This filter allows to apply main morphological grayscale transforms, erode and dilate with arbitrary structures set in second input stream.

Unlike naive implementation and much slower performance in erosion and dilation filters, when speed is critical morpho filter should be used instead.

A description of accepted options follows,

mode

Set morphological transform to apply, can be:

• erode
• dilate
• open
• close
• gradient
• tophat
• blackhat

Default is erode.

planes

Set planes to filter, by default all planes except alpha are filtered.

structure

Set which structure video frames will be processed from second input stream, can be first or all. Default is all.

The morpho filter also supports the framesync options.