Hi,
As you probably know, with VV3 there are problems in editing/rendering an MPEG-2 source file because some frames are mangled and turn black (sequences of 11 black frames are generated in the rendered video).
Do you know if in VV4 this issue has been fixed?
I've worked with a ton of MPEG files as the source. Almost always the cause is a corrupted source file. Not much you can do about that except remove the bad frames from the source.
If the source file is corrupted, I shouldn't be able to see the frames in the source video. With VV3, it is not like that and the Technical Service said that this is a major unsolved buf of VV3...
I've worked with tons of MPEG-2 video source too and I've never experienced such problems.