVD players. We then IVTC so we can get them back to the original 23.976 fps they were shot/encoded with. If you IVTC your video source you'll most likely get unnatural movement.

-LeeBear

[DJRumpy]

I'll take your word for it. I was just experimenting with ways to increase bitrate, and reduce size. It sounds like this is more trouble than it's worth.

[snowmoon]

LeeBear:

Not so. Many things off the TV are true clean teleceine'ed materal. Take what I'm doing right now both firefly and john doe are telecine'd shows.

The TMPGenc IVTC also hadles unclean telecine ( filmed -> telecine -> eddited ) very well. Use 24fps priority with flicler priority + a de-interlace mode and it works like a charm.

[LeeBear]

snowmoon: True there are some shows on TV that are telecined, but the majority of the shows are not. We do not know what DJRumpy's VHS show is, heck it might not even be a show but a camcorder recording. The point I was making in my post was to not IVTC if the source wasn't telecined in the first place. TMPG IVTC is pretty good but there's no way I'd use it on a source that was truely 29.97 fps so I could save some bits. I hope you are not suggesting otherwise. If you are then you must be the one releasing all those DiVX's with 20 fps to save bits

-LeeBear

[snowmoon]

I would never recomment IVTC of source that does not show a strong consistant 3:2 pulldown pattern. But, I have found decomb.dll for svisynth can do progressive restore and postprocessing to make mixed mode stuff come out reasonable. If you ever have something that is almost 100% 3:2 decomb ( telecide + decitate ) with post processing will give reasonable results.

[DJRumpy]

Ok, I'll bite. How can I determine if my source contains a 3:2 pulldown pattern? These are all store bought VHS movies, not taped from TV.

::EDIT:: Also, how do I figure out the field order? ::EDIT::

[snowmoon]

When stepping through the captured avi you should see..

3 progressive frames 2 interlaced 3p 2i .....

Of course you cannot always see the interlaced if nothing is moving. It they are movies then TMPGenc's IVTC is a good thing (tm).

[pijetro]

Ah yes, you should have said so right away. You can pretty well bet a week's wages that your Blockbuster video is telecined from an original source of 23.97fps. So if you capture at 29.97fps, then ivtc should work for you. It saves disk space.

Btw, to have it properly work you should capture ???x480 to capture both fields. An article I read says that a 2hour movie @ 600kbits/second in low motion Divx can be bumped up to 800 kbits/second. You shouldn't have to deinterlace either. Ivtc does that for you.

Good luck!!!!!![/b]

[DJRumpy]

Ah..so that explains the flashing "Progressive" & "Interlace" field on DVD2AVI when previewing.

Any answer for determining the field order?