Cannot hear the first publisher in multitrack streaming when first joining a room with no A/V

[timantmedia]

Short description

In multitrack conferences, when participants join without video or audio, and then start to publish their A/V, no all participants are able to hear each other.

Environment

• Operating system and version:
• Java version:
• Ant Media Server version:
• Browser name and version:

Steps to reproduce

create the following streams

• stream1 => main track
• stream2 => publisher 1
• stream3 => publisher 2

PUBLISHER 1

• send publish command (streamId = stream2, mainTrack = stream1, video = false, audio = true)
• sending audio level through data channel
• send play command (streamId = stream1, trackList=['!stream2'])

PUBLISHER 2

• send publish command (streamId = stream3, mainTrack = stream2, video = false, audio = true)
• sending audio level through data channel
• send play command (streamId = stream1, trackList=['!stream3"])

PLAYER

• send play command (streamId = stream1)

Depending on timing, when each party joins, the outcome is different

1. publisher 1 starts to publish and then the player starts playing => The player doesn't hear Publisher 1 -> If publisher 2 joins afterward, the player hears publisher 2 but still doesn't hear publisher 1 (in this scenario, publisher 2 hears publisher 1)
2. publisher 1 and Publisher 2 start publishing and then the player starts playing => player hears both Publisher 1 and Publisher 2

Expected behavior

All participants should be able to hear each other all the time when they start publishing.

Actual behavior

Always the first participant that starts to publish is always lost and cannot be heard once more participants join the room.

Logs

Place logs on pastebin or elsewhere and put links here

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[timantmedia]

@burak-58 please can you confirm the customer's specific configuration with Multitrack as I believe its a none standard setup from the default sample multitrack conference. FD107015

[burak-58]

Resolved with https://github.com/ant-media/Ant-Media-Server/issues/6094