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Since build 5.2.660, WCS supports sending and receiving audio and video tracks via the same connection while publishing or playing WebRTC stream. This feature works also for streams inside CDN. This allows to reduce media ports usage and to decrease server load. The feature is supported for both UDP and TCP transport.
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rtp_bundle=false |
RTP bundle inside CDN
Since build 5.2.1759, RTP bundle works also for WebRTC sessions between CDN nodes, including a composite media session used to stream a couple of video qualities in HLS ABR case.
Known issues
1. When RTP bundle is enabled, the statistics still shows 2 busy ports per connection because media ports are reserved before SDP exchange is completed, and server detects how much ports client will use.