I have several placeholders where I have added keyframes for instance opacity fade up and down at the beginning and ending of the layer. If I replace it and the video is longer/shorter than the placeholder then the keyframes will not adjust. Is there some way to have keyframes move dynamically based on the video length? I looked into expressions to calculate the start and end time of the layer then fade in and fade out using the time but it was quite time consuming and inefficient, it would also be hard to write new code for say position versus have dynamic keyframes.
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