So I recently ran into this issue and had a quick fix. I was wondering if anyone has a proper fix.
I am doing a 3d motion track of some footage- then adding some C4D elements. I had to create a mocha shape roto for some foreground objects so they sat in front of the C4D elements.
Everything was going fine- until i tried to export the mocha shape data to after effects. It kept coming in a little slower than the video with the C4D elements. It was the exact same clip, same size, same frame rate, eveyuthing was the same- EXCEPT I had a PNG image seq from C4D and I used my original vid file in mocha. However, they should have been playing back the same.
I did a test and exported the video file to PNG seq in after effects because that is what I started with as my background layer in C4D. I re-imported the image sequence and the frame rate was off. The image sequence was plying at roughly 220 fps, while the original clip was 281 fps. I tried exporting at 24fps rather than 23.976- but I ended up with the same results. I played around with different export options and gave up. I did not want to redo all of the mocha roto work, so instead I did a time adjustment on the image sequences so they matched the original file and the mocha shape info.
It was a quick and dirty fix and was wondering if anyone knows what the real problem was. I tried all of the main steps, from deleting plist files to creating a new after effects file to restarting my computer. This is bothering me because I know there is a proper fix. Any help would be great. Thanks.