Hi
"Hi Nat, i can't find that option 
" "3.74"
Your version of VP is fairly old and that choice was not in version 3.74, You can only choose from a list or enter a custom value in that. Select a framerate for the output the same as your input video and see what happens.
This may not resolve the issue but C-major may have an answer to your problem. The latest version, just released is 4.57 and there has been a lot of changes.
Nat
