相关疑难解决方法(0)

作为学习 WebRTC 的练习，我试图展示本地网络摄像头并并排显示网络摄像头的延迟播放。为了实现这一点，我试图将记录的 blob 传递给 BufferSource 并使用相应的 MediaSource 作为视频元素的源。

// the ondataavailable callback for the MediaRecorder
async function handleDataAvailable(event) {
  // console.log("handleDataAvailable", event);
  if (event.data && event.data.size > 0) {
    recordedBlobs.push(event.data);
  }

  if (recordedBlobs.length > 5) {
    if (recordedBlobs.length === 5)
      console.log("buffered enough for delayed playback");
    if (!updatingBuffer) {
      updatingBuffer = true;
      const bufferedBlob = recordedBlobs.shift();
      const bufferedAsArrayBuffer = await bufferedBlob.arrayBuffer();
      if (!sourceBuffer.updating) {
        console.log("appending to buffer");
        sourceBuffer.appendBuffer(bufferedAsArrayBuffer);
      } else {
        console.warn("Buffer still updating... ");
        recordedBlobs.unshift(bufferedBlob);
      }
    }
  }
} …

我有这个简单的代码来获取视频流的块并在MediaSource中播放它们.我看到视频,但有时会停止.它可能会工作几秒钟或几分钟.但最后它在某个时刻停止了.chrome:// media-internals /显示没有错误.

这有什么不对？

    navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
var mediaSource = new MediaSource();
var constraints = {
    "audio": true,
    "video": {
        "mandatory": {
            "minWidth": 320, "maxWidth": 320,
            "minHeight": 240, "maxHeight": 240
        }, "optional": []
    }
};
window.mediaSource = mediaSource;
var sourceBuffer;
var video = document.querySelector('#video');
window.video = video;
video.src = window.URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen', function (e) {
    console.log("sourceopen");
    sourceBuffer = mediaSource.addSourceBuffer('video/webm; codecs="vorbis,vp8"');
    window.sourceBuffer = sourceBuffer;
}, false);
mediaSource.addEventListener('error', function (e) {
    console.log("error", e)
}, false);
var stack …