Video Assembly Fit
video-assembly-fit
Controls how a segment with a different aspect ratio is scaled to meet the output canvas.
| Value | Effect |
|---|---|
crop (default) | Center-covers the canvas — no letterbox, content may be cropped |
fill | Letterboxes over black bars |
blur | Letterboxes over a blurred, full-bleed copy of the segment itself |
video-assembly-fit applies during segment normalization — before the assembled result is processed by your request-level w/h/fit/ar params, which apply once to the assembled output.
blur is the best choice for vertical phone footage meeting a 16:9 program — the blurred backdrop fills the pillarbox with content rather than black, matching popular social platform aesthetics.
video-assembly-fit is a global parameter — it sets the same fit mode for all segments and does not support per-segment [N] indexing.