---
title: "Update Overlay Clip Timing"
method: PATCH
path: "/api/projects/{project_id}/overlay-clips/{clip_id}/timing"
---

# Update Overlay Clip Timing

`PATCH /api/projects/{project_id}/overlay-clips/{clip_id}/timing`

Update overlay clip timing — translates to the source Video's crop fields.

Crop/trim lives on the source Video (crop_start_ms, crop_end_ms) rather than
on the OverlayClip. trim_start_ms → source_video.crop_start_ms;
duration_ms → implies crop_end_ms = source.duration - trim_start - duration.

## Path parameters

- `project_id` string, required
- `clip_id` string, required

## Request body

- UpdateOverlayClipTimingRequest — Request schema for updating overlay clip timing (trim + duration)
  - `trimStartMs` integer — Trim offset into source video (ms)
  - `durationMs` integer, required — Visible duration on timeline (ms)

## Response `200`

Successful Response

- object

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/latted/apis/motion-graphics-designer-api.md) · [All operations](https://skmtc.dev/latted/apis/motion-graphics-designer-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/latted/motion-graphics-designer-api/revisions/36d149b525df/schema)