difficult greenscreen question

[Jim Dodson]

To elaborate on one of Darby’s suggestions:
I had incredible luck using temporal noise reduction on DVCPro HD footage that was very noisy when keying:

Adding the “remove grain” filter to your compressed footage will be a great help in reducing noisey keys — make sure you use “temporal filtering” as follows (from AE 7 help):

To add temporal filtering to a sequence
Apply the Remove Grain effect to your image.
Place the Remove Grain preview region over the area of the image that has the most subtle changes from frame to frame or that has the most moving image detail.
Select Enable in the Temporal Filtering controls.
Adjust the Amount value to 100%.
Create a RAM preview of the sequence or render it.
If you see unwanted streaking or blurs around moving objects, reduce the Motion Sensitivity value, and then preview or render it again.
Try the following techniques if you want to improve the results:
To quickly reduce the noise of a sequence that has a lot of buzzing noise, set the Noise Reduction value to zero and the Temporal Filtering Amount to 100%, and render the sequence.
To speed up previews, apply temporal filtering to your sequence after all the settings for a single frame have been adjusted.

Jim Dodson

8 Core Intel — Mac – OSX