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我正在尝试H264使用 Janus WebRTC Gateway 在 Web 浏览器中运行编码的实时流。使用 进行测试时Chrome，流工作正常，但firefox显示ICE failed, add a TURN server and see about:webrtc for more details.

以下是我about:webrtc的 Firefox 日志。

[ 6442450983 ] http://192.168.2.194:5000/ 15:18:19 GMT+0530 (IST)
PeerConnection ID: 1515491295667117 (id=6442450983 url=http://192.168.2.194:5000/)
ICE Stats
Local Candidate Remote Candidate    ICE State   Priority    Nominated   Selected    Bytes sent  Bytes received
ICE restarts:
ICE rollbacks:
SDP
Local SDP

v=0

o=mozilla...THIS_IS_SDPARTA-57.0.4 3500649212029345392 0 IN IP4 0.0.0.0

s=-

t=0 0

a=sendrecv

a=fingerprint:sha-256 11:44:F1:BD:D1:69:8E:17:E0:9A:AA:89:8E:76:9F:4E:09:E1:94:D0:37:34:EE:FE:DF:5E:FC:77:B0:4D:F7:53

a=ice-options:trickle

a=msid-semantic:WMS *

m=video 0 RTP/SAVPF 120

c=IN IP4 0.0.0.0

a=inactive

a=end-of-candidates

a=mid:video

a=rtpmap:120 VP8/90000

Remote SDP

v=0

o=- 1515491295396595 1515491295396595 IN IP4 106.51.68.195

s=-

t=0 0

a=sendrecv

a=group:BUNDLE video

a=msid-semantic:WMS janus

m=video 9 RTP/SAVPF 126

c=IN IP4 106.51.68.195

a=candidate:1 1 udp 2013266431 192.168.2.194 45887 typ host

a=candidate:2 1 udp 1677722111 106.51.68.195 45887 typ srflx raddr 192.168.2.194 rport 45887

a=sendonly

a=end-of-candidates

a=fingerprint:sha-256 D2:B9:31:8F:DF:24:D8:0E:ED:D2:EF:25:9E:AF:6F:B8:34:AE:53:9C:E6:F3:8F:F2:64:15:FA:E8:7F:53:2D:38

a=ice-options:trickle

a=ice-pwd:KsS99rsAZXj9lFd7psCT61

a=ice-ufrag:3tcw

a=mid:video

a=rtcp-fb:126 nack

a=rtcp-fb:126 goog-remb

a=rtcp-mux

a=rtpmap:126 H264/90000

a=setup:actpass

a=ssrc:3973486276 cname:janusvideo

a=ssrc:3973486276 msid:janus janusv0

a=ssrc:3973486276 mslabel:janus

a=ssrc:3973486276 label:janusv0

RTP Stats

我什至尝试添加以下 TURN 服务器

{urls: "turn:numb.viagenie.ca",
 username: "l1787875@mvrht.com",
 credential: "test"}

但是控制台错误变为ICE failed, your TURN server appears to be broken, see about:webrtc for more details，保持about:webrtc日志与以前相同。

我发现 Firefox 无法为 Janus 生成的 SDP 报价生成有效答案。Firefox 创建的答案具有属性rtpmap: 120 VP8/90000，而 Janus 提供的 SDP 提供具有属性rtpmap: 127 H264/90000，这会阻止 Firefox 与 Janus 建立 SDP 会话。Chrome 可以生成有效的答案，rtpmap: 127 H264/90000因此它可以完美地显示流。

我正在使用Mozilla firefox-57.0.4. 有没有办法，我可以获取/生成从 JanusSDP answer传入的有效值？SDP offer

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1 回答 1

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这个解决方案对我有用（最后一条黄色消息）： https ://groups.google.com/forum/#!topic/meetecho-janus/jKg5u9421kM

我正在使用 Janus，我在 Firefox 中遇到了同样的错误。问题是关于 SDP profile-level-id。我只需要更换它：

            // Create offer/answer now
             if(jsep === null || jsep === undefined) {
                     createOffer(handleId, media, callbacks);
             } else {
                     if(adapter.browserDetails.browser === "edge") {
                             // This is Edge, add an a=end-of-candidates at the end
                             jsep.sdp += "a=end-of-candidates\r\n";
                     }
                     var oldsdp = jsep["sdp"];
                     var pattern=/420029/gi;
                     var newsdp = oldsdp.replace(pattern,"42e01f");
                     Janus.log(newsdp);
                     jsep["sdp"]=newsdp;
                     config.pc.setRemoteDescription(
                                     new RTCSessionDescription(jsep),
                                     function() {
                                             Janus.log("Remote description accepted!");
                                             createAnswer(handleId, media, callbacks);
                                     }, callbacks.error);
             }
     }
于 2018-03-10T03:03:32.753 回答