RTCP-MUX must be enabled issue

[kibar...@gmail.com]

Hi everyone,

I'm developing Android app based on webRTC and recently faced a following issue. 

When I try to set remoteSdp from Offerer I get this error: "Failed to set remote offer sdp: RTCP-MUX must be enabled when BUNDLE is enabled."

Here's sdp I try to set

v=0

o=- 329226775759156436 2 IN IP4 127.0.0.1

s=-

t=0 0

a=group:BUNDLE audio data

a=msid-semantic: WMS

m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 102 0 8 106 105 13 110 112 113 126

c=IN IP4 0.0.0.0

b=AS:20

a=rtcp:9 IN IP4 0.0.0.0

a=ice-ufrag:

a=ice-pwd:

a=ice-options:trickle renomination

a=fingerprint:sha-256 

a=setup:actpass

a=mid:audio

a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level

a=recvonly

a=rtcp-mux

a=rtpmap:111 opus/48000/2

a=rtcp-fb:111 transport-cc

a=fmtp:111 minptime=10;useinbandfec=1

a=rtpmap:103 ISAC/16000

a=rtpmap:104 ISAC/32000

a=rtpmap:9 G722/8000

a=rtpmap:102 ILBC/8000

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:106 CN/32000

a=rtpmap:105 CN/16000

a=rtpmap:13 CN/8000

a=rtpmap:110 telephone-event/48000

a=rtpmap:112 telephone-event/32000

a=rtpmap:113 telephone-event/16000

a=rtpmap:126 telephone-event/8000

m=application 9 DTLS/SCTP 5000

c=IN IP4 0.0.0.0

b=AS:20

a=ice-ufrag:

a=ice-pwd:

a=ice-options:trickle renomination

a=fingerprint:sha-256

a=setup:actpass

a=mid:data

a=sctpmap:5000 webrtc-datachannel 1024

Minimal android api version is 21 if the matters.

Have anyone run into this issue before?

Cheers,

Alexander