swaprect

Swap two rectangular objects in video.

This filter accepts the following options:

'w'

Set object width.

'h'

Set object height.

'x1'

Set 1st rect x coordinate.

'y1'

Set 1st rect y coordinate.

'x2'

Set 2nd rect x coordinate.

'y2'

Set 2nd rect y coordinate.

All expressions are evaluated once for each frame.

The all options are expressions containing the following constants:

'w'

'h'

The input width and height.

'a'

same as w / h

'sar'

input sample aspect ratio

'dar'

input display aspect ratio, it is the same as (w / h) * sar

'n'

The number of the input frame, starting from 0.

't'

The timestamp expressed in seconds. It's NAN if the input timestamp is unknown.

'pos'

the position in the file of the input frame, NAN if unknown