FFmpeg 4.3.8
Since* 4.3
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Pick median pixel from certain rectangle defined by radius.

This filter accepts the following options:

radius

Set horizontal radius size. Default value is 1. Allowed range is integer from 1 to 127.

planes

Set which planes to process. Default is 15, which is all available planes.

radiusV

Set vertical radius size. Default value is 0. Allowed range is integer from 0 to 127. If it is 0, value will be picked from horizontal radius option.

percentile

Set median percentile. Default value is 0.5. Default value of 0.5 will pick always median values, while 0 will pick minimum values, and 1 maximum values.

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Commands

This filter supports same commands as options. The command accepts the same syntax of the corresponding option.

If the specified expression is not valid, it is kept at its current value.