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<script setup lang="ts">
import _ from 'lodash';
import { useMediaRecorder } from './useMediaRecorder';
interface Media { type: 'image' | 'video'; value: string; createdAt: Date }
const {
videoInputs: cameras,
audioInputs: microphones,
permissionGranted,
isSupported,
ensurePermissions,
} = useDevicesList({
requestPermissions: true,
constraints: { video: true, audio: true },
onUpdated() {
refreshCurrentDevices();
},
});
const video = ref<HTMLVideoElement>();
const medias = ref<Media[]>([]);
const currentCamera = ref(cameras.value[0]?.deviceId);
const currentMicrophone = ref(microphones.value[0]?.deviceId);
const permissionCannotBePrompted = ref(false);
const {
stream,
start,
enabled: isMediaStreamAvailable,
} = useUserMedia({
constraints: computed(() => ({
video: { deviceId: currentCamera.value },
...(currentMicrophone.value ? { audio: { deviceId: currentMicrophone.value } } : {}),
})),
autoSwitch: true,
});
const {
isRecordingSupported,
onRecordAvailable,
startRecording,
stopRecording,
pauseRecording,
recordingState,
resumeRecording,
} = useMediaRecorder({
stream,
});
onRecordAvailable((value) => {
medias.value.unshift({ type: 'video', value, createdAt: new Date() });
});
function refreshCurrentDevices() {
if (_.isNil(currentCamera) || !cameras.value.find(i => i.deviceId === currentCamera.value)) {
currentCamera.value = cameras.value[0]?.deviceId;
}
if (_.isNil(microphones) || !microphones.value.find(i => i.deviceId === currentMicrophone.value)) {
currentMicrophone.value = microphones.value[0]?.deviceId;
}
}
function takeScreenshot() {
if (!video.value) {
return;
}
const canvas = document.createElement('canvas');
canvas.width = video.value.videoWidth;
canvas.height = video.value.videoHeight;
canvas.getContext('2d')?.drawImage(video.value, 0, 0);
const image = canvas.toDataURL('image/png');
medias.value.unshift({ type: 'image', value: image, createdAt: new Date() });
}
watchEffect(() => {
if (video.value && stream.value) {
video.value.srcObject = stream.value;
}
});
async function requestPermissions() {
try {
await ensurePermissions();
}
catch (e) {
permissionCannotBePrompted.value = true;
}
}
function downloadMedia({ type, value, createdAt }: Media) {
const link = document.createElement('a');
link.href = value;
link.download = `${type}-${createdAt.getTime()}.${type === 'image' ? 'png' : 'webm'}`;
link.click();
}
</script>
<template>
<div>
<c-card v-if="!isSupported">
Your browser does not support recording video from camera
</c-card>
<c-card v-else-if="!permissionGranted" text-center>
You need to grant permission to use your camera and microphone
<c-alert v-if="permissionCannotBePrompted" mt-4 text-left>
Your browser has blocked permission request or does not support it. You need to grant permission manually in
your browser settings (usually the lock icon in the address bar).
</c-alert>
<div v-else mt-4 flex justify-center>
<c-button @click="requestPermissions">
Grant permission
</c-button>
</div>
</c-card>
<c-card v-else>
<div flex flex-col gap-2>
<c-select
v-model:value="currentCamera"
label-position="left"
label-width="60px"
label="Video:"
:options="cameras.map(({ deviceId, label }) => ({ value: deviceId, label }))"
placeholder="Select camera"
/>
<c-select
v-if="currentMicrophone && microphones.length > 0"
v-model:value="currentMicrophone"
label="Audio:"
label-position="left"
label-width="60px"
:options="microphones.map(({ deviceId, label }) => ({ value: deviceId, label }))"
placeholder="Select microphone"
/>
</div>
<div v-if="!isMediaStreamAvailable" mt-3 flex justify-center>
<c-button type="primary" @click="start">
Start webcam
</c-button>
</div>
<div v-else>
<div my-2>
<video ref="video" autoplay controls playsinline max-h-full w-full />
</div>
<div flex items-center justify-between gap-2>
<c-button :disabled="!isMediaStreamAvailable" @click="takeScreenshot">
<span mr-2> <icon-mdi-camera /></span>
Take screenshot
</c-button>
<div v-if="isRecordingSupported" flex justify-center gap-2>
<c-button v-if="recordingState === 'stopped'" @click="startRecording">
<span mr-2> <icon-mdi-video /></span>
Start recording
</c-button>
<c-button v-if="recordingState === 'recording'" @click="pauseRecording">
<span mr-2> <icon-mdi-pause /></span>
Pause
</c-button>
<c-button v-if="recordingState === 'paused'" @click="resumeRecording">
<span mr-2> <icon-mdi-play /></span>
Resume
</c-button>
<c-button v-if="recordingState !== 'stopped'" type="error" @click="stopRecording">
<span mr-2> <icon-mdi-record /></span>
Stop
</c-button>
</div>
<div v-else italic op-60>
Video recording is not supported in your browser
</div>
</div>
</div>
</c-card>
<div grid grid-cols-2 mt-5 gap-2>
<c-card v-for="({ type, value, createdAt }, index) in medias" :key="index">
<img v-if="type === 'image'" :src="value" max-h-full w-full alt="screenshot">
<video v-else :src="value" controls max-h-full w-full />
<div flex items-center justify-between>
<div font-bold>
{{ type === 'image' ? 'Screenshot' : 'Video' }}
</div>
<div flex gap-2>
<c-button @click="downloadMedia({ type, value, createdAt })">
<icon-mdi-download />
</c-button>
<c-button @click="medias = medias.filter((_ignored, i) => i !== index)">
<icon-mdi-delete-outline />
</c-button>
</div>
</div>
</c-card>
</div>
</div>
</template>
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