{ “ sdp”：“ v = 0 \ r \ no =-6270858809443509919 2 IN IP4 127.0.0.1 \ r \ ns =-\ r \ nt = 0 0 \ r \ na = group：BUNDLE video \ r \ na = msid-语义：WMS stream_label \ r \ nm = video 9 UDP / TLS / RTP / SAVPF 100 \ r \ nc = IN IP4 0.0.0.0 \ r \ na = rtcp：9 IN IP4 0.0.0.0 \ r \ na = ice-ufrag ：4 / Nt \ r \ na = ice-pwd：iaUavQ6VMWhDBdfXy2dVdJ1N \ r \ na = ice-options：trickle \ r \ na = fingerprint：sha-256 19：7D：1B：93：5C：73：F5：AF： 16：4F：C2：76：A6：FC：EA：CE：3B：88：E2：9F：15：3C：0B：6D：99：43：60：3F：64：21：B4：CC \ r \ na = setup：active \ r \ na = mid：video \ r \ na = extmap：2 urn：ietf：params：rtp-hdrext：toffset \ r \ na = extmap：3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time \ r \ na = extmap：4 urn：3gpp：视频方向\ r \ na = extmap：5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01 \ r \ na = extmap：6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay \ r \ na = sendonly \ r \ na = rtcp-mux \ r \ na = rtcp-rsize \ r \ na = rtpmap：100 H264 / 90000 \ r \ na = rtcp-fb：100 ccm fir \ r \ na = rtcp-fb：100 nack \ r \ na = rtcp-fb ：100 nack pli \ r \ na = rtcp-fb：100 goog-remb \ r \ na = rtcp-fb：100 transport-cc \ r \ na = fmtp：100允许水平不对称= 1;打包模式= 1; profile-level-id = 42001f \ r \ na = ssrc：2993135158 cname：zcxaF4RAbhhEtlvl \ r \ na = ssrc：2993135158 msid：stream_label video_label \ r \ na = ssrc：29931 35158 mslabel：stream_label \ r \ na = ssrc：2993135158标签：video_label \ r \ n“， “类型”：“答案” } |-|-| { “ candidate”：“候选：3323487487 1 udp 2122260223 172.31.28.183 8080 typ host generation 0 ufrag 4 / Nt network-id 1 network-cost 50”， “ sdpMLineIndex”：0， “ sdpMid”：“视频”， “ type”：“候选人” }