Я делаю SIP-клиент и с ним какие-то проблемы. Я приглашаю пользователя через SIP-сервер, и получаю от него параметры SDP. Однако пользовательский клиент (MicroSip) не отправлял sdprop-params в SDP. Более того, он также не отправлял срезы SPS / PPS в потоке RTP.
Как таким образом получить параметры изображения?
Дамп Wireshark
Session Description Protocol
Session Description Protocol Version (v): 0
Owner/Creator, Session Id (o): - 1516869540 1516869540 IN IP4 172.16.50.175
Session Name (s): mss
Connection Information (c): IN IP4 172.16.50.175
Time Description, active time (t): 0 0
Media Description, name and address (m): audio 4000 RTP/AVP 97 100
Connection Information (c): IN IP4 172.16.50.175
Media Attribute (a): rtcp:4001 IN IP4 172.16.50.175
Media Attribute Fieldname: rtcp
Media Attribute Value: 4001 IN IP4 172.16.50.175
Media Attribute (a): sendrecv
Media Attribute (a): rtpmap:97 opus/48000/2
Media Attribute Fieldname: rtpmap
Media Format: 97
MIME Type: opus
Sample Rate: 48000
Media Attribute (a): fmtp:97 maxplaybackrate=24000
Media Attribute Fieldname: fmtp
Media Format: 97 [opus]
Media format specific parameters: maxplaybackrate=24000
Media Attribute (a): rtpmap:100 telephone-event/8000
Media Attribute Fieldname: rtpmap
Media Format: 100
MIME Type: telephone-event
Sample Rate: 8000
Media Attribute (a): fmtp:100 0-16
Media Attribute Fieldname: fmtp
Media Format: 100 [telephone-event]
Media format specific parameters: 0-16
Media Description, name and address (m): video 4002 RTP/AVP 97
Connection Information (c): IN IP4 172.16.50.175
Media Attribute (a): rtcp:4003 IN IP4 172.16.50.175
Media Attribute Fieldname: rtcp
Media Attribute Value: 4003 IN IP4 172.16.50.175
Media Attribute (a): sendrecv
Media Attribute (a): rtpmap:97 H264/90000
Media Attribute Fieldname: rtpmap
Media Format: 97
MIME Type: H264
Sample Rate: 90000
Media Attribute (a): fmtp:97 profile-level-id=42801e; packetization-mode=0
Media Attribute Fieldname: fmtp
Media Format: 97 [H264]
Media format specific parameters: profile-level-id=42801e
Profile: 42801e
Media format specific parameters: packetization-mode=0
[Packetization mode: Single NAL mode (0)]