[HELP] Feature film with duplicate frames

[Miranda]

Is there a way to remove around 3,000 duplicate frames from a movie, and to replace those dropped frames with new interpolated frames in order to keep the same running time and audio in synch?

[Selur]

yes
"Filtering->Vapoursynth->Frame->Misc->FillDuplicateFrames" is probably the right choice if there are multiple duplicate frames in a row sometimes, otherwise FillDrops should work too. Replacing frames with interpolated frames should not change av sync.

If the duplicates follow a pattern, dropping them using SelectEvery while adjusting the frame rate would also keep the runtime and the sync.

Cu Selur

[Miranda]

The single dupe frames usually appear before or after a scene change, they are not in a row. What would work best?

[Selur]

Probably doesn't matter which you use if there are just single frame drops.

[Miranda]

OK, thanks. 

You would be surprised at the state of some masters sent out by so-called 'professional' film scanning facility houses.

[Miranda]

FillDuplicateFrames didn't work (with default setting), so now trying FillDrops.

[Selur]

Make sure to adjust the threshold (enable 'Debug' to see what the differences are), otherwise none of those functions will work as expected.

[Miranda]

FillDrops (MV) doesn't work either, it simply creates a new blended frame of both duped frames.

I guess I will need to play around with the FillDuplicateFrames option, but I have no idea what setting to use?

[Selur]

a. adjust the threshold so that only duplicates get interpolated
b. select rife for the interpolation

[Selur]

if you send me a sample of your source I can sugges a threshold if that helps,..