Sharpen or blur the input video.

It accepts the following parameters:

luma_msize_x, lx

Set the luma matrix horizontal size. It must be an odd integer between 3 and 23. The default value is 5.

luma_msize_y, ly

Set the luma matrix vertical size. It must be an odd integer between 3 and 23. The default value is 5.

luma_amount, la

Set the luma effect strength. It must be a floating point number, reasonable values lay between -1.5 and 1.5.

Negative values will blur the input video, while positive values will sharpen it, a value of zero will disable the effect.

Default value is 1.0.

chroma_msize_x, cx

Set the chroma matrix horizontal size. It must be an odd integer between 3 and 23. The default value is 5.

chroma_msize_y, cy

Set the chroma matrix vertical size. It must be an odd integer between 3 and 23. The default value is 5.

chroma_amount, ca

Set the chroma effect strength. It must be a floating point number, reasonable values lay between -1.5 and 1.5.

Negative values will blur the input video, while positive values will sharpen it, a value of zero will disable the effect.

Default value is 0.0.

alpha_msize_x, ax

Set the alpha matrix horizontal size. It must be an odd integer between 3 and 23. The default value is 5.

alpha_msize_y, ay

Set the alpha matrix vertical size. It must be an odd integer between 3 and 23. The default value is 5.

alpha_amount, aa

Set the alpha effect strength. It must be a floating point number, reasonable values lay between -1.5 and 1.5.

Negative values will blur the input video, while positive values will sharpen it, a value of zero will disable the effect.

Default value is 0.0.

All parameters are optional and default to the equivalent of the string ’5:5:1.0:5:5:0.0’.