Watermark

The mark parameter allows you to overlay an image onto your video. You can control the watermark’s position, size, and transparency using additional parameters like mark-align, mark-alpha, mark-w and more.

Watermarks can also be animated with entrance and exit transitions. Use mark-start and mark-end to define a visibility window, and mark-transition to animate the watermark in and out. A bare mark=logo.png without any of these parameters renders exactly as before — always on, no animation. Transitions are fully opt-in.

Multiple Watermarks

Video image watermarks support up to 4 simultaneous layers. The bare mark parameter defines layer 0. Additional layers use the [N] index syntax, where N is 1–3. Every mark-* parameter accepts the same [N] suffix — the one exception is mark-base, which is shared across all layers.

https://assets.imgix.net/video.mp4?fm=mp4
  &mark=logo.png&mark-w=140&mark-align=bottom,left
  &mark[1]=rating.png&mark-w[1]=90&mark-align[1]=top,right&mark-alpha[1]=80

Layers composite bottom-to-top in index order — mark is drawn first, mark[1] on top of it, and so on. A layer with no resolved mark[N] URL is simply dropped.

This is a different mechanism from video-mark[1] (Picture-in-Picture), which overlays a second video or animated GIF — with its own timing and audio controls — rather than a static image, and is capped at 2 layers. Both families can be used together in the same render.