Any broadcast colour filter tips?

Robert W wrote on 6/26/2008, 11:20 AM
I've got a large project with a lot of shots carried out in with colours and levels that look illegal (sometimes like over saturated analogue tape) on a lot of screens. I have been playing with the broadcast colours filter on my nested project to try and resolve this to some extent. I have been experimenting with setting the chroma levels as low as 75 with a smoothing factor of about 0.3. Is that likely to leave me within safe levels or could the smoothing let iffy levels creep through?

Also, is there any arbitrary minimum figure I should be aware of for setting the chroma limiter in the broadcast colours plugin? We do not want to make it look too black or white or washed out. And is chroma even the biggest factor? Should we be more concerned with the composite or luma levels?

Many thanks for any advice given here.

Comments

farss wrote on 6/26/2008, 1:54 PM
"Should we be more concerned with the composite or luma levels?"
Keeping luma within 0 to 100% is all I've ever worried about. I set smoothing to 1.0 on the highlights to avoid clipping them. Depending on what you've shot, on composite feeds things can look bad on the TV, more so certain color transitions with hard edges e.g. red to blue. Not much you can do about it.
The video systems handle natural colors pretty well. The best approach to avoid problems is to wrangle what's in front of the camera or any graphic elements that you add in post although today with composite video connections to CRT TVs slowly disappearing these issues seem less of a problem.

Bob.

GlennChan wrote on 6/26/2008, 2:03 PM
What format or delivery medium is your footage going out to?

Broadcasters vary in the maximum composite IRE they allow, and DVD differs from analog formats like VHS. But 115 IRE for composite max should be safe in most situations.
Or just start with the conservative preset. Select the 7.5 version or the not 7.5 version depending on the TV standards in your country.

2- Do check that your levels are correct.
http://www.glennchan.info/articles/vegas/colorspaces/colorspaces.html