I’m not totally sure how to explain this issue so I’ve provided a link below to watch:
I have repeated a portion of the video played at slower and slower speeds. As you can see, around very bright areas, there’s shadows/highlights on the top-right and bottom-left of the object, and the shadow/highlight switches places every other frame. I assume this comes from a misunderstanding of the brightness info in the interlaced fields in the original video. I have tested this with a bunch of different footage from MiniDV cameras and get this issue every time. Is there a way to avoid this problem?