Thanks Floh for this. So it could be that. I just talked to a technician that explained me that it’s a typical sync problem when using internal clock of the mac rather than external (USD). What i don’t understand is that i never had any problem in PAL mode. It sounds like thatHe told me also about this function i didn’t know in PT which is Bounce to Quicktime that can help. I’ll give a try.
Maybe, but the “the progressice desync” is so huge (3 sec at the end of the timeline) that it’s more like a 25 to 30 fps gap. I just can’t figure it out at the moment and con’t see any special settings for NTSC in PT ???