RTC: fix rtc publisher pli cid

[xiaozhihong]

RTC publisher cycle request PLI, use correct context id.

[winlinvip]

Check by WebRTC publish and play:

grep 'Need PLI' t.log
[2023-01-18 09:28:06.769][INFO][22999][i3oz708r] RTC: Need PLI ssrc=2778412766, play=[i3oz708r], publish=[978q64hp], count=1/1

grep i3oz708r t.log |more
[2023-01-18 09:28:06.757][INFO][22999][i3oz708r] HTTP #0 127.0.0.1:54772 POST http://localhost:1985/rtc/v1/play/, content-length=6945
[2023-01-18 09:28:06.757][INFO][22999][i3oz708r] RTC play webrtc://localhost/live/livestream, api=http://localhost:1985/rtc/v1/play/, tid=8720ddb, clientip=127.0.0.1, app=live, stream=livestream, offer=6387B, eip=, codec=, srtp=, dtls=
[2023-01-18 09:28:06.758][INFO][22999][i3oz708r] ignore attribute=, value=
[2023-01-18 09:28:06.760][INFO][22999][i3oz708r] RTC player nack=1, nnc=1
[2023-01-18 09:28:06.760][INFO][22999][i3oz708r] RTC connection player gcc=3
[2023-01-18 09:28:06.760][INFO][22999][i3oz708r] RTC: Init tracks {track: 03bd982c-a376-426b-bbc8-f21c394028bf, is_active: 0=>1},{track: 0ca3a4fb-c0c1-4efa-b1eb-d3b50ab83066, is_active: 0=>1}, ok
[2023-01-18 09:28:06.760][INFO][22999][i3oz708r] Best matched ip=172.20.10.3, ifname=en6
[2023-01-18 09:28:06.760][INFO][22999][i3oz708r] RTC: Use candidates 172.20.10.3, protocol=udp
[2023-01-18 09:28:06.761][INFO][22999][i3oz708r] RTC init session, user=1428ym3r:CAyM, url=/live/livestream, encrypt=1/1, DTLS(role=passive, version=auto), timeout=30000ms, nack=1

grep 978q64hp t.log |more
[2023-01-18 09:28:02.684][INFO][22999][978q64hp] HTTP #0 127.0.0.1:54744 POST http://localhost:1985/rtc/v1/publish/, content-length=6039
[2023-01-18 09:28:02.685][INFO][22999][978q64hp] RTC publish webrtc://localhost/live/livestream, api=http://localhost:1985/rtc/v1/publish/, tid=3cd128e, clientip=127.0.0.1, app=live, stream=livestream, offer=5558B, eip=, codec=
[2023-01-18 09:28:02.685][INFO][22999][978q64hp] ignore attribute=, value=
[2023-01-18 09:28:02.687][INFO][22999][978q64hp] RTC publisher nack=1, nnc=1, pt-drop=0, twcc=1/3
[2023-01-18 09:28:02.688][INFO][22999][978q64hp] RTC: Init tracks {track: 03bd982c-a376-426b-bbc8-f21c394028bf, is_active: 0=>1},{track: 0ca3a4fb-c0c1-4efa-b1eb-d3b50ab83066, is_active: 0=>1}, ok
[2023-01-18 09:28:02.688][INFO][22999][978q64hp] Best matched ip=172.20.10.3, ifname=en6
[2023-01-18 09:28:02.688][INFO][22999][978q64hp] RTC: Use candidates 172.20.10.3, protocol=udp
[2023-01-18 09:28:02.689][INFO][22999][978q64hp] RTC init session, user=06tt9fw6:qJXA, url=/live/livestream, encrypt=1/1, DTLS(role=passive, version=auto), timeout=30000ms, nack=1

[winlinvip]

Check by

1. Publish by RTMP.
2. Play by WebRTC.
3. Publish by WebRTC.
4. Play by WebRTC.

grep 'Need PLI' t.log
[2023-01-18 09:31:33.018][INFO][22999][4573858y] RTC: Need PLI ssrc=694299555, play=[3192x165], publish=[3192x165], count=1/1

grep 3192x165 t.log |more
[2023-01-18 09:31:29.275][INFO][22999][3192x165] HTTP #0 127.0.0.1:55978 POST http://localhost:1985/rtc/v1/publish/, content-length=6031
[2023-01-18 09:31:29.276][INFO][22999][3192x165] RTC publish webrtc://localhost/live/livestream, api=http://localhost:1985/rtc/v1/publish/, tid=5e44f86, clientip=127.0.0.1, app=live, stream=livestream, offer=5550B, eip=, codec=
[2023-01-18 09:31:29.276][INFO][22999][3192x165] ignore attribute=, value=
[2023-01-18 09:31:29.278][INFO][22999][3192x165] RTC publisher nack=1, nnc=1, pt-drop=0, twcc=1/3
[2023-01-18 09:31:29.279][INFO][22999][3192x165] RTC: Init tracks {track: f450bb34-1711-44e9-9f8f-9287551de27d, is_active: 0=>1},{track: 90e9f082-a5d1-4d97-9676-bc73abfeeca6, is_active: 0=>1}, ok
[2023-01-18 09:31:29.279][INFO][22999][3192x165] Best matched ip=172.20.10.3, ifname=en6
[2023-01-18 09:31:29.279][INFO][22999][3192x165] RTC: Use candidates 172.20.10.3, protocol=udp
[2023-01-18 09:31:29.280][INFO][22999][3192x165] RTC init session, user=49n59fvh:/RNT, url=/live/livestream, encrypt=1/1, DTLS(role=passive, version=auto), timeout=30000ms, nack=1

After RTC2RTMP, the bridge initiates a PLI request, causing both play and publish to be the same.

This confusion is too significant. Can we use the bridge's CID for play? Also, the bridge for RTC2RTMP does not have any logs. It would be helpful to add a log to identify the context of this issue.

TRANS_BY_GPT3