Videos

session.camera records video on glasses that have a camera, like Mentra Live. startVideoRecording returns a recordingId; pass it to stopVideoRecording to end the clip.

src/background/index.ts

const { recordingId } = await session.camera.startVideoRecording({ fps: 5, save: true });
// … later …
await session.camera.stopVideoRecording(recordingId);

Camera needs the CAMERA permission and glasses with a camera. Declare a CAMERA permission and a CAMERA hardware requirement in your manifest, and check session.capabilities.hasCamera before calling.

Record

startVideoRecording resolves once the glasses report that recording started. Resolution and frame rate are optional. Omit them to use the device’s saved button-video settings. A lower fps (for example 5) keeps the glasses cooler and the file smaller on long recordings.

Option	Type	Default	What it does
`width`	`number`	device default	Video width in pixels.
`height`	`number`	device default	Video height in pixels.
`fps`	`number`	device default	Frames per second.
`sound`	`boolean`	`true`	Play start/stop capture sounds.
`save`	`boolean`	`false`	Keep the recording on the glasses after it finishes.

It resolves with a VideoRecordingStarted:

Field	Type	Description
`recordingId`	`string`	Identifier for this recording. Pass it to `stopVideoRecording`.

Upload the recording

stopVideoRecording(recordingId) resolves to void. By default the clip stays on the glasses. To send it somewhere, pass an uploadUrl and the glasses upload the finished recording there with a multipart POST (the file is the video part):

await session.camera.stopVideoRecording(recordingId, {
  uploadUrl: "https://your-server.example/clips",
  uploadAuthToken: "optional-bearer-token", // sent as the Authorization header if set
});

Option	Type	What it does
`uploadUrl`	`string`	Endpoint the finished recording is POSTed to. Omit to keep it on the glasses.
`uploadAuthToken`	`string`	Bearer token for the upload’s `Authorization` header, if your endpoint needs one.

Unlike a photo, the recording bytes don’t come back over the bridge: with an uploadUrl they go straight from the glasses to your endpoint, otherwise they stay on the device.

Errors

Every method returns a promise that rejects with { code, message } on failure. Wrap calls in try/catch and read code.

Code	When
`PERMISSION_NOT_DECLARED`	The miniapp didn’t declare the `CAMERA` permission.
`REQUEST_ABORTED`	The request timed out, or the session was torn down before it completed.
`INTERNAL`	The phone-side handler threw. The glasses have no camera, or another device error occurred. Read `message`.

For stills, see Photos, which also covers field of view. For live video streaming, see Streaming.

Getting Started

Core Concepts

UI Layer

Display

Audio & Speech

Sensors & Input

Camera

Phone & System

Data

Reference

Record

Upload the recording

Errors

​Record

​Upload the recording

​Errors

Record

Upload the recording

Errors