TAS Video comes out distorted

[bejimars]

I'm new to TASing so sorry if this is a simple answer.

I changed all my settings to what I think they should be (no audio output, dump files, etc), I make my TAS, and I save the input recording. The Dump works correctly with the audio, but the video is, I guess stretched. Any help?

I added audio and video and sync'd them together, and the start is just a black screen.
Video showing the problem: https://www.youtube.com/watch?v=2WHMIGwBx8w