I posted something about this a while ago but now its different. I do editing for weddings etc and the latest one was filmed on a 5D Mk2. The video stutters very badly on my MacBook Pro. I usually use all forms of video and some have VERY high bit rates and are very large. I have never had a problem playing a file before. There is a lot of panning and tilting in the footage. I have heard others say that even though my computer cannot properly display it, it will be fine on youtube. I tried and it looks worse. I have 8 GB ram and an SSD with plenty of space left. I have tried converting the footage to ProRes and exported many many different ways. Is there anything I can do? I tried exporting out of AE, Premiere Pro, Final Cut even iMovie and still there. Sometimes in Premiere if I pre render the project it plays smoothly but after export it's back to jerks and stutters. Anything I can do? Please Help! Thanks.