Crushed Whites

astorvick wrote on 6/16/2004, 8:48 PM
Hello everyone, This is my first time posting so take it easy on me. :-)

I have a small problem and thought that maybe some of you could help me. I
shot some video of some waterfalls and after putting it to DVD I noticed the
shades of white in the water were being cutoff once they reached a certain
level in brightness it would just display white blob in that area of the
waterfall, while the rest of the scence looked fine.
I connected the camera to my my svideo port on my TV and everything
looks like it should, the same goes for my Captured AVI files too, But when I
encode for DVD that's when I see the problem.
So I tried doing 2 passes when encoding and moved the 9bit coeificient to
10 bit, nothing seems to help.

Can somebody please tell me what is going on?

-Thank you

btw...My DVD player is a brand new sony

Comments

BillyBoy wrote on 6/16/2004, 9:16 PM
Instead of the why it happens (could be several reasons) the way to attempt to fix it would be to first bring up the scopes and take a look at the three way that has the vectorscope, histogram and waveform.

On the wavefrom see if any of the pattern is above 100. You can usually be safe up to 105 or so, but for a strong image I would keep it below 100. Next look at the histogram's far right portion. Use the gain and gamma on the Color Corrector to cut back. Since you only see it on a burned DVD i'd try buring a DVD-RW so you can reburn if needed and see if adjusting it down helps. There's also a legacy filter called broadcast colors that if applied will clamp off extreme levels.

The other possible soultion is to check whatever TV you're looking at. Its common for many people to have either or both the brightness and contrast cranked up too far.

Because you can make videos for the web and other stuff you can make videos that are too "hot" for TV and blow out whites or get oversaturated colors.
astorvick wrote on 6/16/2004, 9:46 PM
If I did have my contrast turned up, wouldn't it also show up when viewing through the svideo port?
Since I have a RPTV, I usually leave my contrast below 50%, I use Avia to make those settings. My main question is how come it's only viisble after a burn it to DVD.

Thanks for your help... I will look at the scopes.
astorvick wrote on 6/16/2004, 10:24 PM
I found the problem... There was a dynamic color setting that was turned on in my DVD player menu. Turned it off and POOF it works!!....

Thanks for your help !
John_Cline wrote on 6/16/2004, 11:48 PM
Now, I'm curious... did you calibrate your TV with the Avia disc with the dynamic color "feature" on your DVD player turned on?

John
astorvick wrote on 6/17/2004, 6:08 AM
LOL... I'm revisiting that question right now.