Version 21.4.0

Redundancy support for Opus
This release adds RED support for the Opus codec. RED, which stands for REDundant coding, is an RTP payload format defined in RFC 2198 for encoding redundant audio or video data.
Sending redundant data enables the recovery of packets lost under lossy network conditions. If a packet is lost, the missing information may be reconstructed at the receiver from the redundant data that arrives in the following packet(s).
iOS device selection and audio routing enhancements
If you're an iOS user, you'll find that this release enables you to more easily and successfully select and switch between your microphone and speaker devices. In addition, you'll notice that we've improved the audio routing, reducing the chance that you'll run into audio issues on your iOS devices.

For details about the new features and the resolved and known issues for this release, refer to the VidyoClient API Binary Library Release Notes.