KinoPipe
Start for free
All toolsmerge videos API

Merge Videos with an API

Join two to six video clips into one normalized, playback-ready MP4. Run the preset directly on this page or call the same agent-ready endpoint from your product.

Run this tool View API recipe

Prefer the shell? Merge videos with FFmpeg, the verified FFmpeg command for this edit.

LIVE TOOL
Run merge videos
Drop a video, adjust the defaults if you need to, and download the result here.

or ·

Already have an account? Sign in

BEFORE / AFTER

See what the tool changes.

A real example: the after side is the unedited output of a KinoPipe job. Run the live form above to generate the same result from your own media.

BeforeSeparate clips
CLIP 1
CLIP 2
2 source files
AfterOne timeline
Ready
1 normalized MP4 · 00:15

Demo footage: public-domain timelapses (Bureau of Land Management, Oregon · NASA SVS). Processed by the same pipeline the API and MCP tools call.

Useful defaults, typed options.

The tool slug stays stable while your agent supplies named media inputs and a narrow set of documented options.

  • Two to six input clips
  • Mixed source sizes supported
  • One stable MP4 output
What this preset does
  1. 01Download every clip
  2. 02Normalize size and frame rate
  3. 03Preserve or synthesize audio
  4. 04Join clips in the supplied order
Stable endpointPOST /api/v1/tools/merge-videos
Live API request
{
  "inputs": [
    { "id": "main", "url": "https://example.com/intro.mp4" },
    { "id": "clip-2", "url": "https://example.com/demo.mp4" }
  ],
  "options": { "aspect_ratio": "16:9" }
}
Successful output example
{
  "result": {
    "output": {
      "filename": "merge-videos-output.mp4",
      "contentType": "video/mp4",
      "byteSize": 437021,
      "downloadUrl": "https://cdn.kinopipe.com/…"
    }
  }
}

Know the boundaries before you run.

Supply between 2 and 6 public video inputs.
Clips are normalized to one size and 30 fps.
Silent audio is synthesized when a clip has no audio.

About merge videos

Yes. KinoPipe scales and pads every clip to the selected aspect ratio before joining them.

The tool inserts silence for that clip so the final audio timeline stays synchronized.

Related media tools

Split Video into Equal Parts by API

Divide one video into independently playable MP4 segments of a chosen duration.

Explore

Create Picture-in-Picture Video

Place a facecam, demo or secondary video over a main video in one request.

Explore

Add Music to Video Online or by API

Mix background music with the source audio or replace the original soundtrack.

Explore