I've been spending weeks trying to figure out the perfect workflow for my gear / editing system. This is my last step. Putting two clips shot from two different cameras into a multi clip sequence to edit. Once i create the multi clip it seems to play for about 5 sec before stopping completely. This worked before and i don't understand why it's not now. I used to work with HDV footage but after researching and reading i saw that it's best to work with apple pro ress while editing. So i have about 400 gig of footage i just converted all to apple pro ress and now i'm having lagging issues. Would this be the footage or my machine? Whats the deal with online or offline . proxy pro ress? not to sure what's next. Any ideas?