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Can't receive screen share #27297

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jdm opened this issue Jul 16, 2020 · 2 comments
Open

Can't receive screen share #27297

jdm opened this issue Jul 16, 2020 · 2 comments
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A-content/webrtc

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@jdm
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jdm commented Jul 16, 2020

Visit https://www.webrtc-experiment.com/screen-sharing/ in Firefox, then open the private link in Servo. Press "Share Your Screen" in Firefox and the shared screen appears in Firefox, but not in Servo.
@jdm
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jdm commented Jul 16, 2020

Actually, pressing the "View" button yields this:

godot:servo jdm$ GST_DEBUG=3 ./mach run "https://www.webrtc-experiment.com/screen-sharing/#8013186679602875" --pref dom.webrtc.enabled
current chromeMediaSource screen
chrome message ping
undefined ———— undefined
""
setting remote descriptions v=0
o=mozilla...THIS_IS_SDPARTA-80.0a1 139949504604466111 0 IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-256 03:7B:2D:6A:C2:E3:8B:01:AB:8B:FB:61:BB:3D:8E:7B:EE:67:BB:17:32:76:CD:6F:31:FC:2D:25:57:8C:4D:16
a=group:BUNDLE 0
a=ice-options:trickle
a=msid-semantic:WMS *
m=video 9 UDP/TLS/RTP/SAVPF 121 120 124 125 126 127 97 98
c=IN IP4 0.0.0.0
a=sendrecv
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:120 x-google-min-bitrate=256; x-google-max-bitrate=256
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:b6191338d53b74339291485603919b8b
a=ice-ufrag:bc35b566
a=mid:0
a=msid:{edcf6136-5a4f-1a49-9735-5d2fd795fa4c} {78c9f35f-8644-c843-a681-b82a6c81493a}
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=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:1315846619 cname:{bd315620-1106-7541-b3bb-3d1ea1616d6c}
a=ssrc:122179721 cname:{bd315620-1106-7541-b3bb-3d1ea1616d6c}
a=ssrc-group:FID 1315846619 122179721

{
————"candidate": "{\"candidate\":\"candidate:0 1 UDP 2122252543 192.168.0.139 56158 typ host\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice candidate:0 1 UDP 2122252543 192.168.0.139 56158 typ host
{
————"candidate": "{\"candidate\":\"candidate:5 1 TCP 2105524479 192.168.0.139 9 typ host tcptype active\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice candidate:5 1 TCP 2105524479 192.168.0.139 9 typ host tcptype active
{
————"candidate": "{\"candidate\":\"candidate:0 2 UDP 2122252542 192.168.0.139 53878 typ host\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice candidate:0 2 UDP 2122252542 192.168.0.139 53878 typ host
{
————"candidate": "{\"candidate\":\"candidate:5 2 TCP 2105524478 192.168.0.139 9 typ host tcptype active\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice candidate:5 2 TCP 2105524478 192.168.0.139 9 typ host tcptype active
{
————"candidate": "{\"candidate\":\"candidate:1 1 UDP 1686052863 167.100.78.229 56158 typ srflx raddr 192.168.0.139 rport 56158\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice candidate:1 1 UDP 1686052863 167.100.78.229 56158 typ srflx raddr 192.168.0.139 rport 56158
0:00:08.476186000 99932 0x7fbf86b07c60 ERROR              webrtcice gstwebrtcice.c:423:_add_stun_server:<webrtcice0> Stun server 'stun:stun.l.google.com:19302' has no host, must be of the form stun://<host>:<port>
0:00:08.580374000 99932 0x7fbf8901db00 FIXME                default gstutils.c:3981:gchar *gst_pad_create_stream_id_internal(GstPad *, GstElement *, const gchar *):<nicesrc0:src> Creating random stream-id, consider implementing a deterministic way of creating a stream-id
0:00:08.580468000 99932 0x7fbf8901db00 WARN                GST_PADS gstpad.c:4231:gboolean gst_pad_peer_query(GstPad *, GstQuery *):<nicesrc0:src> could not send sticky events
0:00:08.585259000 99932 0x7fbf8901db60 FIXME                default gstutils.c:3981:gchar *gst_pad_create_stream_id_internal(GstPad *, GstElement *, const gchar *):<nicesrc1:src> Creating random stream-id, consider implementing a deterministic way of creating a stream-id
0:00:08.585294000 99932 0x7fbf8901db60 WARN                GST_PADS gstpad.c:4231:gboolean gst_pad_peer_query(GstPad *, GstQuery *):<nicesrc1:src> could not send sticky events
{
————"candidate": "{\"candidate\":\"candidate:1 2 UDP 1686052862 167.100.78.229 53878 typ srflx raddr 192.168.0.139 rport 53878\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice candidate:1 2 UDP 1686052862 167.100.78.229 53878 typ srflx raddr 192.168.0.139 rport 53878
0:00:08.657570000 99932 0x7fbf8bc3ab00 WARN                     bin gstbin.c:2788:gboolean gst_bin_do_latency_func(GstBin *):<webrtc main> did not really configure latency of 0:00:00.000000000
0:00:08.671607000 99932 0x7fbf8981a920 FIXME               basesink gstbasesink.c:3248:gboolean gst_base_sink_default_event(GstBaseSink *, GstEvent *):<nicesink0> stream-start event without group-id. Consider implementing group-id handling in the upstream elements
0:00:08.671983000 99932 0x7fbf8981a980 FIXME               basesink gstbasesink.c:3248:gboolean gst_base_sink_default_event(GstBaseSink *, GstEvent *):<nicesink1> stream-start event without group-id. Consider implementing group-id handling in the upstream elements
local-sdp "v=0\r\no=- 139949504604466111 0 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=ice-options:trickle\r\na=group:BUNDLE 0\r\nm=video 9 UDP/TLS/RTP/SAVPF 121\r\nc=IN IP4 0.0.0.0\r\na=ice-ufrag:cjZTxz+kzs9A9knEBouNHXdwnZ8tFvhR\r\na=ice-pwd:zRS2oFpI0+LbbGMXIlZ2jFXCTDK6FeUi\r\na=mid:0\r\na=rtcp-mux\r\na=setup:active\r\na=rtpmap:121 VP9/90000\r\na=rtcp-fb:121 nack pli\r\na=rtcp-fb:121 ccm fir\r\na=fmtp:121 max-fs=12288;max-fr=60\r\na=recvonly\r\na=fingerprint:sha-256 5C:37:AF:86:9C:3B:09:BD:6D:6D:B0:84:21:4F:8F:08:8E:1F:3F:9F:58:86:E1:B9:0C:42:15:5A:9C:36:CE:14\r\n"
{
————"candidate": "{\"candidate\":\"\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"bc35b566\"}",
————"to": "qesw621atsuxsqyy8c5",
————"userid": "fff"
}
adding ice

(<unknown>:99932): libnice-CRITICAL **: 11:45:21.090: nice_agent_parse_remote_candidate_sdp: assertion 'sdp != NULL' failed
0:00:08.686392000 99932 0x7fbf86b07c60 WARN               webrtcice gstwebrtcice.c:622:gst_webrtc_ice_add_candidate:<webrtcice0> Could not parse candidate '(null)'
{
————"roomid": "httpswwwwebrtc-experimentcomscreen-sharing8013186679602875",
————"broadcasting": true,
————"userid": "fff"
}
{
————"roomid": "httpswwwwebrtc-experimentcomscreen-sharing8013186679602875",
————"broadcasting": true,
————"userid": "fff"
}
{
————"roomid": "httpswwwwebrtc-experimentcomscreen-sharing8013186679602875",
————"broadcasting": true,
————"userid": "fff"
}
{
————"roomid": "httpswwwwebrtc-experimentcomscreen-sharing8013186679602875",
————"broadcasting": true,
————"userid": "fff"
}
{
————"roomid": "httpswwwwebrtc-experimentcomscreen-sharing8013186679602875",
————"broadcasting": true,
————"userid": "fff"
}

@jdm
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jdm commented Jul 16, 2020

A couple errors stick out:

0:00:08.476186000 99932 0x7fbf86b07c60 ERROR              webrtcice gstwebrtcice.c:423:_add_stun_server:<webrtcice0> Stun server 'stun:stun.l.google.com:19302' has no host, must be of the form stun://<host>:<port>

And:

(<unknown>:99932): libnice-CRITICAL **: 11:45:21.090: nice_agent_parse_remote_candidate_sdp: assertion 'sdp != NULL' failed
0:00:08.686392000 99932 0x7fbf86b07c60 WARN               webrtcice gstwebrtcice.c:622:gst_webrtc_ice_add_candidate:<webrtcice0> Could not parse candidate '(null)'

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