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Record a scene

The Recorder ships with its own recording interface.
From it, you can record a clip and add it as a scene to your project.

If you haven't done so, start the Remotion Recorder:

tsx
bun start
tsx
bun start

A Vite app will listen on http://localhost:4000.
Open this URL in the browser.
Give the page access to the webcam and microphone.

Select the composition​

Recordings need to be stored in a subfolder of public with the name of the composition ID.
For example, if you want to record for the composition my-video, recordings will be stored under public/my-video.

In the top right corner, use the dropdown to "Create a new folder".
Give it the same name as the ID of the composition you want to record for.
The folder will be created and your subsequent recordings will be saved in this folder.

Select sources​

In the top left panel, select your webcam and microphone.
In the top right panel, optionally select the screen you want to record.

You can record more sources, but out of the box, the Remotion Recorder does not do anything with them.

Before starting​

Say "Test One Two Three" and ensure the volume meter is not going into the red zone.

Make sure you are centered in the video. You can enable the crop target overlay to see how the video will crop when miniaturized.

Prefer making short recordings. You're less likely to make a mistake and it's easy to stitch them together.

There is no countdown – The recording will start immediately.
However, the Recorder will later automatically trim away the silence in the beginning.

Take a deep breath and think of what you are about to say and show.

You're ready to record!

Start the recording​

To start recording, press R or click
Start recording
in the top left corner.

Once you are done with the scene, click
Stop recording
.

Selecting a take​

After you have recorded a scene and you are happy with your take, click "Use this take".

The server will then do the following:

  • Convert the videos from WebM to MP4
  • Put them into your project under public/[composition-id].
  • Caption the files with Whisper.cpp

Discard a take​

If you have taken a recording that you don't want to use, click "Discard and retake" to clear the existing recording from memory.

record.remotion.dev​

You can also use the hosted version of the recoding interface at record.remotion.dev.

It will not allow you to select a save destination, but instead download the recordings to your Downloads folder.

They will have names like webcam171234567890.webm and display171234567890.webm.

To copy the recordings to your Remotion project and also convert them to MP4, first open copy.ts in your code editor. Set the prefix at the top of your file to the ID of the composition that you gave when you first created a new video.

copy.ts
ts
const prefix = "<id-of-your-composition>";
copy.ts
ts
const prefix = "<id-of-your-composition>";

Then run the copy.ts script whenever you want to save a take and immediately generate captions:

bash
bun copy.ts
bun sub.ts
bash
bun copy.ts
bun sub.ts

If you want to not use a take, just make another recording. The copy.ts script will only take the recordings with the latest timestamp.

Manually adding recordings​

You can also add recordings from other sources, like your phone.
Simply name the file webcam followed by any number, like 10, followed by one of the supported file extensions: .mp4, .webm, .mkv or .mov.

The order your recordings appear in your video is based on the number suffix. Here is a way you could structure your recordings:

txt
webcam10.mp4
display10.mp4
webcam20.mp4
webcam30.mp4
txt
webcam10.mp4
display10.mp4
webcam20.mp4
webcam30.mp4

If there is only a webcam recording with said number, the webcam will be fullscreen.

A display recording will only get picked up if there is also a webcam recording.
The webcam will be miniaturized in this case.

If you only have recorded a display, give it a webcam prefix nonetheless for it to get picked up.

Deleting a recording​

To delete a recording, simply delete locate the file in your public folder and delete them.
The Remotion Studio will automatically refresh move all other recordings to the next available number.

To prevent the settings from the scenes cascading, delete the scene in the default props editor as well.