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Color Stabilizer Problem
Hello
I have been searching through the After Effects forums but have not managed to discover anything relating to the problem I have when using the ‘Color Stabilzer’ effect.
The comp I was working on was a JPEG sequence of blue sky and fluffy clouds to produce a video time lapse sequence. As the blue of the sky was noticeably flickering I applied the color stabilzer but as soon as I applied it to the JPEG sequence the image immediately changes colour resembling an inverted effect. If I click ‘set frame’ it reverts to the correct colour and then I go ahead I choose levels and set the black and white points then click ‘set frame’
Unfortunately the rest of the sequence completely changes colour exhibiting the inverted effect similar to a high pass filter in Photoshop look on some shots with many appearing solarised or extreme contrast and with massive shifts in hue and saturation. I just cannot get the color stabilzer to work on the JPEG sequences I import.
I’m hoping it is purely down to me doing something wrong so any guidance would be most welcome.
I’m using After Effects CS3 (8.0.2.27) on an Intel Mac Pro dual 2.66 Ghz with OS X 10.5.4 and Quicktime 7.5. The JPEG’s were exports from Lightroom as they were originally RAW files shot on a Canon EOS 1Ds Mark II. I resized them to 1920 pixels width on export as sRGB 72dpi, quality level 65 and my comp was 1920 x 1080 25 frames per second progressive.
Bye – Ged Yeates (Scotland)
Ged Yeates – Lighting Cameraman
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3 Replies
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Are the black and white points that you select moving around? You can animate these to follow along with the points you set. Also, if your footage is grainy you’ll want to increase the sample size.
You said that the blue of the sky was flickering, does this just mean the exposure? You may want to try just using the brightness setting. Levels in best for when the overall contrast, not exposure is changing.
Good luck!
Grant Swanson
Visual Effects Supervisor
Video Apex – Minneapolis, MN
videoapex.blogspot.com -
I’d suggest you go back to PS and run some of the automatic adjustment scripts. I hate Photoshop with a deep passion so I also suggest you find a PS wonk to handle it for you.
But you do not indicate whether or not you have rendered the JPEG sequence into a movie. That might help with that particular filter, dunno for sure. I have used Color Stabilize on many DV video files where a sodium vapor lighting system flickered in and out of sync with the shutter producing a pusing green to pink color shift. The filter worked like a charm.
bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
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Hello
Thanks for the suggestions, I will give them a go. My apologies fornot mentioning the renders, I did indeed render them out to Quicktime movies. I tried rendering out a 1920 x 1080p movie and a PAL 50i movie in the Animation and ProRes 422 (HQ) codecs. Unfortunately both displayed the flickering blue sky.
Each shot was taken with the same exposure, shutter and white balance setting at 15 second intervals of the period of one hour.
I am beginning to wonder if it is something peculiar to the JPEG sequences I’ve imported (I’ve tried three different sequences) as the filter works like a dream on video footage I’ve tested it on.
Thanks for your replies, they were very welcome – Ged Yeates (Scotland)
Ged Yeates – Lighting Cameraman
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