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Mastering FreeSWITCH

You're reading from  Mastering FreeSWITCH

Product type Book
Published in Jul 2016
Publisher Packt
ISBN-13 9781784398880
Pages 300 pages
Edition 1st Edition
Languages
Concepts
Authors (8):
Russell Treleaven Russell Treleaven
Profile icon Russell Treleaven
Seven Du Seven Du
Profile icon Seven Du
Darren Schreiber Darren Schreiber
Profile icon Darren Schreiber
Ken Rice Ken Rice
Profile icon Ken Rice
Mike Jerris Mike Jerris
Profile icon Mike Jerris
Kalyani Kulkarni Kalyani Kulkarni
Profile icon Kalyani Kulkarni
Florent Krieg Florent Krieg
Profile icon Florent Krieg
Charles Bujold Charles Bujold
Profile icon Charles Bujold
View More author details
Toc

Table of Contents (21) Chapters close

Mastering FreeSWITCH
Credits
About the Authors
About the Reviewers
Contributors
www.PacktPub.com
Preface
1. Typical Voice Uses for FreeSWITCH 2. Deploying FreeSWITCH 3. ITSP and Voice Codecs Optimization 4. VoIP Security 5. Audio File and Streaming Formats, Music on Hold, Recording Calls 6. PSTN and TDM 7. WebRTC and Mod_Verto 8. Audio and Video Conferencing 9. Faxing and T38 10. Advanced IVR with Lua 11. Write Your FreeSWITCH Module in C 12. Tracing and Debugging VoIP 13. Homer, Monitoring and Troubleshooting Your Communication Platform Index

Conference performances


You can have video mixing or you can have little CPU load. You can't have them both.

And when I'm talking about CPU load I really mean it. For MCU style conferences, get a machine with the most cores and CPUs you can afford. That's the rule of the game. Ask Industrial Light and Magic about video effects and CPU cycles.

That said, let's see how to be Magicians On the Cheap (TM).

You can achieve very good results without sacrificing much, if you don't need fancy effects:

  • pcmu or pcma (for example, g711) audio, one channel (mono), 8khz (support is mandatory in WebRTC and ubiquitous in SIP)

  • video-mode passthrough

  • (be sure no layout is mentioned in conference profile, if one is mentioned, the conference is automatically started in mux video-mode)

With those settings, you'll have an incredibly low CPU load: you're actually just switching between different video inputs, choosing one, and retransmitting it as-is to all participants. As for audio, you get input streams that are not...

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