Watermark Start Time

Sets the time in seconds at which the image watermark appears in the video. Before this time, the watermark is not visible.

mark-start accepts a float value in seconds from the start of the video. The default is 0 (visible from the beginning). Use mark-start[N] for a specific watermark layer.

Setting mark-start opts the watermark into the animated rendering path. Combine with mark-end to define a visibility window, and with mark-transition to animate the entrance.

A bare mark=logo.png without any window or transition parameters renders exactly as before — always on, no animation. The animated path is fully opt-in.