![]() ![]() Many phones and platforms also offer the option to schedule a conference call in advance, allowing participants to save the date and time in their respective calendars. It allows multiple people to speak at the same time, making it ideal for meetings, discussions, and collaborations.Ī conference call can be initiated using a conference bridge that allows multiple callers to dial into a specific phone number and then enter a unique access code to join the conference. For app developers, it is also possible to use our Liblinphone library to add conferencing features to an existing app (or to build your own user interface from scratch).A conference call is a telecommunications tool that enables people to communicate with each other from different locations using a phone or online platform.For companies that wish to build their own video conferencing app, we can rebrand the Linphone app for you and deploy the Flexisip server suite on premises or as a cloud service.For Linphone users, our SIP service allows you to benefit from these video conferencing features for free! This service is powered by our Flexisip proxy and conference servers.How can this feature be used or integrated into existing software? ![]() This technology paves the way for a major innovation that we are currently working on: end-to-end encryption for real-time audio and video conferences. ![]() Therefore, the Linphone team developed an SFU algorithm within mediastreamer2 (our media processing library). As the server solution that we were using for instant messaging features was compatible with open standards for managing group chatrooms and their participants, the idea was to enhance this component with media capabilities. Linphone is likely to be the first open-source SIP-based conferencing solution powered by a modern SFU server. This makes it possible to increase the number of participants in a group call. These solutions open the path to conference sessions managed by a server that does not decode the media content. The main benefit of a Selective Forwarding Unit is that it is capable of receiving multiple media streams and then deciding which of these media streams should be sent to each participant. This technology is referred to as a ‘ Selective Forwarding Unit’ ( SFU) or ‘ Selective Forwarding Middlebox’ ( SFM). For example, only the video of the participant who is actively speaking is dispatched to each participant, together with some very low-resolution video streams of the other participants. This constraint led to the emergence of new solutions that transmit a useful subset of the streams received from all the participants to each participant. Interoperability with standard SIP-based video phonesĮxisting audio/video conferencing solutions of the ‘ multipoint control unit’ or ‘ media-mixing unit’ types have proved to be costly in terms of resources when it comes to video processing due to the algorithmic complexity of video codecs.Always reachable and notified in real time thanks to push notifications.Point-to-point encryption with SRTP (with end-to-end encryption coming soon!).Three display modes: active speaker, mosaic, and audio only. ![]() Main features of Linphone’s conferencing solution: On the server side, the Flexisip conference server has been enhanced with a conference establishment mechanism that is compatible with the RFC 4579 (SIP Call Control – Conferencing for User Agents) and a modern Selective Forwarding Unit (SFU) algorithm for routing media streams. Many new functions have been developed in Liblinphone, and new conference calling and meeting scheduling displays have been designed in version 5.0 of Linphone for the iOS, Android, and desktop platforms. This major new feature is the result of intensive R&D work conducted on the Linphone apps, the Liblinphone library, and our Flexisip server suite. The Linphone team is happy to announce the official release of its group video calling solution! It is now possible to schedule a conference call with several participants or to place an ad hoc group call. ![]()
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