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FAQs
  • How is Phenix real-time streaming different from off the shelf WebRTC?
  • How does Phenix scale WebRTC to millions?
  • What is the difference between a CDN and Phenix?
  • What is the difference between a Channel and a Room?
  • Does Phenix encrypt its Real-Time streams?
  • How does Phenix define Real-Time vs Low Latency?
  • How does Phenix compare with technologies such as CMAF?
  • On which cloud platforms is the Phenix platform deployed?
  • What is the recommended minimum hardware spec for devices to publish from a web browser to Phenix?
  • What WebSocket reconnect mechanisms are built into the Web SDK?
  • What are the benefits of the Phenix hardware encoder?
  • How does Phenix multi-bitrate transcoding work and how do I enable it?
  • What bitrates are used for encoding and publishing?
  • How does Phenix adapt to challenging network connections?
  • How does Phenix handle rapid join rates and broadcast size audiences?
  • Where can I see the status of the Phenix system?
  • When do sessions and sessionIds expire?
  • What is the digest field portion of the Auth token?
  • Which video players support Phenix?
  • Which capture devices are compatible with Phenix?
  • Where can I find documentation of the text chat feature?
  • What size and bitrate should I use for publishing?
  • Does Phenix provide a video player?
  • What effects will 5G have on Phenix?

How does Phenix multi-bitrate transcoding work for adaptive bitrate (ABR) delivery? What do I need to include in my code to enable it?

Phenix provides customers with Adaptive Bitrate (ABR) capabilities for optimal stream quality given each individual viewer's network conditions.

To enable transcoding for real-time multi-bitrate and multi-resolution delivery, you simply pass the multi-bitrate capability on the publisher. You also pass through the desired quality capability. When adjusting bitrate based on Internet connection, we use lower resolutions for lower renditions. Our default MBR policy uses resolution bitrate pairs that are very similar to YouTube. Phenix will automatically transcode to the applicable quality layers below the selected quality level. For example, if you select hd as your top layer, then you get hd, sd , ld, vld , and uld renditions.

There are no requirements on the viewer side to enable ABR streaming. As long as multi-bitrate is set on the publisher, the viewers will automatically connect to the highest quality layer that is sustainable for the network connection. The viewers will also switch between quality layers as needed throughout the duration of their streams.

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