Ey TALink87​, easy solution. When you make screen capture in Quicktime and in the most screen captures applications, the final video you have it'll be in Variable Frame Rate (VFR) and you have to do this. Open the captured video file in Quicktime player and press Cmd + I and see CPS framerate. In my case is 29,97, but surely you have less than me. Then, import the captured video in PrPro and right clic, choose Modify / Interpret Footage... Choose "Assume this frame rate:" option and put the CPS framerate that you see in Quicktime player, then Ok. The video now it's ok but the audio maybe it's have an issue, do this: Go to the Quicktime player, open the same captured video and choose File / Export As... / Audio solo... And then you sync this audio with your video and that's all. Regards!
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