我已经在peer1(开始连接)和peer2之间实现了webRtc连接。
Peer1 - 是 Firefox v.112。
如果peer2 = Firefox 也没有问题。
如果peer2 = Ms Edge v.118 或 Chrome v.117,那么我观察到两种情况:
如果我没有在行 (*) 中设置断点 - 请参阅下面的代码,则 Peer2 会获取事件:
unmute
(音频),unmute
(视频)——没关系,mute
(视频)!!!并且视频和音频无法播放(显示播放器)。mute
事件的原因是什么!如果我在 (*) 行设置断点,则peer2会获取上述事件,除了
mute
(!),并且浏览器正常播放音频和视频。问题:案例1的
mute
事件的原因是什么?代码是:
navigator.mediaDevices.getUserMedia(constraints).then(
function Resolve_GetUserMedia(stream) {
// add track to peerConnection to send it to peer
let streamToAdd = mediaControl.stream;
let tracksArray = streamToAdd.getTracks();
let msgText = "(1) Adding tracks of the stream _" + streamToAdd.id + "_ " +
"Activity = " + streamToAdd.active + " Total = " + tracksArray.length;
appendMessageText(msgText, "msg_log");
for (let i = 0; i < tracksArray.length; i++) {
let track = tracksArray[i];
// try to add track
let ok_add_1track = false;
try {
// "par_webRtc.peerConnection" is a peerConnection
par_webRtc.peerConnection.addTrack(track, streamToAdd);
ok_add_1track = true;
}
catch(err) {
if (err.code === DOMException.INVALID_ACCESS_ERR) {
// track already sent - no error
ok_add_1track = true; // (*) BREAKPOINT HERE SOLVES THE PROBLEM
}
else {
// other code are "true" errors
errorsCount++;
}
}
if (ok_add_1track) {
// track added successfully
console.log("OK_Status of adding <" + track.kind + "> = " + "OK");
}
else {
console.warn("ERR_Status of adding <" + track.kind + "> = " + "ERROR");
}
if (track.kind === "audio") {
// remember status of track adding
connection.noAudio = !ok_add_1track;
}
else if (track.kind === "video") {
// remember status of track adding
connection.noVideo = !ok_add_1track;
}
let sig_state = (par_webRtc.peerConnection === undefined) ?
"NO PEER CONN!!!" :
par_webRtc.peerConnection.signalingState;
let msgText = "Resolve_RemoteDescriptionSet !!!>> " +
"We sent track to remote.peerConnection : kind=" + track.kind +
" label=" + track.label +
" muted=" + track.muted.toString() +
" id=" + track.id +
" State = " + sig_state;
console.log("WebRTC - " + msgText);
appendMessageText(msgText, "msg_log");
}
} // function Resolve_GetUserMedia(stream)
由于 Microsoft Edge 和 Google Chrome 均使用基于 Chromium 项目的渲染引擎,因此会导致 FF->Edge 或 Chrome 连接产生“静默”事件。您可以在此处发送反馈:https://bugs.chromium.org/p/chromium/issues/list。
有关“静音”事件的更多信息,您可以参考:https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamTrack/mute_event。