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winlinvip opened this issue May 21, 2021 · 2 comments
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When streaming on Chrome and playing on Firefox, the Console displays TWCC exception. #2370

winlinvip opened this issue May 21, 2021 · 2 comments
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@winlinvip
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Bug It might be a bug. TransByAI Translated by AI/GPT. WebRTC WebRTC, RTC2RTMP or RTMP2RTC.
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4.0

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@winlinvip
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winlinvip commented May 21, 2021 •
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Firefox playback failed, TWCC ID abnormal:

Answer has extmap http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01 at level 0 that was not present in offer.

Reproduction steps (must occur):

  • Streaming with Chrome, note that there are no issues if streaming with Firefox.
  • Playback with Firefox, fails.

Firefox Offer is as follows:

v=0
o=mozilla...THIS_IS_SDPARTA-84.0 1665199754991553252 0 IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-256 AC:5F:D2:3B:7B:E6:CA:6A:1C:BC:CC:8D:86:FE:78:AC:9D:00:1A:E1:11:04:DF:7B:7C:E8:75:0E:36:9B:83:AF
a=group:BUNDLE 0 1
a=ice-options:trickle
a=msid-semantic:WMS *
m=audio 9 UDP/TLS/RTP/SAVPF 109 9 0 8 101
c=IN IP4 0.0.0.0
a=recvonly
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:2/recvonly urn:ietf:params:rtp-hdrext:csrc-audio-level
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid
a=fmtp:109 maxplaybackrate=48000;stereo=1;useinbandfec=1
a=fmtp:101 0-15
a=ice-pwd:00ea873b46c5546d22a00817942c9a5a
a=ice-ufrag:a406ed2c
a=mid:0
a=rtcp-mux
a=rtpmap:109 opus/48000/2
a=rtpmap:9 G722/8000/1
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000/1
a=setup:actpass
a=ssrc:2670724214 cname:{6b038746-686f-9c4f-8a10-a063ce53ca71}
m=video 9 UDP/TLS/RTP/SAVPF 120 124 121 125 126 127 97 98
c=IN IP4 0.0.0.0
a=recvonly
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid
a=extmap:4 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=extmap:5 urn:ietf:params:rtp-hdrext:toffset
a=extmap:6/recvonly http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
a=extmap:7 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=fmtp:126 profile-level-id=42e01f;level-asymmetry-allowed=1;packetization-mode=1
a=fmtp:97 profile-level-id=42e01f;level-asymmetry-allowed=1
a=fmtp:120 max-fs=12288;max-fr=60
a=fmtp:124 apt=120
a=fmtp:121 max-fs=12288;max-fr=60
a=fmtp:125 apt=121
a=fmtp:127 apt=126
a=fmtp:98 apt=97
a=ice-pwd:00ea873b46c5546d22a00817942c9a5a
a=ice-ufrag:a406ed2c
a=mid:1
a=rtcp-fb:120 nack
a=rtcp-fb:120 nack pli
a=rtcp-fb:120 ccm fir
a=rtcp-fb:120 goog-remb
a=rtcp-fb:120 transport-cc
a=rtcp-fb:121 nack
a=rtcp-fb:121 nack pli
a=rtcp-fb:121 ccm fir
a=rtcp-fb:121 goog-remb
a=rtcp-fb:121 transport-cc
a=rtcp-fb:126 nack
a=rtcp-fb:126 nack pli
a=rtcp-fb:126 ccm fir
a=rtcp-fb:126 goog-remb
a=rtcp-fb:126 transport-cc
a=rtcp-fb:97 nack
a=rtcp-fb:97 nack pli
a=rtcp-fb:97 ccm fir
a=rtcp-fb:97 goog-remb
a=rtcp-fb:97 transport-cc
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:120 VP8/90000
a=rtpmap:124 rtx/90000
a=rtpmap:121 VP9/90000
a=rtpmap:125 rtx/90000
a=rtpmap:126 H264/90000
a=rtpmap:127 rtx/90000
a=rtpmap:97 H264/90000
a=rtpmap:98 rtx/90000
a=setup:actpass
a=ssrc:3775373710 cname:{6b038746-686f-9c4f-8a10-a063ce53ca71}

SRS Answer is as follows:

v=0
o=SRS/4.0.120(Leo) 140726038015488 2 IN IP4 0.0.0.0
s=SRSPlaySession
t=0 0
a=ice-lite
a=group:BUNDLE 0 1
a=msid-semantic: WMS live/livestream
m=audio 9 UDP/TLS/RTP/SAVPF 109
c=IN IP4 0.0.0.0
a=ice-ufrag:954e83u5
a=ice-pwd:23o0989014zm1e22zst14771v25d1c1a
a=fingerprint:sha-256 C8:EF:48:C8:5D:64:E3:3C:A9:E3:7F:9F:E3:CA:13:28:AB:D3:F5:3D:8B:92:F0:42:BC:64:61:7A:50:F1:03:F4
a=setup:passive
a=mid:0
a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=sendonly
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:109 opus/48000/2
a=fmtp:109 minptime=10;useinbandfec=1
a=ssrc:78474674 cname:1050664v785oi9ro
a=ssrc:78474674 msid:- 991eaf00-ec75-41dd-8d14-33a28ad5276a
a=ssrc:78474674 mslabel:-
a=ssrc:78474674 label:991eaf00-ec75-41dd-8d14-33a28ad5276a
a=candidate:0 1 udp 2130706431 30.240.83.121 8000 typ host generation 0
m=video 9 UDP/TLS/RTP/SAVPF 126 114
c=IN IP4 0.0.0.0
a=ice-ufrag:954e83u5
a=ice-pwd:23o0989014zm1e22zst14771v25d1c1a
a=fingerprint:sha-256 C8:EF:48:C8:5D:64:E3:3C:A9:E3:7F:9F:E3:CA:13:28:AB:D3:F5:3D:8B:92:F0:42:BC:64:61:7A:50:F1:03:F4
a=setup:passive
a=mid:1
a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=extmap:7 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=sendonly
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:126 H264/90000
a=rtcp-fb:126 transport-cc
a=rtcp-fb:126 nack
a=rtcp-fb:126 nack pli
a=fmtp:126 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
a=rtpmap:114 red/90000
a=ssrc:78474675 cname:1050664v785oi9ro
a=ssrc:78474675 msid:- 4a18b92b-953f-42ba-a125-92a0db55fe93
a=ssrc:78474675 mslabel:-
a=ssrc:78474675 label:4a18b92b-953f-42ba-a125-92a0db55fe93
a=candidate:0 1 udp 2130706431 30.240.83.121 8000 typ host generation 0

There are two questions here:

  • The TWCC ID for audio is 3, while the offer is 7.
  • Video has two TWCC IDs, 3 and 7, which are probably incorrect.

TRANS_BY_GPT3
@winlinvip
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winlinvip commented May 21, 2021 •
edited
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Firefox live streaming is normal.

The Firefox offer is as follows:

v=0
o=mozilla...THIS_IS_SDPARTA-84.0 2885198513638972151 0 IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-256 36:CC:F2:61:9D:C5:0B:A0:BE:BD:A5:F2:94:3E:A4:C7:FE:8A:2B:2E:46:08:64:05:84:3F:E8:E0:AA:E7:EF:51
a=group:BUNDLE 0 1
a=ice-options:trickle
a=msid-semantic:WMS *
m=audio 9 UDP/TLS/RTP/SAVPF 109 9 0 8 101
c=IN IP4 0.0.0.0
a=sendonly
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:2/recvonly urn:ietf:params:rtp-hdrext:csrc-audio-level
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid
a=fmtp:109 maxplaybackrate=48000;stereo=1;useinbandfec=1
a=fmtp:101 0-15
a=ice-pwd:ba6f3a03449d61a8e6f593323c8b744f
a=ice-ufrag:94e715ce
a=mid:0
a=msid:- {bfa0bbd3-6923-9745-9d11-e4b937b84e2e}
a=rtcp-mux
a=rtpmap:109 opus/48000/2
a=rtpmap:9 G722/8000/1
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000/1
a=setup:actpass
a=ssrc:2859623225 cname:{905561b3-bc86-0c4f-8a5e-68ef900b0f0a}
m=video 9 UDP/TLS/RTP/SAVPF 120 124 121 125 126 127 97 98
c=IN IP4 0.0.0.0
a=sendonly
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid
a=extmap:4 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=extmap:5 urn:ietf:params:rtp-hdrext:toffset
a=extmap:6/recvonly http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
a=extmap:7 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=fmtp:126 profile-level-id=42e01f;level-asymmetry-allowed=1;packetization-mode=1
a=fmtp:97 profile-level-id=42e01f;level-asymmetry-allowed=1
a=fmtp:120 max-fs=12288;max-fr=60
a=fmtp:124 apt=120
a=fmtp:121 max-fs=12288;max-fr=60
a=fmtp:125 apt=121
a=fmtp:127 apt=126
a=fmtp:98 apt=97
a=ice-pwd:ba6f3a03449d61a8e6f593323c8b744f
a=ice-ufrag:94e715ce
a=mid:1
a=msid:- {c3607790-be53-f54d-9557-ae2ba65344ba}
a=rtcp-fb:120 nack
a=rtcp-fb:120 nack pli
a=rtcp-fb:120 ccm fir
a=rtcp-fb:120 goog-remb
a=rtcp-fb:120 transport-cc
a=rtcp-fb:121 nack
a=rtcp-fb:121 nack pli
a=rtcp-fb:121 ccm fir
a=rtcp-fb:121 goog-remb
a=rtcp-fb:121 transport-cc
a=rtcp-fb:126 nack
a=rtcp-fb:126 nack pli
a=rtcp-fb:126 ccm fir
a=rtcp-fb:126 goog-remb
a=rtcp-fb:126 transport-cc
a=rtcp-fb:97 nack
a=rtcp-fb:97 nack pli
a=rtcp-fb:97 ccm fir
a=rtcp-fb:97 goog-remb
a=rtcp-fb:97 transport-cc
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:120 VP8/90000
a=rtpmap:124 rtx/90000
a=rtpmap:121 VP9/90000
a=rtpmap:125 rtx/90000
a=rtpmap:126 H264/90000
a=rtpmap:127 rtx/90000
a=rtpmap:97 H264/90000
a=rtpmap:98 rtx/90000
a=setup:actpass
a=ssrc:3966929890 cname:{905561b3-bc86-0c4f-8a5e-68ef900b0f0a}

The SRS answer is as follows:

v=0
o=SRS/4.0.120(Leo) 140354640713216 2 IN IP4 0.0.0.0
s=SRSPublishSession
t=0 0
a=ice-lite
a=group:BUNDLE 0 1
a=msid-semantic: WMS live/livestream
m=audio 9 UDP/TLS/RTP/SAVPF 109
c=IN IP4 0.0.0.0
a=ice-ufrag:c07m4nz4
a=ice-pwd:2qitu403ar91338m609e60y9scc02li4
a=fingerprint:sha-256 43:B6:7B:4C:A4:D4:39:1B:4A:3E:1C:F0:11:BE:D9:82:49:4E:14:31:2E:01:0D:66:8C:33:64:E3:25:E0:2C:DB
a=setup:passive
a=mid:0
a=recvonly
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:109 opus/48000/2
a=fmtp:109 ;useinbandfec=1
a=candidate:0 1 udp 2130706431 30.240.83.121 8000 typ host generation 0
m=video 9 UDP/TLS/RTP/SAVPF 126
c=IN IP4 0.0.0.0
a=ice-ufrag:c07m4nz4
a=ice-pwd:2qitu403ar91338m609e60y9scc02li4
a=fingerprint:sha-256 43:B6:7B:4C:A4:D4:39:1B:4A:3E:1C:F0:11:BE:D9:82:49:4E:14:31:2E:01:0D:66:8C:33:64:E3:25:E0:2C:DB
a=setup:passive
a=mid:1
a=extmap:7 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=recvonly
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:126 H264/90000
a=rtcp-fb:126 nack
a=rtcp-fb:126 nack pli
a=rtcp-fb:126 transport-cc
a=fmtp:126 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
a=candidate:0 1 udp 2130706431 30.240.83.121 8000 typ host generation 0
  • There is no TWCC for audio.
  • The TWCC ID for video is 7, and the SRS response is also normal.

TRANS_BY_GPT3

@winlinvip winlinvip changed the title Firefox播放 Firefox播放时，Console显示TWCC异常 May 21, 2021
@winlinvip winlinvip changed the title Firefox播放时，Console显示TWCC异常 Chrome推流，Firefox播放时，Console显示TWCC异常 May 21, 2021
@winlinvip winlinvip added the Bug It might be a bug. label May 21, 2021
@winlinvip winlinvip added this to the SRS 4.0 release milestone May 21, 2021
winlinvip added a commit that referenced this issue May 21, 2021
@winlinvip
Fix #2370 bug for Firefox play stream(published by Chrome). 4.0.121
5df90a2
@MrxKevin
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It's working

@winlinvip winlinvip self-assigned this Aug 27, 2021
@winlinvip winlinvip added the WebRTC WebRTC, RTC2RTMP or RTMP2RTC. label Aug 27, 2021
@winlinvip winlinvip changed the title Chrome推流，Firefox播放时，Console显示TWCC异常 When streaming on Chrome and playing on Firefox, the Console displays TWCC exception. Jul 28, 2023
@winlinvip winlinvip added the TransByAI Translated by AI/GPT. label Jul 28, 2023
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