Simple Vue Camera
A simple to use, but extensive, camera component for Vue 3 with Typescript support to create great camera experiences like this:
By default, this component does not render any UI elements on top of the video feed, so you can style it and make it your own.
Table of Contents
Installation
Install Simple Vue Camera with NPM:
npm install simple-vue-camera
or, with Yarn:
yarn install simple-vue-camera
After installation, you can register the Camera
component globally in main.ts
:
import { createApp } from "vue";
import App from "./App.vue";
import Camera from "simple-vue-camera";
createApp(App).component("camera", Camera).mount("#app");
or, register it to a specific component:
<script lang="ts">
import { defineComponent } from "vue";
import Camera from "simple-vue-camera";
export default defineComponent({
components: {
Camera,
},
});
Usage
Basics
After registering the Camera
component, you can use it as follows:
<template>
<camera :resolution="{ width: 375, height: 812 }" autoplay></camera>
</template>
Use the available slot to overlay UI on top of the video feed:
<template>
<camera :resolution="{ width: 375, height: 812 }" autoplay>
<button>I'm on top of the video</button>
</camera>
</template>
Snapshots
To create screenshots of the video feed, use the snapshot
function on the component reference:
<template>
<camera :resolution="{ width: 375, height: 812 }" ref="camera" autoplay></camera>
<button @click="snapshot">Create snapshot</button>
</template>
<script lang="ts">
import Camera from "simple-vue-camera";
export default defineComponent({
setup() {
// Get a reference of the component
const camera = ref<InstanceType<typeof Camera>>();
// Use camera reference to call functions
const snapshot = async () => {
const blob = await camera.value?.snapshot();
// To show the screenshot with an image tag, create a url
const url = URL.createObjectURL(blob);
}
return {
camera,
snapshot
}
}
});
By default, when creating a snapshot, the resolution of the snapshot will be the same as the resolution of the camera feed. To change that, pass a Resolution
with the function call:
const blob = await camera.value?.snapshot({ width: 1920, height: 1080 });
Or change the image type and quality:
const blob = await camera.value?.snapshot(
{ width: 1920, height: 1080 },
"image/png",
0.5
);
Camera
It is possible to change the camera. First request all videoinput
devices:
const devices = camera.value?.devices(["videoinput"]);
Pick a device, e.g. with a dropdown, and pass the device ID to the changeCamera
function:
const device = devices[0];
camera.value?.changeCamera(device.deviceId);
Note: When switching cameras, the camera component will restart and emit the loading
and started
events again.
Component information
Properties
Name | Type | Default | Description |
---|---|---|---|
resolution | Resolution |
1920 x 1080 | The resolution of the camera view |
facingMode | string |
environment | |
autoplay | boolean |
true |
Determines if the camera is automatically started when mounted, when set to false, you must start the camera programmatically |
playsinline | boolean |
true |
Determines if the camera plays inline instead of starting full screen, when set to false some browsers open a fullscreen video player |
constraints | MediaStreamConstraints |
Change the default constraints |
Functions
Name | Parameters | Description |
---|---|---|
devices | kinds: MediaDeviceKind[] |
Returns a list of compatible devices which matches the allowed kinds |
start | Starts the camera | |
stop | Stops the camera | |
pause | Pauses the video stream | |
resume | Resumes the video stream | |
changeCamera | deviceID: string |
Changes the selected camera |
snapshot |
resolution: Resolution , type: string , quality: number
|
Creates a snapshot of the current video image |
currentDeviceID | Returns the currently used device id of the mediastream |
Events
The Camera
component emits 7 different events.
<template>
<camera
@loading="loading"
@started="started"
@stopped="stopped"
@paused="paused"
@resumed="resumed"
@camera-change="cameraChange"
@snapshot="snapshot"
@error="error"
></camera>
</template>
<script lang="ts">
import Camera from "simple-vue-camera";
export default defineComponent({
setup() {
const loading = () => console.log("Camera is loading and will start any second");
const started = () => console.log("Camera has started");
const stopped = () => console.log("Camera has stopped");
const paused = () => console.log("Video feed has paused");
const resumed = () => console.log("Video feed has resumed");
const cameraChange = (deviceID: string) => console.log(`Camera has been changed to ${deviceID}`);
const snapshot = (blob: Blob) => console.log("A snapshot has been taken");
const error = (error: Error) => console.log("error");
return {
loading,
started,
stopped,
paused,
resumed,
cameraChange,
snapshot,
error
}
}
});
Name | Parameters | Description |
---|---|---|
loading | Emitted when the camera is loading | |
started | Emitted when the camera is loaded and is visible | |
stopped | Emitted when the camera has stopped | |
paused | Emitted when the video has paused | |
resumed | Emitted when the video has resumed | |
camera-change | deviceID: string |
Emitted when a camera change occurs |
snapshot | blob: Blob |
Emitted when a snapshot is taken |
error | error: Error |
Emitted when an error occurs |
Licence
simple-vue-camera is available under the MIT licence. See the LICENCE for more info.