20 bad frames out of thousands: Script or other tool to hold previous frame for those without ripple delete

[Tomas Bumbulevičius]

Greg, few questions:

1. Is it OK to have more than few static frames to fill in the gap?
2. Instead, maybe you should just ‘slow down’ the previous or upcoming clip, or even both, to fill that gap as naturally as possible? ‘Rate Stretch Tool’, shortcut of ‘R’ would do it.

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[Greg C neumayer]

I don’t have a script handy that would do this, but here’s the approach I’d take to try to write one:

–> On a null layer, use a marker to note each frame with the error
–> Turn on time remapping
then,
pseudo-code:
// if (is this a frame with a marker?)
// then get the current time
// display the frame for current time -1

[Greg Sage]

Hadn’t thought of using markers. Not sure how that’s referred to exactly within the IF statement, but sounds like something that could be looked up.

thx

[Greg C neumayer]

Here’s a good documentation page on using expressions with markers:
https://expressions.aenhancers.com/markerkey.html

[Greg Sage]

Hmmm.. Maybe.

It’s a very fast lip sync, so timing is everything. I should’ve clarified too.. it’s never more than one consecutive frame, so at most, I’d be interpolating across a single missing frame at a time. There’s just a number of bad frames randomly scattered throughout the clip. Mainly bad light flashes or sudden jumps that correct in the next frame, so even just holding the previous frame would be a huge improvement.

Off the top of my head, that might work better, or it might be interpolating a bunch of frames when it’s not really necessary. Can’t say I have an opinion beyond that first impression as I’ve never tried to smooth over a missing frame before. I’d have to think through the stretch thing to work out how many previous frames it should be stretching, etc… and, of course, how to script it.

[Greg Gesch]

Hi, a simple (though manual) method:
Add a copy of the footage underneath, push it ahead 1 frame so it’s out of sync – delete the final frame, turn off sound.
On your top layer set a HOLD keyframe for Opacity 100, go to first problem frame set a hold keyframe at 0 Opacity, move ahead one frame set a hold keyframe for Opacity at 100. Select and copy the 2 keyframes and then paste them at each problem frame.
This might be quicker than setting markers etc. etc.?

[Greg Sage]

Definitely hadn’t thought of that approach. Yeah… Might just be simpler. as they’re always repeating the 1 previous frame. I’d have to create markers anyway (or a list entered into script somehow) to do any other way, so keyframe pair per skip frame is certainly no more work.