Convert to 24

[Zim]

A friend is trying to do this: Let me know if anything can be done. Here is his question

Anybody out there a real expert on video post work? Or know a way to get authentic advice?
I have a serious puzzle regarding frame rate conversion.

I am working with a high definition movie. It was originally shot in 24 frames per second. However at one point in it's convoluted life, it was converted to 30 (29.97) fps. This resulted, of course, in a pull-down with duplicate blend frames. This digital print is all we have. We can't get back to the original 24 fps footage.

However I need to create a 24 fps version of it. Every time I try, it creates a visible unacceptable stutter. I have exported from Final Cut and used Compressor and Quick Time 7 and I get several different results but they usually wind up with some blend frames or dropped frames that I see when I examine it frame per frame.

I just keep trying over and over in a random "hope this one works" approach. It's a huge move and each attempt takes hours.
Is is even possible to go back to 24 fps from 30?

 

[Demistate]

Is is even possible to go back to 24 fps from 30?

Maybe.

If the file was encoded with a 3:2 pulldown, you should be able to Inverse Tellecine it back to 23.976. After effects has a good IVTC method in it. Just right click the file, and click interprete footage. From there you can have AFX auto guess the method.

If it's some werid slap job where every 5th frame is a repete, you might have to come up with a special script in Avisynth to remove it.

If the frames are encoded with a frame blend (Each frame has parts of multiple frames in it) you are screwed. You will always have those blended frames.

Try posting a sample of the original file if you can. I can tell you your options if you can do that.

 

[Zim]

Thanks I'll pass that along to him