代码如下:

function getSenderState(states) {
    states.forEach((state) => {
        if (state.type === 'outbound-rtp' && !state.isRemote) {
            let curTimestamp = state.timestamp;
            let bytes = state.bytesSent;
            let packets = state.packetsSent;
            //不为空且是同一个report
            if (lastReports && lastReports.has(state.id)) {
                //计算平均值
                let lastReprt = lastReports.get(state.id);
                let bitrate = 8 * (bytes - lastReprt.bytesSent) / (curTimestamp - lastReprt.timestamp);

                bitrateSeries.addPoint(curTimestamp, bitrate);
                bitrateGraph.setDataSeries(bitrateSeries);
                bitrateGraph.updateEndDate();

                packetSeries.addPoint(curTimestamp, packets - lastReprt.packetsSent);
                packetGraph.setDataSeries(packetSeries);
                packetGraph.updateEndDate();
            }
        }
    });
    lastReports = states;
}

//定时器 1s 执行一次
window.setInterval(() => {
    if (!peerConnect) {
        return;
    }
    console.log("setInterval run");
    let sender = peerConnect.getSenders()[0];
    if (!sender) {
        console.log("sender is null.");
        return;
    }
    //获取状态
    sender.getStats()
        .then(getSenderState)
        .catch(handleError);
}, 1000);

代码可以正常运行,也可以达到两端通信
获取:
let sender = peerConnect.getSenders()[0];
serder
不为空,进行到下一步:
sender.getStats().then(getSenderState )
在getSenderState方法中
*states 的长度为 0 *