如何在getUserMedia()的多个后置摄像头中选择最高分辨率

// 获取所有媒体设备
navigator.mediaDevices.enumerateDevices()
  .then(function(devices) {
    // 找到所有后置摄像头
    const videoDevices = devices.filter(device => device.kind === 'videoinput' && device.facingMode === 'environment');
    
    // 初始化最高分辨率和对应的设备
    let highestResolution = 0;
    let selectedDevice;
    
    // 遍历后置摄像头，选择最高分辨率的设备
    videoDevices.forEach(function(device) {
      navigator.mediaDevices.getUserMedia({
        video: {
          deviceId: device.deviceId,
          width: { ideal: 4096 },
          height: { ideal: 2160 }
        }
      })
      .then(function(stream) {
        const track = stream.getVideoTracks()[0];
        const settings = track.getSettings();
        
        // 检查当前设备的分辨率是否比最高分辨率更高
        if (settings.width * settings.height > highestResolution) {
          highestResolution = settings.width * settings.height;
          selectedDevice = device;
        }
        
        // 关闭媒体流
        stream.getTracks().forEach(track => track.stop());
        
        // 在控制台打印最高分辨率设备的信息
        console.log('Selected Device:', selectedDevice);
      })
      .catch(function(error) {
        console.error('Error accessing media devices:', error);
      });
    });
  })
  .catch(function(error) {
    console.error('Error enumerating media devices:', error);
  });