Software MansionSM
Software Mansion•3y ago•
22 replies
Al

WebRTC stream not working

I've hit an issue trying to get an MPEGTS stream displaying in the browser via WebRTC.

All seems to work, I can add the WebRTC endpoint for the stream, to the RTC Engine, the web client successfully connects, negotiates tracks, handles the offer and sdpanswer etc and I can add the transceiver for the stream to the RTCPeerConnection and get the MediaStream. When I add the MediaStream to the video element srcObject I get a blank screen with a spinner and see a continuous stream of 
Didn't receive keyframe for variant:
 messages on the server side:
[debug] Responding to STUN request [UDP, session q02, anonymous, client 100.120.41.48:50473]
[debug] No callback function specified for 'stun_query' hook [UDP, session q02, anonymous, client 100.120.41.48:50473]
[debug] <0.2875.0>/{:endpoint, "6adebe85-148e-4fc7-b06d-3246d0b345bd"}/:endpoint_bin/:ice Sending Binding Indication with params: [magic: 554869826, transaction_id: 27660277917344572907996316102]
[debug] <0.2875.0>/{:endpoint, "6adebe85-148e-4fc7-b06d-3246d0b345bd"}/:endpoint_bin/:ice Received Binding Request with params: [priority: 1853825279, magic: 554869826, trid: 27653466564182733022482168431, username: "JBcs:+aQz", use_candidate: true, ice_controlled: false, ice_controlling: true]
[debug] <0.2875.0>/{:endpoint, "6adebe85-148e-4fc7-b06d-3246d0b345bd"}/:endpoint_bin/:ice Sending Binding Success with params: [magic: 554869826, transaction_id: 27653466564182733022482168431, username: "JBcs:+aQz"]
[debug] <0.2875.0>/{:endpoint, "ed395134-d9c5-4f8e-b4a5-5274c0319487"}/{:track_sender, "07DB486FABD21734"} Didn't receive keyframe for variant: high in 500. Retrying.
...

Any clues as to what I'm missing would be greatly received.

For context, I followed the RTC Engine file example and have a main pipeline taking the video output from the MPEGTS demuxer and delivering it to a WebRTC endpoint bin.
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