Render on Lambda

If you want to render long videos faster or you want to render different versions of your videos at the same time, you can take advantage of @remotion/lambda.

Setup Lambda

First you need to set up Remotion Lambda.
Follow steps 1-7 of the instructions shown here.

Deploy and render

:::note Your site will get a URL that is publicly accessible. Make sure to keep it private and do not share it with anyone. :::

Add the following function and site deployment commands as well as the render command into a shell script you can execute each time you want to render a video:

bunx remotion lambda functions deploy --memory=3009
bunx remotion lambda sites create --site-name=remotion-recorder --enable-folder-expiry
bunx remotion lambda render remotion-recorder <composition-id> --delete-after="7-days"

Explanation:

1. Deploy a Lambda function. Setting memory to 3009MB will give you 3 vCPUs. If the function already exists, nothing will happen, therefore it is safe to run the command every time.
2. Upload the Recorder and your Recordings to S3. Give the site the name remotion-recorder, you may choose a different name if you like. The --enable-folder-expiry flag will make it possible to render videos that automatically delete. If a site with this name already existed, it will update it.
3. Render the video. Pass the site name and composition ID to the command. The --delete-after flag will delete the video after the specified time, you may remove this flag if you want to keep the video.

Rendering for a specific platform

You may use --props to override the default props that you set in your composition.
Here is a script to render a video for all platforms:

bunx remotion lambda render --props='{"platform": "youtube", "layout": "landscape"}' remotion-recorder <composition-id>
bunx remotion lambda render --props='{"platform": "x", "layout": "square"}' remotion-recorder <composition-id>
bunx remotion lambda render --props='{"platform": "linkedin", "layout": "square"}' remotion-recorder <composition-id>

Our script

For rendering our videos, we create a TypeScript file and run it with bun lambda.ts.

import {$} from 'bun';

const siteName = 'our-recorder';
const compositionId = 'installwhispercpp';

const configs = [
  {
    canvasLayout: 'square',
    platform: 'linkedin',
  },
  {
    canvasLayout: 'square',
    platform: 'x',
  },
  {
    canvasLayout: 'landscape',
    platform: 'youtube',
  },
];

await $`bunx remotion lambda sites create --site-name=${siteName}`;

for (const config of configs) {
  await $`bunx remotion lambda render ${siteName} ${compositionId} --props='${JSON.stringify(config)}'`;
}