Did you know quicktime it self can be used for cut and paste edits? it can also convert between nearly all of the video codecs? you may need quicktime pro for it to function but it works very well! it's also has an open image sequence function in which you pick the frame rate which is how I made these two videos using k10d:
YouTube - Strobes YouTube - High Speed Photography
FYI The canon 5d mk II shoot video at:
1920 x 1080 (16:9) up to 12 mins (Quicktime 1080p H.264; 38.6 Mbits/sec)
• 640 x 480 (4:3) up to 24 mins (Quicktime 480p H.264; 17.3 Mbits/sec)
• Max file size 4 GB
• Quicktime MOV format (H.264 video, PCM sound)
• 30 fps
I don't think 38.6 Mbits/sec is going to have chunky artefacts eh?