Do you have hardware MPE turned on? Turn it off and try rendering that segment again.
Thanks for the fast answer, Jeff.
I opened project settings to disable hardware acceleration and playback, but the "Video rendering and playback" dropdown menu is grayed out and says "Mercury playback engine software only", so I think it's already disabled and I couldn't enable it even if I want to.
In the export panel, select both the Maximum Render Quality and Maximum Bit Depth options, and attempt your export again. Any better?
Thanks you too, Colin, you gave me a useful hint even tho it worked inversely.
I had to disable Maximum Render Quality to make it render correctly!
Thanks to the both of you, anyway, problem solved!
Yes, I've been exploring and documenting issues like this with the MPE acceleration. While disabling MRQ will give you more the results you're after, you might also try leaving MRQ enabled and also turn on Maximum Bit Depth; the results might be better (or worse--depends on your perspective).
Well, I was in a hurry solving the problem that made my rendered video look terrible.
Now I can explore some way to make it look even better!