If you're seeing flickering, flashing, or shimmering on your video, you can do a number of things to reduce or eliminate it.
The flickering occurs primarily when there is slow zooming or panning motion on a photo with a lot of detail such as water, trees from a distance, or patterns on clothing.
If you find yourself with a photo that is showing unacceptable flickering, use the following techniques to reduce it.
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Enable adaptive blur on the particular photo having the problem (see Using adaptive blur).
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Enable motion blur on the entire movie when you render (see Using motion blur).
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Add more motion. Make one of your key frames larger and one smaller to add zooming or move the frames further apart.
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Eliminate motion. Make your key frames closer in size and/or position.
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Shift one or all of your key frames by a few pixels.
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Reduce the resolution of the photo using another application and replace it in the timeline.