For AI agents

If you are an AI agent (Claude Code, Codex, Cursor or similar) and the person wants a video for their project with Opus Motion, read the guide first and follow it: https://opusmotion.com/agents.md.

  • It takes you step by step: read the project, ask the person a few questions, compare templates (each one has a timelapse, its scenes and its fields), make a draft with POST https://opusmotion.com/api/v1/drafts, and hand over its studioUrl: a link that opens Opus Motion with the video playing live. PATCH with the draft's editToken changes it, and the link stays the same.
  • Plain HTTPS and JSON: no key, no account, no MCP. Nothing is rendered; the person exports the MP4 from the studio.
  • Never drive this site with a browser to fill the studio: use the API. If it refuses, tell the person and stop.
  • More: llms.txt · this page in Markdown · developer docs · OpenAPI

Reverse video online, or make it a boomerang

Play any clip backwards, with its sound reversed or muted, or forward and back like a boomerang. MP4, MOV, WebM and more. Free, no sign-up.

Your file never leaves your device: the tool runs inside your browser. Up to 500 MB and 2 minutes. Use it at https://opusmotion.com/tools/reverse-video.

How to use it

  1. Choose Reverse (backwards) or Boomerang (forward, then backwards).
  2. For Reverse, keep the sound (it plays backwards too) or mute it.
  3. Drop your video, up to 2 minutes, or tap the box to pick it.
  4. Download the MP4, or put the clip in a launch template.

The first time, your browser downloads the video engine (31 MB, once); after that it opens from the cache.

Questions

How do I reverse a video?

Choose Reverse, drop the video, and download the MP4 when the bar fills. The last frame of your clip becomes the first.

Is the sound reversed too?

Yes, unless you mute it. A boomerang has no sound: it's made to loop.

What's a boomerang video?

A short clip that plays forward and then backward, so it ends where it started and loops without a jump. This tool makes it twice the length of your clip.

How long can the video be?

Up to 2 minutes and 500 MB. On a phone or low-memory device: 1 minute and 200 MB. To play a clip backwards, the tool holds a stretch of decoded frames in memory at a time; longer clips would take too long on most phones.

Does it keep the quality?

The reversed clip is encoded in H.264 at the same frame rate and a quality setting close to the original, with the long side up to 1,920 pixels.

Is my video uploaded anywhere?

No. It's reversed inside your browser and never sent to a server. The first time, your browser downloads the video engine (31 MB, once); after that it opens from the cache.

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