Sequencer render movie adds extra frames at the end.

Thanks for the bug report. Unfortunately, the fix for this will be part of a larger refactor that includes fixes for other issues. I’ve mentioned this recently in another thread:

https://answers.unrealengine.com/questions/703357/sequencer-outputting-game-frame-instead-of-camera.html?childToView=704260#answer-704260

For your particular issues, we have an existing bug report that’s not publicly visible yet (hopefully in a day or so):

https://issues.unrealengine.com/issue/UE-46855