No, i thought on that thread there was someone who gave some links to some PC programs that would do it. If theres nothing on that thread just do a search on versiontracker.com and if there's anything it will show up
Probably been posted elsewhere, but videohelp.com is probably the best resource for info on converting and manipulating video formats. Most of the site is Windows-centric, but you can find some good mac stuff if you poke around. But I find that I use my old PIII PC to run the numerous shareware programs that support video conversion.