small black spots where overexposed and color corrected

[Ivan Myles]

Please post a frame shot of the source footage before the effects were applied; I’d like to look at it through the scopes. Also, it would be helpful if you listed the effect settings that were used, or just post a screen shot of the effects panel.

[Tim Kolb]

You may want to try using a luma curve instead of the Fast CC to “roll off” those highlights vs chop them off?

TimK,
Director, Consultant
Kolb Productions,

Adobe Certified Instructor

[Dan Mcmahon]

Thank you for the help,
Iʻm posting two screen shots. this one does show the problem.
I redid the sequence using the broadcast safe and then fast color corrector and the spots do not show up on my monitor, but they did in the blu-ray. these spots are always in motion popping in and out. The 1st time before I rendered they where about 3 times as large.
I did bring the highs below 100. in fact that seems to be my problem.
Iʻm trying to bring more detail into the couples faces, you can see the problem with darker skin and Maui sun behind them
Thank for any help Dan

[Ivan Myles]

Thanks for posting the images. The block dots are perplexing, but overall the color correction looks straightforward. Your source footage is recorded in Y’CbCr format, which covers a range from approximately -7 to 109 on the Y-curve. Adjust output black and white levels until the Y and RGB curves range between 0-100:

– Disable or clear the effects already applied to your clip
– Insert a new instance of the Fast Color Corrector
– Set Output Levels to 16-235 (0-235 will probably be with this footage, too); Adjust further if required.

There are a few ways to increase the brightness of the bride’s face. First try adjusting Input Gray Level on the Fast Color Corrector. If that doesn’t work satisfactorily, use the Luma Corrector to adjust Master gamma or Midtone gamma/gain.

If the black dots still appear, try disabling all effects. Hopefully the black spots will disappear. Turn the effects back on one at a time until the black points reappear.

There are some great tutorial videos on this website regarding Premiere Pro color correction.

[Dan Mcmahon]

Thank you for the info.
Here is a twist I only have the problem when I add the fast color corrector. There are no black dots on the raw footage. But I just added the filter without changing anything, it should have no effect, but I have black dots, just by loading the effect???
Iʻm using a 8core tower with a Nvidia GeForce GT 120 512MB card. No mercury playback. could this be the problem??
Dan

[Ivan Myles]

Is the broadcast safe filter disabled?

[Ivan Myles]

The black spots indicate unsafe areas that were keyed out by the Broadcast Color effect. Use the Fast Color Corrector or Luma Curve effect to reduce the output white level to 235 or less. Apply Broadcast Colors after the color correction effects, set “Maximum Signal Amplitude (IRE)” to 100, and change “How to Make Color Safe” to “Reduce Luminance” or “Reduce Saturation.”

Please refer to Adobe Help for more information on the Broadcast Color effect.

[Dan Mcmahon]

Thank you all for your responses and helping out.
Unfortunately I had already tried what was suggested.
fortunately I found out the answer. When I moved the project to my laptop I had no black spots?
The problem is related to my 8 core machine.
But this is a huge problem because that is my main editing setup.
Any Ideas on a hardware problem that would cause these black spots?
Thanks again for the help, and again this does not look like a filter problem.
Dan
Processor 2 x 2.26 GHz Quad-Core Intel Xeon
Memory 12 GB 1066 MHz DDR3 ECC
Graphics NVIDIA GeForce GT 120 512 MB
Software Mac OS X Lion 10.7.5 (11G63b)