janus webrtc 中显示本地上传的速度

janus在默认的api 没提供本地上传的速度 可以通过webrtc的getstatus()来获取参考

https://webrtc.github.io/samples/src/content/peerconnection/audio/

重点参考main.js

window.setInterval(() => {
  if (!pc1) {
    return;
  }
  const sender = pc1.getSenders()[0];
  if (!sender) {
    return;
  }
  sender.getStats().then(res => {
    res.forEach(report => {
      let bytes;
      let headerBytes;
      let packets;
      if (report.type === 'outbound-rtp') {
        if (report.isRemote) {
          return;
        }
        const now = report.timestamp;
        bytes = report.bytesSent;
        headerBytes = report.headerBytesSent;

        packets = report.packetsSent;
        if (lastResult && lastResult.has(report.id)) {
          const deltaT = (now - lastResult.get(report.id).timestamp) / 1000;
          // calculate bitrate
          const bitrate = 8 * (bytes - lastResult.get(report.id).bytesSent) /
            deltaT;
          const headerrate = 8 * (headerBytes - lastResult.get(report.id).headerBytesSent) /
            deltaT;

          // append to chart
          bitrateSeries.addPoint(now, bitrate);
          headerrateSeries.addPoint(now, headerrate);
          targetBitrateSeries.addPoint(now, report.targetBitrate);
          bitrateGraph.setDataSeries([bitrateSeries, headerrateSeries, targetBitrateSeries]);
          bitrateGraph.updateEndDate();

          // calculate number of packets and append to chart
          packetSeries.addPoint(now, (packets -
            lastResult.get(report.id).packetsSent) / deltaT);
          packetGraph.setDataSeries([packetSeries]);
          packetGraph.updateEndDate();
        }
      }
    });
    lastResult = res;
  });
}, 1000);
将上面的pc 换成janus的pc就行了
每次和上次做对比 bitrate /1024 kb就是上传速度了