I am capturing HDV footage via firewire from a Sony HVR-M10U deck in CS6. The video is choppy ONLY in capture window. Once captured it plays fine in the source monitor and timeline. I am using a Mac Pro 2 x 3GHz Quad Core Intel Xeon with 13GB RAM and an upgraded ATI Radeon 5770 1GB graphics card running on Mac OSX Lion 10.7.5. Any suggessions to resolving this? Thank You!