Problems with brightness shifting

[Jerry1964]

Hello

I was editing some film based material in Sony Vegas, when I noticed that every so many frames (it varies in different sections) there are random changes in what seems to be the brightness levels. The brightness seems to go up and down also affecting the color. The colors goes to normal to over saturated.

Is there some simple preset in Sony Vegas or After Effects that can make the entire video stay at one level? meaning if it senses a change or pulse change, it compensates for it.

Thanks

[edDV]

Explain how you captured this.
Sounds like Macrovision. If so, you can't fix it after capture.

[Epicurus8a]

Sounds like Macrovision. If so, you can't fix it after capture.

I second that!

[ella]

Hi,
I won't be so sure. If it were macrovision you would more likely could not capture it at all. Most video capturing cards detect macrovision protection and refuse capturing at all. In your case brightness changes show that capture card definitely see something and if it were protection I'm quite sure it would stop capturing with message like "Copyright materials" or something like that. Anyway if you want to take a chance you can try something like this http://www.xdimax.com/grex_faq/faq_howto.html#vccsvideo at least to detect a source of the problem.

[edDV]

Hi,
I won't be so sure. If it were macrovision you would more likely could not capture it at all. Most video capturing cards detect macrovision protection and refuse capturing at all.

While true for many recent consumer capture devices (or added through software updates), there are still many others that attempt capture and in the process whipsaw the AGC trying to follow levels without success.

[ella]

This should be an old cards. As far as I know today's standards require from video products manufacturers respect copy protection and detect different protections. Otherwise product can not be certified for US market.