《网站开发实践》 实训报告南京高淳开展规模性核酸检测

最近在做webRtc相关音视频项目，碰到了很多用户不知道自己设备是否被支持发起webRtc，所以特意总结相关实用方法；

HTML

/*id方便一会把媒体流赋值过去, autoPlay: 自动播放 */
<audio id="devDetectionMicroRef" autoPlay></audio>
/*video建议知道宽高, autoPlay: 自动播放 */
<video id="devDetectionVideoRef" autoPlay width="640" height="480"></video>

检测麦克风相关

/* 全局变量 */
const audioSteam = {current: null
}
// 获取音视频轨道流
handleMicrophoneDetection(){navigator.mediaDevices.getUserMedia({audio: true}).then(stream => {audioSteam.current = stream;// 获取当前采集麦克风名称handleStreamGetMicroName();// 处理播放handleAudioPlay();}).catch(error => {let errorMessage = error + '';if (errorMessage.includes('Permission denied')) {errorMessage = '请开启麦克风权限';} else if (errorMessage.includes('Requested device not found')) {errorMessage = '请检测麦克风是否插入';};console.log('error', errorMessage)});
},
// 处理播放
handleAudioPlay(){const stream = audioSteam.current;const elm: HTMLVideoElement | any = document.getElementById('devDetectionMicroRef');if (elm) {elm.srcObject = stream;}
}
// 获取麦克风名
handleStreamGetMicroName(){if (audioSteam.current) {const audioTrack = audioSteam.current.getAudioTracks()[0];console.log(audioTrack.label);}
}
// 停止麦克采集
stopAudioSteam() {if (audioSteam.current) {audioSteam.current.getTracks().forEach((sender: any) => {sender.stop();});}
}

检测摄像头相关

/*全局变量*/
const videoSteam = {current: null
}
// 摄像头检测
handleCameraDetection() {navigator.mediaDevices.getUserMedia({video: true}).then((stream) => {videoSteam.current = stream;// 获取摄像头名称handleStreamGetCameraName();// 播放handleVideoPlay();}).catch((error) => {let errorMessage = error + '';if (errorMessage.includes('Permission denied')) {errorMessage = '请开启摄像头权限';} else if (errorMessage.includes('Requested device not found')) {errorMessage = '请检测摄像头是否插入';};console.log('error', errorMessage);})
}
// 播放
handleVideoPlay() {const stream = videoSteam.current;const elm: HTMLVideoElement | any = document.getElementById('devDetectionVideoRef');if (elm) {elm.srcObject = stream;}
}
// 根据stream获取摄像头名称
handleStreamGetCameraName() {if (videoSteam.current) {const videoTrack = videoSteam.current.getVideoTracks()[0];setGatherCameraName(videoTrack.label);}
}
// 停止摄像头采集
stopVideoSteam() {if (videoSteam.current) {videoSteam.current.getTracks().forEach((sender: any) => {sender.stop();});}
}

获取默认采集设备

handleDefaultDeviceId(type: number) {switch(type) {case 1: // 获取默认音频设备{navigator.mediaDevices.getUserMedia({audio: true}).then((stream) => {const tracks = stream.getTracks();for (let i in tracks) {// 获取音频默认采集设备idlet deviceId = tracks[i].getSettings().deviceId + '';tracks[i].stop();}}).catch((error) => {console.log('error', error);})}break;case 2: // 获取默认视频设备{navigator.mediaDevices.getUserMedia({video: true}).then((stream) => {const tracks = stream.getTracks();for (let i in tracks) {// 获取视频默认采集设备idlet deviceId = tracks[i].getSettings().deviceId + '';tracks[i].stop();}}).catch((error) => {console.log('error', error);})}break;}
},