[Freeswitch-users] Early media + T38 in SDP = Codec negotiation error

Hello everybody. Have some problem with fs. I've got codec negotiation error when i try use early_media and sdp has T38 pre_answer() 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4504 Audio Codec Compare [PCMA:8:8000:20:64000:1] ++++ is saved as a match 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMU:0:8000:20:64000:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMU:0:8000:20:64000:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4504 Audio Codec Compare [PCMU:0:8000:20:64000:1] ++++ is saved as a match 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMU:0:8000:20:64000:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [PCMU:0:8000:20:64000:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:101:8000:20:0:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:101:8000:20:0:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:101:8000:20:0:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:101:8000:20:0:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:97:8000:30:0:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:97:8000:30:0:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:97:8000:30:0:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:97:8000:30:0:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:98:8000:30:0:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:98:8000:30:0:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:98:8000:30:0:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [iLBC:98:8000:30:0:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [gsm:3:8000:20:13200:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [gsm:3:8000:20:13200:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [gsm:3:8000:20:13200:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [gsm:3:8000:20:13200:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [speex:99:8000:20:0:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [speex:99:8000:20:0:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [speex:99:8000:20:0:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [speex:99:8000:20:0:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:18:8000:20:8000:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:18:8000:20:8000:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:18:8000:20:8000:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4504 Audio Codec Compare [G729:18:8000:20:8000:1] ++++ is saved as a match 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:18:8000:20:8000:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:100:8000:20:0:1]/[PCMA:8:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:100:8000:20:0:1]/[PCMU:0:8000:20:64000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:100:8000:20:0:1]/[G729:18:8000:20:8000:1] 2017-08-16 08:50:36.337346 [DEBUG] switch_core_media.c:4449 Audio Codec Compare [G729:100:8000:20:0:1]/[G722:9:8000:20:64000:1] 2017-08-16 08:25:36.105410 [DEBUG] switch_core_media.c:4365 Set telephone-event payload to 96@8000 2017-08-16 08:25:36.105410 [DEBUG] switch_core_media.c:3061 Set Codec sofia/external/4995196123@10.34.111.140:5061 PCMA/8000 20 ms 160 samples 64000 bits 1 channels 2017-08-16 08:25:36.105410 [DEBUG] switch_core_codec.c:111 sofia/external/4995196123@10.34.111.140:5061 Original read codec set to PCMA:8 2017-08-16 08:25:36.105410 [DEBUG] switch_core_media.c:4708 Set telephone-event payload to 96@8000 2017-08-16 08:25:36.105410 [DEBUG] switch_core_media.c:4767 sofia/external/123@10.34.111.140:5061 Set 2833 dtmf send payload to 96 recv payload to 96 2017-08-16 08:25:36.105410 [DEBUG] switch_core_media.c:4028 sofia/external/123@10.34.111.140:5061 T38 REFUSE on request 2017-08-16 08:25:36.105410 [ERR] mod_sofia.c:2343 CODEC NEGOTIATION ERROR. SDP: v=0 o=- 1502861170 1502861170 IN IP4 10.34.111.143 s=- c=IN IP4 10.34.84.100 t=0 0 m=audio 53628 RTP/AVP 8 0 101 97 98 3 99 18 100 96 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:101 G729/8000 a=fmtp:101 annexb=yes a=rtpmap:97 iLBC/8000 a=fmtp:97 mode=20 a=rtpmap:98 iLBC/8000 a=fmtp:98 mode=30 a=rtpmap:3 gsm/8000 a=rtpmap:99 speex/8000 a=fmtp:99 mode=3;vbr=off a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:100 G729/8000 a=fmtp:100 annexb=no a=rtpmap:96 telephone-event/8000 a=fmtp:96 0-15 m=image 41690 udptl t38 a=T38FaxRateManagement:transferredTCF a=T38FaxUdpEC:t38UDPRedundancy my codecs: <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMA,PCMU,G729,G722"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMA,PCMU,G729,G722"/> Solution: dont use early media (use execute_on_answer=record_session instead of application=record_session in my case) Does not help: t38 ignore, late negotiation=false, -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/Early-media-T38-in-SDP-Codec-n... 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