PiP Alignment

Controls the edge alignment of the picture-in-picture overlay within the video frame.

video-mark-align accepts a comma-separated pair of vertical and horizontal alignment values.

Vertical values: top, middle, bottom

Horizontal values: left, center, right

video-mark-align=bottom,right

Use video-mark-pad to add inset from the aligned edges. Use video-mark-align[N] for a specific overlay layer.