Book Image

Mastering FreeSWITCH

By : Russell Treleaven, Seven Du, Darren Schreiber, Ken Rice, Mike Jerris, Kalyani Kulkarni, Florent Krieg, Charles Bujold
4 (1)
Book Image

Mastering FreeSWITCH

4 (1)
By: Russell Treleaven, Seven Du, Darren Schreiber, Ken Rice, Mike Jerris, Kalyani Kulkarni, Florent Krieg, Charles Bujold

Overview of this book

FreeSWITCH is one of the best tools around if you’re looking for a modern method of managing communication protocols through a range of different media. From real-time browser communication with the WebRTC API to implementing VoIP (voice over internet protocol), with FreeSWITCH you’re in full control of your projects. This book shows you how to unlock its full potential – more than just a tutorial, it’s packed with plenty of tips and tricks to make it work for you. Written by members of the team who actually helped build FreeSWITCH, it will guide you through some of the newest features of version 1.6 including video transcoding and conferencing. Find out how FreeSWITCH interacts with other tools and APIs, learn how to tackle common (and not so common) challenges ranging from high availability to IVR development and programming advanced PBXs. Great communication functionality begins with FreeSWITCH – find out how and get your project up and running today.
Table of Contents (21 chapters)
Mastering FreeSWITCH
Credits
About the Authors
About the Reviewers
Contributors
www.PacktPub.com
Preface
7
WebRTC and Mod_Verto
Index

Recording calls


Call recording is different from message (prompt) recording. You want to record both the caller and the callee, that is, the entire conversation made by A-leg (caller) and B-leg (callee).

You may want to end up with two files (one file will contain the caller's audio, the other one the callee's speech), or one file that contains the two legs mixed together, or (and this is an elegant and practical solution) one stereo file that will contain the caller's audio on one channel (for example, the left channel), and the callee's on the other (right) channel.

Also, you may want this recording to happen automatically at each call, or to be activated by the end user (or administrator) pressing a special feature key.

Here the dialplan application you want to use is record_session. By default record_session will do the right thing (TM) and record a stereo file containing one leg per channel.

<action application="record_session" data="/tmp/${uuid}.wav"/>

To modify the default behavior...