Render does not match RAM preview. Totally baffled…

[Alex Wallach]

Dave, thank you SO MUCH. I was stuck on for a couple of hours with masks that were perfect in RAM preview and then moved around on me when rendered. I couldn’t find a solution to the problem anywhere online until I read your comment. I registered an account here JUST to thank you. So, again…THANK YOU!!

Alex

[Tjoeme Snamedraab]

Hi there,

I know this specific problem has been resolved, however I had the same problem and the answers in this thread did not help my specific problem. (I live in a PAL region so 25 fps really is 25 fps)

My problem:

When using a motion tracker the RAM preview showed me a perfectly tracked picture.
However when I rendered the object that used the motion tracker was off by multiple pixels in every direction.

My solution: (probably not the best solution but it worked)

Import the After Effects composition into Premiere (Premiere -> File -> Adobe Dynamic Link -> Import After Effects compostion)and export from there.

This fixed it and the render looks perfect.
I hope someone might find this info usefull.

Bye!

[Ryan Donahue]

Often, multiple layers/effects get ‘corrupted’ timing-wise – Solution: Right click multi layers and ‘pre-compose’ !

[Jack Blue]

I had the same problem recently and the reason it happened for me was because when i applied the Roto Brush my preview wasn’t in full quality it was in half. The only solution i found to fix this was rendering the final video in half which i didn’t want todo so ended up redoing it