Vertical lines and red light...

Andrew B wrote on 12/14/2006, 1:08 PM

Howdy folks!
I recently recorded a live theatrical performance where the lighting guys REALLY liked RED. Aside from messing up our video, I have noticed some strange vertical lines showing up. We shot everything in widescreen format using a Sony PD170 & VX2000, plus a Sony DSR370 in 4:3 format (converted to widedscreen in Vegas).
When the lighting was good, the footage looks GREAT, but when there is an overabundance of red light, the details got blown out, and those strange vertical lines appear. I have looked at the footage captured directly into Vegas via firewire and they are there. They look like they are caused by compression, but I don't think I am compressing anything! Has anyone else had this issue?
Again, they are mostly in the low light areas...
Sorry for the lame description! I am new to this stuff...

Andrew

Comments

GlennChan wrote on 12/14/2006, 1:30 PM

DV has limited chroma resolution (reduced by 4 horizontally), and this will show up when you have strong reds. You can reduce this somewhat by applying a chroma blur of 2.0 horizontally.

2- Colors blowing out: perhaps using the secondary CC and lowering saturation might help?? (Just a wild guess.) This might bring detail back?

Andrew B wrote on 12/14/2006, 2:21 PM

WOW! That made a tremendous difference!
(Your wild guess on the saturation levels was right on the money too!)
I tried some color correction, but your saturation suggestion did the trick. I am rendering one scene now so we will see the results in about 30 minutes or so...

Thank you so much!!!

Andrew

GlennChan wrote on 12/14/2006, 5:12 PM

Neat- I didn't know if that would work or not (not having that footage and not having tried it and such). I'm glad that worked.