FFmpeg 4.3.8
Since* 2.8
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Apply inflate effect to the video.

This filter replaces the pixel by the local(3x3) average by taking into account only values higher than the pixel.

It accepts the following options:

threshold0, threshold1, threshold2, threshold3

Limit the maximum change for each plane, default is 65535. If 0, plane will remain unchanged.

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Commands

This filter supports the all above options as commands.