Fill Foreground Zoom

Scales the foreground video within the fill canvas. At 100 (the default), the video fits within the box exactly — the standard fit=fill behavior. Values above 100 enlarge the foreground, shrinking the border; values below 100 shrink the foreground, creating a border on all sides.

fill-zoom accepts an integer from 10 to 1000 (percent). Applies only when fit=fill or fit=fillmax is used.

When fill-zoom exceeds the point where the foreground covers the full canvas, the edges are cropped — the behavior becomes equivalent to fit=crop. The crop position follows fill-align or fill-x / fill-y.