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I am working on a video which includes some dropped frames ever so often. When a frame dropped, it repeated the previous frame sometimes 2 or 3 times. I am overlaying many objects on this video, and the problem is that when interpolating a property, it continues to interpolate during the dropped frames, meaning the objects move while the video remains still. Because of the huge amount of objects in my scene (100+) it is incredibly tedious to go through each and find each dropped frame, set a keyframe for the properties, and copy them for all the repetitions of that frame. Is there a way to either set a keyframe for all properties at some time, or ideally to set time ranges for the whole composition where interpolation is disabled?

  • Posting as a comment since I don't have a full solution for you, but your best bet is going to be to interpolate new frames or alter your frame rate so you can drop out the frames in a custom pulldown. Neither are particularly easy unless you have software to automate it and I don't know what options are available for that right now. If you get the footage fixed though, then the problem goes away and it will lessen the frame stutter as well. – AJ Henderson Aug 8 '17 at 14:47
  • @AJHenderson I can write a program to remove duplicate frames, but I worry that this will then cause audio sync issues due to the amount of removed frames. Should I go down this route? – Aleksandr Albert Aug 10 '17 at 13:25
  • no you don't want to simply remove them. You need to actually interpolate a frame to go in their place. It's often possible to blend frames to get an approximation of what the frame would have looked like that is good enough to avoid a noticeable microstutter in the footage. It's been a long time since I've used such software though and I'm not sure what current options are. – AJ Henderson Aug 10 '17 at 20:03
  • If you turn the video into an image sequence and delete the dupe frames, you could use imagemagick to create an interpolated frame using morph. is.gd/RIgHae I've done that for video where there were lost frames, I just used shell scripting to detect the missing ones from the numerical sequence, and morphed them to gether to create a new intermediate. – stib Aug 11 '17 at 5:07
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Try frame blending.

  • Show the switch column in timeline.
  • Check, and enable the Frame Blending switch on the timeline.
  • Check, and enable the Frame Blending option of the layer.
  • Always check your composition frame rate.

Shortcut: ctrl + k (Win) or command + k (Mac)

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