Inside Quartz Composer, there is a demo application that can add effect to your movie. This demo application is called MovieFX and can be found in Mac HD ▸ Developer ▸ Examples ▸ Quartz Composer ▸ Applications ▸ MovieFX.
After you've been inside MovieFX folder, you should search for MovieFX.xcodeproj file. Open that file with XCode and from XCode toolbar, choose Build and Go.
Up to this point, you should be able to see new pane opened with entitled MovieFX.
Before starting, you need to drop QuickTime Movie file you want to be processed. After that, you can select 1 of 61 effects you want to use. From those effects, I only like 18 effects though.
Those effects I like are Black & White, Color Controls, Color Invert, Color Pencil, Compound Eye, Crystalize, Exposure Adjust, Flip-Flop, Gamma Adjust, and Glow, as shown on the short video below.
And the rest are Kaleidoscope, MagicBall, Mirror, Monochrome, Neon, Sepia, Spotlights, and X-Ray.
Don't forget to export your movie after changes are made.
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