Stylize

Posterize effect for video

Flatten the picture into a few steps of each colour, like a screen print.

Shown on Rafting on the Rogue River

Before · the same request without it

After · Flatten the picture into a few steps of each color, like a screen print.

The entry

Add it to a clip's effects list. Entries run in the order you write them.

{
  "type": "posterize"
}

Settings

Name	Accepts	Default	What it does
levels	2 to 48or keyframes	4	How many steps each colour channel keeps. 2 to 6 is a poster, above 16 is barely visible.

Run it

The whole request behind the render above. Paste it as it is, or swap the file for your own.

TypeScript SDK cURL

import { createClient, outputUrl } from "@rendobar/sdk";

const rb = createClient({ apiKey: process.env.RENDOBAR_API_KEY });

const job = await rb.jobs.run({
  type: "compose",
  params: {
    schemaVersion: 1,
    output: {
      format: "mp4",
      resolution: {
        width: 960,
        height: 540
      }
    },
    timeline: {
      tracks: [
        {
          clips: [
            {
              asset: {
                type: "video",
                src: "https://cdn.rendobar.com/compose/showcase/media/river.mp4"
              },
              start: 0,
              effects: [
                {
                  type: "posterize"
                }
              ]
            }
          ]
        }
      ]
    }
  },
});

console.log(outputUrl(job));

Install with npm i @rendobar/sdk. jobs.run() submits and waits, so it returns the finished job in one call.

curl https://api.rendobar.com/jobs \
  -H "Authorization: Bearer $RENDOBAR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"type":"compose","params":{"schemaVersion":1,"output":{"format":"mp4","resolution":{"width":960,"height":540}},"timeline":{"tracks":[{"clips":[{"asset":{"type":"video","src":"https://cdn.rendobar.com/compose/showcase/media/river.mp4"},"start":0,"effects":[{"type":"posterize"}]}]}]}}}'

Returns immediately with a job id. Poll GET /jobs/{id} or register a webhook rather than blocking on the request.

Questions

What does the posterize effect do in compose?

Flatten the picture into a few steps of each colour, like a screen print. Flatten the picture into a few steps of each color, like a screen print.

How do I add posterize to a video with an API?

Send a compose job to the Rendobar API with this entry in the timeline: {"type":"posterize"}. Add it to a clip's effects list. Entries run in the order you write them. The request on this page is complete and renders as shown.

What are the default settings for posterize?

Every setting has a default, so the type on its own is enough: levels 4. Set only the ones you want to change.

Footage and sound

Rogue River rafting (22717455715).webm, by Bureau of Land Management, Oregon and Washington. Public domain.
Loyalty Freak Music - 04 - Sweet Sun.ogg, by Loyalty Freak Music. CC0.

Camera shake Handheld energy on a steady shot. The frame's edges never show. Glitch Digital break-up for a beat or a scene change, kept light enough that the shot underneath still reads. Pixelate Large square pixels over the whole picture. RGB shift Red and blue pulled apart sideways for an analog edge, kept to a fringe so the shot underneath still reads. Scan lines The dark lines of a CRT monitor. Sketch The picture as a pencil drawing.

See all 77 in the effects reference →