been transfer vhs-c tapes thru a canon hv 20 minidv camcorder to my imac. tapes about 10 years old. 90 %look pretty good, but i have 2 that seem "jumpy". they were all done on same camcorder and im doing everything the same for the import process. it seems as if the tape is freezing up here and there with alot of static. any suggestions? besides going back in time and using better equipment. thanks