After searching everywhere looking for a decent non-command line video stabilizer, I found kdenlive and I really like it. However, I'm trying to stabilize videos, and the process is only using 1 cpu core and its taking hours to stabilize a 15min video.

How can I make it use more than one cpu core?

oh. There is a setting under "Environment" at the bottom for processing threads...

Seems it wont let me set it higher than 3 threads though... oh well, better than 1...