.mkv exporting problems

[VHS_UK]

If the 60fps verison is the 50fps version with 10 additional frames per second more then: no
In general ot depends on what happens with the video to get to the frame rates.
-> you need to share more details if you want a more detailed answer.

Cu Selur

Ps.: I'll drop SalFPS3 from Hybrid, since:
a. it's not better than the other methods
b. the motion.dll is only Avisynth 2.5 compatible and nobody has updated it for years

The video was originally 25fps. So you saying it not normal for 50fps video to be bigger than 60fps video? I did made one 50fps video that was downsized to just 1GB but I'm not sure what settings I used for it. What kind of details you want to know?