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feat: add WebRTC (MediaMTX / rtsp-simple-server) webcam mode (#1318)
Co-authored-by: Stefan Dej <meteyou@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,237 @@ | ||
| <template> | ||
| <div> | ||
| <video | ||
| v-show="status === 'connected'" | ||
| ref="video" | ||
| :style="webcamStyle" | ||
| class="webcamImage" | ||
| autoplay | ||
| playsinline | ||
| muted /> | ||
| <v-row v-if="status !== 'connected'"> | ||
| <v-col class="_webcam_webrtc_output text-center d-flex flex-column justify-center align-center"> | ||
| <v-progress-circular v-if="status === 'connecting'" indeterminate color="primary" class="mb-3" /> | ||
| <span class="mt-3">{{ status }}</span> | ||
| </v-col> | ||
| </v-row> | ||
| </div> | ||
| </template> | ||
|
|
||
| <script lang="ts"> | ||
| import { Component, Mixins, Prop, Ref, Watch } from 'vue-property-decorator' | ||
| import BaseMixin from '@/components/mixins/base' | ||
| @Component | ||
| export default class WebrtcRTSPSimpleServer extends Mixins(BaseMixin) { | ||
| @Prop({ required: true }) camSettings: any | ||
| @Ref() | ||
| declare video: HTMLVideoElement | ||
| // webrtc player vars | ||
| private terminated: boolean = false | ||
| private ws: WebSocket | null = null | ||
| private pc: RTCPeerConnection | null = null | ||
| private restartTimeoutTimer: any = null | ||
| private status: string = 'connecting' | ||
| // stop the video and close the streams if the component is going to be destroyed so we don't leave hanging streams | ||
| beforeDestroy() { | ||
| this.terminate() | ||
| // clear any potentially open restart timeout | ||
| if (this.restartTimeoutTimer) { | ||
| clearTimeout(this.restartTimeoutTimer) | ||
| } | ||
| } | ||
| get webcamStyle() { | ||
| let transforms = '' | ||
| if ('flipX' in this.camSettings && this.camSettings.flipX) transforms += ' scaleX(-1)' | ||
| if ('flipX' in this.camSettings && this.camSettings.flipY) transforms += ' scaleY(-1)' | ||
| if (transforms.trimStart().length) return { transform: transforms.trimStart() } | ||
| return '' | ||
| } | ||
| get url() { | ||
| if (this.camSettings.urlStream.startsWith('http')) { | ||
| return this.camSettings.urlStream.replace('http', 'ws') + 'ws' | ||
| } | ||
| return this.camSettings.urlStream | ||
| } | ||
| // stop and restart the video if the url changes | ||
| @Watch('url') | ||
| changedUrl() { | ||
| this.terminate() | ||
| this.start() | ||
| } | ||
| get expanded(): boolean { | ||
| return this.$store.getters['gui/getPanelExpand']('webcam-panel', this.viewport) ?? false | ||
| } | ||
| // start or stop the video when the expand state changes | ||
| @Watch('expanded', { immediate: true }) | ||
| expandChanged(newExpanded: boolean): void { | ||
| if (!newExpanded) { | ||
| this.terminate() | ||
| return | ||
| } | ||
| this.start() | ||
| } | ||
| // webrtc player methods | ||
| // adapated from sample player in https://github.com/mrlt8/docker-wyze-bridge | ||
| start() { | ||
| // unterminate we're starting again. | ||
| this.terminated = false | ||
| // clear any potentially open restart timeout | ||
| if (this.restartTimeoutTimer) { | ||
| clearTimeout(this.restartTimeoutTimer) | ||
| this.restartTimeoutTimer = null | ||
| } | ||
| window.console.log('[webcam-rtspsimpleserver] web socket connecting') | ||
| // test if the url is valid | ||
| try { | ||
| const url = new URL(this.url) | ||
| // break if url protocol is not ws | ||
| if (!url.protocol.startsWith('ws')) { | ||
| console.log('[webcam-rtspsimpleserver] invalid URL (no ws protocol)') | ||
| return | ||
| } | ||
| } catch (err) { | ||
| console.log('[webcam-rtspsimpleserver] invalid URL') | ||
| return | ||
| } | ||
| // open websocket connection | ||
| this.ws = new WebSocket(this.url) | ||
| this.ws.onerror = (event) => { | ||
| window.console.log('[webcam-rtspsimpleserver] websocket error', event) | ||
| this.ws?.close() | ||
| this.ws = null | ||
| } | ||
| this.ws.onclose = (event) => { | ||
| console.log('[webcam-rtspsimpleserver] websocket closed', event) | ||
| this.ws = null | ||
| this.scheduleRestart() | ||
| } | ||
| this.ws.onmessage = (msg: MessageEvent) => this.webRtcOnIceServers(msg) | ||
| } | ||
| terminate() { | ||
| this.terminated = true | ||
| try { | ||
| this.video.pause() | ||
| } catch (err) { | ||
| // ignore -- make sure we close down the sockets anyway | ||
| } | ||
| this.ws?.close() | ||
| this.pc?.close() | ||
| } | ||
| webRtcOnIceServers(msg: MessageEvent) { | ||
| if (this.ws === null) return | ||
| const iceServers = JSON.parse(msg.data) | ||
| this.pc = new RTCPeerConnection({ | ||
| iceServers, | ||
| }) | ||
| this.ws.onmessage = (msg: MessageEvent) => this.webRtcOnRemoteDescription(msg) | ||
| this.pc.onicecandidate = (evt: RTCPeerConnectionIceEvent) => this.webRtcOnIceCandidate(evt) | ||
| this.pc.oniceconnectionstatechange = () => { | ||
| if (this.pc === null) return | ||
| window.console.log('[webcam-rtspsimpleserver] peer connection state:', this.pc.iceConnectionState) | ||
| this.status = (this.pc?.iceConnectionState ?? '').toString() | ||
| if (['failed', 'disconnected'].includes(this.status)) { | ||
| this.scheduleRestart() | ||
| } | ||
| } | ||
| this.pc.ontrack = (evt: RTCTrackEvent) => { | ||
| window.console.log('[webcam-rtspsimpleserver] new track ' + evt.track.kind) | ||
| this.video.srcObject = evt.streams[0] | ||
| } | ||
| const direction = 'sendrecv' | ||
| this.pc.addTransceiver('video', { direction }) | ||
| this.pc.addTransceiver('audio', { direction }) | ||
| this.pc.createOffer().then((desc: any) => { | ||
| if (this.pc === null || this.ws === null) return | ||
| this.pc.setLocalDescription(desc) | ||
| window.console.log('[webcam-rtspsimpleserver] sending offer') | ||
| this.ws.send(JSON.stringify(desc)) | ||
| }) | ||
| } | ||
| webRtcOnRemoteDescription(msg: any) { | ||
| if (this.pc === null || this.ws === null) return | ||
| this.pc.setRemoteDescription(new RTCSessionDescription(JSON.parse(msg.data))) | ||
| this.ws.onmessage = (msg: any) => this.webRtcOnRemoteCandidate(msg) | ||
| } | ||
| webRtcOnIceCandidate(evt: RTCPeerConnectionIceEvent) { | ||
| if (this.ws === null) return | ||
| if (evt.candidate?.candidate !== '') { | ||
| this.ws.send(JSON.stringify(evt.candidate)) | ||
| } | ||
| } | ||
| webRtcOnRemoteCandidate(msg: any) { | ||
| if (this.pc === null) return | ||
| this.pc.addIceCandidate(JSON.parse(msg.data)) | ||
| } | ||
| scheduleRestart() { | ||
| this.ws?.close() | ||
| this.ws = null | ||
| this.pc?.close() | ||
| this.pc = null | ||
| if (this.terminated) return | ||
| this.restartTimeoutTimer = setTimeout(() => { | ||
| this.start() | ||
| }, 2000) | ||
| } | ||
| } | ||
| </script> | ||
|
|
||
| <style scoped> | ||
| .webcamImage { | ||
| width: 100%; | ||
| } | ||
| ._webcam_webrtc_output { | ||
| aspect-ratio: calc(3 / 2); | ||
| } | ||
| video { | ||
| width: 100%; | ||
| } | ||
| </style> |
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