Failed to set remote video description send parameters on native IOS

Question

Here is sdpOffer:

offer

v=0

o=- 1514366952141741 1 IN IP4 hostx

s=Mountpoint 99

t=0 0

a=group:BUNDLE video

Answer 1

The problem comes from this line:

profile-level-id 420029

My solution is simply to replace the "420029" by "42e01f", then everything works just fine. The situation seems related to the RFC 6184 8.2.2. You can visit here for more details.

Answer 2

I analyzed your SDP and I found that which is not correct . So you need to do compare bellow SDP , Even though if you get the problem then you can put bellow SDP format as hardcoded for debugging.

char const *local_OR_Remote_sdp =
    "v=0\r\n\
    o=- 4340022199490876901 2 IN IP4 127.0.0.1\r\n\
    s=-\r\n\
    t=0 0\r\n\
    a=group:BUNDLE audio video\r\n\
    a=msid-semantic: WMS ARDAMS\r\n\
    m=audio 9 UDP/TLS/RTP/SAVPF 111 103 9 102 0 8 106 105 13 127 126\r\n\
    c=IN IP4 0.0.0.0\r\n\
    a=rtcp:9 IN IP4 0.0.0.0\r\n\
    a=ice-ufrag:Gok2zrJABO7lhGB8\r\n\
    a=ice-pwd:J1UXkVsMivK9+rqzPuP//OVe\r\n\
    a=fingerprint:sha-256 1F:68:4B:D3:85:4E:11:4C:9B:F7:5A:B9:4C:74:0A:BD:D4:FC:8F:E6:53:68:81:20:D1:03:C9:A9:AD:86:5D:A2\r\n\
    a=setup:actpass\r\n\
    a=mid:audio\r\n\
    a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\n\
    a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\n\
    a=sendrecv\r\n\
    a=rtcp-mux\r\n\
    a=rtpmap:111 opus/48000/2\r\n\
    a=fmtp:111 minptime=10; useinbandfec=1\r\n\
    a=rtpmap:103 ISAC/16000\r\n\
    a=rtpmap:9 G722/8000\r\n\
    a=rtpmap:102 ILBC/8000\r\n\
    a=rtpmap:0 PCMU/8000\r\n\
    a=rtpmap:8 PCMA/8000\r\n\
    a=rtpmap:106 CN/32000\r\n\
    a=rtpmap:105 CN/16000\r\n\
    a=rtpmap:13 CN/8000\r\n\
    a=rtpmap:127 red/8000\r\n\
    a=rtpmap:126 telephone-event/8000\r\n\
    a=maxptime:60\r\n\
    a=ssrc:2271307011 cname:Pjjr5hQnoeV7A6WS\r\n\
    a=ssrc:2271307011 msid:ARDAMS ARDAMSa0\r\n\
    a=ssrc:2271307011 mslabel:ARDAMS\r\n\
    a=ssrc:2271307011 label:ARDAMSa0\r\n\
    m=video 9 UDP/TLS/RTP/SAVPF 100 101 116 117 96\r\n\
    c=IN IP4 0.0.0.0\r\n\
    a=rtcp:9 IN IP4 0.0.0.0\r\n\
    a=ice-ufrag:Gok2zrJABO7lhGB8\r\n\
    a=ice-pwd:J1UXkVsMivK9+rqzPuP//OVe\r\n\
    a=fingerprint:sha-256 1F:68:4B:D3:85:4E:11:4C:9B:F7:5A:B9:4C:74:0A:BD:D4:FC:8F:E6:53:68:81:20:D1:03:C9:A9:AD:86:5D:A2\r\n\
    a=setup:actpass\r\n\
    a=mid:video\r\n\
    a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\r\n\
    a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\n\
    a=extmap:4 urn:3gpp:video-orientation\r\n\
    a=sendrecv\r\n\
    a=rtcp-mux\r\n\
    a=rtpmap:100 VP8/90000\r\n\
    a=rtcp-fb:100 ccm fir\r\n\
    a=rtcp-fb:100 nack\r\n\
    a=rtcp-fb:100 nack pli\r\n\
    a=rtcp-fb:100 goog-remb\r\n\
    a=rtcp-fb:100 transport-cc\r\n\
    a=rtpmap:101 VP9/90000\r\n\
    a=rtcp-fb:101 ccm fir\r\n\
    a=rtcp-fb:101 nack\r\n\
    a=rtcp-fb:101 nack pli\r\n\
    a=rtcp-fb:101 goog-remb\r\n\
    a=rtcp-fb:101 transport-cc\r\n\
    a=rtpmap:116 red/90000\r\n\
    a=rtpmap:117 ulpfec/90000\r\n\
    a=rtpmap:96 rtx/90000\r\n\
    a=fmtp:96 apt=100\r\n\
    a=ssrc-group:FID 4091763228 2995868033\r\n\
    a=ssrc:4091763228 cname:Pjjr5hQnoeV7A6WS\r\n\
    a=ssrc:4091763228 msid:ARDAMS ARDAMSv0\r\n\
    a=ssrc:4091763228 mslabel:ARDAMS\r\n\
    a=ssrc:4091763228 label:ARDAMSv0\r\n\
    a=ssrc:2995868033 cname:Pjjr5hQnoeV7A6WS\r\n\
    a=ssrc:2995868033 msid:ARDAMS ARDAMSv0\r\n\
    a=ssrc:2995868033 mslabel:ARDAMS\r\n\
    a=ssrc:2995868033 label:ARDAMSv0\r\n\
    ";