Hello. So, I am pretty new to all of these stuff related to DAIN-app, so I don't understand these things.
So, I try to make a 5:41 long video (166MB, mp4) into a 60fps video, and I encountered this error.
I can't seem to find any solution to this. 

(Also, can I use .mkv files as input video?)

My PC specs:

Windows 10 64bit

i3-2100 3.1GHz

4GB DDR3 RAM

GTX650 2GB

Thank you.

Same error, my specs:

Windows 10 64bit

i7-4770k

16GB DDR3 RAM

GTX 770 4GB

I have the same issue.

Specs:

Win 7  Ultimate 64 bit

i7 2600

16GB DDR3

ASUS GTX 660Ti 2GB (with a frankly ridiculous OC that makes it benchmark faster than a GTX 960 - I got lucky with the card I think)