Apply the Sobel operator (https://en.wikipedia.org/wiki/Sobel_operator) to input video stream.

The filter accepts the following option:

planes

Set which planes to filter. Default value is 0xf, by which all planes are processed.

scale

Set value which will be multiplied with filtered result. Range is [0.0, 65535] and default value is 1.0.

delta

Set value which will be added to filtered result. Range is [-65535, 65535] and default value is 0.0.