Multithreaded video conversion programs?

Try iSquint which is free. But it is only to mp4.
http://www.isquint.org/

For more formats get VisualHub
http://www.techspansion.com/visualhub/

or as an alternative: ffmpgx
http://homepage.mac.com/major4/

 

Is Handbrake not multithread capable?

 

According to their homepage:

It doesn't say WHAT operations are multithreaded (could be 1 UI thread and 1 processing thread), but I doubt they would make this claim unless they meant video conversion can be done on multiple threads simultaneously.

Encoding a dual pass, 1000bit VBR h.264 DVD on my old Powermac takes about 2 days...so needless to say I've not experimented with Handbrake too much.