Clip playing lags also in exported video
While working on my short film I decided to export the 7 minutes I got to see if the pacing and framing of all the shots was right. While watching the exported video sadly I noticed some videos lagging, some videos showing only 1 frame for its entire length, and most doing just fine.
I decided to check if the problems in the video were also in the editor, and sure enough, the same videos with those problems in the exported video were behaving the same way in the editor.
Re-opened the project and went through the timeline, and noticed the same problems (lags/only showing 1 frame) but on different videos/moments.
My conclusion is that Quicktime can't run all the ProRes.mov files all at the same time, and depending on what videos I have taken a look at inside the editor, some clips are being played fine and others aren't.
This means I will NEVER be able to export my film without about 1/8 of the clips lagging/only showing 1 frame, making my film unwatchable.
How do I fix this? I can finish the film but it will never be perfectly watchable this way.
HitFilm 2 Express
Nvidia GTX 750 Ti
Intel i5 4590
Quicktime32 bit (no 64 bit seems available).