Transpose rows with columns in the input video and optionally flip it.

It accepts a parameter representing an integer, which can assume the values:

0

Rotate by 90 degrees counterclockwise and vertically flip (default), that is:

L.R     L.l
. . ->  . .
l.r     R.r

1

Rotate by 90 degrees clockwise, that is:

L.R     l.L
. . ->  . .
l.r     r.R

2

Rotate by 90 degrees counterclockwise, that is:

L.R     R.r
. . ->  . .
l.r     L.l

3

Rotate by 90 degrees clockwise and vertically flip, that is:

L.R     r.R
. . ->  . .
l.r     l.L