I am editing a timelapse sequence in Final Cut Pro using both 1920x1080 and 5184x3456 prores 422(HQ) clips. The output resolution is Full-HD and I use a few digital zooms and pans. When I export from FCP, the output file plays fine and with no hiccups. After encoding to h.264 using mpeg streamclip I run into some problems. The cuts between the 1920x1080 and 5184x3456 clips generate leftover frames and the video seems to pause for a split second. Any ideas what´s causing this ?