You might have more luck with a dedicated program like Motionbuilder. When we were doing mocap, our animator preferred it over maya for the initial stages of cleanup and editing. There is a trial, so you can see for yourself if it's fit for purpose.
Hopefully the title makes sense, but I essentially want to be able to record facial and motion capture data over 30 minute sessions, and then edit it down. I'm finding a lot of programs such as unity struggle with the editing process of this. And I'm considering maya, however I'm concerned with its ability to handle long…