javascript网络摄像头未在生产环境中打开，但可在本地主机中工作

javascript代码：

          var pc = null;

          // data channel
          var dc = null, dcInterval = null;

          function createPeerConnection() {
              var config = {
                  sdpSemantics: 'unified-plan'
              };

              pc = new RTCPeerConnection(config);

              // connect video
              pc.addEventListener('track', function(evt) {
                  if (evt.track.kind == 'video')
                      console.log(evt.streams[0], "@@")
                      console.log(document.getElementById('video').srcObject, "==")
                      document.getElementById('video').srcObject = evt.streams[0];
              });

              return pc;
          }

          function negotiate() {
              return pc.createOffer().then(function(offer) {
                  return pc.setLocalDescription(offer);
              }).then(function() {
                  // wait for ICE gathering to complete
                  return new Promise(function(resolve) {
                      if (pc.iceGatheringState === 'complete') {
                          resolve();
                      } else {
                          function checkState() {
                              if (pc.iceGatheringState === 'complete') {
                                  pc.removeEventListener('icegatheringstatechange', checkState);
                                  resolve();
                              }
                          }
                          pc.addEventListener('icegatheringstatechange', checkState);
                      }
                  });
              }).then(function() {
                  var offer = pc.localDescription;

                  return fetch('/offer', {
                      body: JSON.stringify({
                          sdp: offer.sdp,
                          type: offer.type,
                          // video_transform: document.getElementById('video-transform').value
                          video_transform: "makeup_v2"
                      }),
                      headers: {
                          'Content-Type': 'application/json'
                      },
                      method: 'POST'
                  });
              }).then(function(response) {
                  return response.json();
              }).then(function(answer) {
                  return pc.setRemoteDescription(answer);
              }).catch(function(e) {
                  alert(e);
              });
          }

          function start() {
              document.getElementById('start').style.display = 'none';

              pc = createPeerConnection();

              var time_start = null;

              function current_stamp() {
                  if (time_start === null) {
                      time_start = new Date().getTime();
                      return 0;
                  } else {
                      return new Date().getTime() - time_start;
                  }
              }


              var constraints = {
                  video: false
              };

              // if (document.getElementById('use-video').checked) {
                  // var resolution = document.getElementById('video-resolution').value;
                  var resolution = "320x240"
                  if (resolution) {
                      resolution = resolution.split('x');
                      constraints.video = {
                          width: parseInt(resolution[0], 0),
                          height: parseInt(resolution[1], 0)
                      };
                  } else {
                      constraints.video = true;
                  }
              // }

              if (constraints.video) {
                  if (constraints.video) {
                      document.getElementById('media').style.display = 'block';
                  }
                  navigator.mediaDevices.getUserMedia(constraints).then(function(stream) {
                      stream.getTracks().forEach(function(track) {
                          pc.addTrack(track, stream);
                      });
                      return negotiate();
                  }, function(err) {
                      alert('Could not acquire media: ' + err);
                  });
              } else {
                  negotiate();
              }

              document.getElementById('stop').style.display = 'inline-block';
          }

          function stop() {
              document.getElementById('stop').style.display = 'none';

              // close data channel
              if (dc) {
                  dc.close();
              }

              // close transceivers
              if (pc.getTransceivers) {
                  pc.getTransceivers().forEach(function(transceiver) {
                      if (transceiver.stop) {
                          transceiver.stop();
                      }
                  });
              }

              // close local video
              pc.getSenders().forEach(function(sender) {
                  sender.track.stop();
              });

              // close peer connection
              setTimeout(function() {
                  pc.close();
              }, 500);
          }

Html代码：

          <html>
          <head>
              <meta charset="UTF-8"/>
              <meta name="viewport" content="width=device-width, initial-scale=1.0" />
          </head>
          <body>
          <button id="start" onclick="start()">Start</button>
          <button id="stop" style="display: none" onclick="stop()">Stop</button>
          <div id="media" style="display: none">
          <div style="border:2px solid red;">
              <audio id="audio" autoplay="true"></audio>
              <video id="video" autoplay="true" playsinline="true"></video>
          </div>
          </div>
          <script src="client.js"></script>
          </body>
          </html>

开始
停止

这是我的产品url

响应也即将成功，并且控制台中没有日志

原因是什么。
笔记本电脑中的网络摄像头指示灯亮起，但网络摄像头不工作

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