Pad resize

Fit a video into fixed dimensions with padding and a background color.

cm_pad_resize scales a video to fit inside a fixed box and pads the empty space so the full frame stays visible. Set the padding color with bg_ to avoid black letterboxing. Use it for consistent card sizes and fixed aspect-ratio layouts.

How to use it?

Set the box with w_ and h_, add cm_pad_resize, and choose a padding color with bg_. The example below fits the source into a 400×400 px box (w_400,h_400) with white padding.

https://assets.autorender.io/LOKVTtKVGb/w_400,h_400,cm_pad_resize,bg_white/doc/skateboarding.mp4

Token	What it does
cm_pad_resize	Resize to fit the box and pad to the exact dimensions
bg_{color}	Padding color as a name (bg_white, bg_black), hex (bg_FF0000), or blur (bg_blurred, bg_blurred_10)

Pair a blurred background (bg_blurred) with cm_pad_resize when you want the padding to echo the video instead of a flat color — it keeps a widescreen clip looking intentional inside a square card.

Next steps

Resize & aspect ratio

Compare pad resize with the crop fit mode and ratio tokens.

Video overview

Every video transform token in one reference.