I've run into a small problem. Using MAGIX movie edit pro i cant encode 4k video into a quick time movie (.mov) using the h264 codec. On selecting this the program goes back to the main screen and the encoding does not start. Can encode if i turn 'insert keyframe after every 15 frames' but that gives me a video with a black screen. HD files get encoded well enough.

Any suggestions on what to do. This seems to be my best bet in quick editing and upload.