Re: Masters "Rejected" for choma out of legal

AFAIK... you should not be looking at the vectorscope to determine legal levels. Look at the waveform monitor with the lpass or low pass filter off. That will let you look at the composite signal (the luma and chroma modulated together).

There is a limit to how high the composite signal can get. Usually it is 115 IRE, but it can vary from broadcaster to broadcaster and some put the limit lower.

2- Some people just run their video through a video legalizer. If you have broadcasters that sets the limits differently then you can put different settings in the video legalizer.

The one thing you really have to watch out for is user error- make sure you patch the video through the legalizer (including when you do insert edits).

2b- Some NLEs also have legalizers built in. Though they may have bugs... e.g. Final Cut had a bug where the broadcast safe filter wouldn't render when you actually render the video. So it looks like you have legal video but you actually don't.
Software scopes may also be inaccurate (e.g. FCP doesn't seem to consistently show superblacks).

I don't have much experience with this (2b) approach.