Wowza Streaming Engine


Version: Wowza Streaming Engine 4.8.5

Wowza Streaming Engine™ is robust, customizable, and scalable media server software that powers reliable streaming of high-quality video and audio to any device, anywhere.

New Features and Functionality

Wowza Streaming Engine 4.8.5 contains several fixes and enhancements that improve the functionality of the media server as well as some exciting new features.

WebRTC updates

Wowza Streaming Engine 4.8.5 includes significant upgrades and fixes for WebRTC functionality. We added support for configuring WebRTC streaming in Wowza Streaming Engine Manager and made WebRTC hosted test pages available for faster learning and testing. Additionally, we improved the accuracy of RTCP feedback messages for adaptive encoding when publishing WebRTC to Wowza Streaming Engine, and we improved the stability of WebRTC session timeouts. We also updated FIR messages to default to a more reliable time-based scheme, which enables a more regular interval for accessing WebRTC streams via a keyframe. For more information about WebRTC and Wowza Streaming Engine, see the following the articles:

SRT improvements

Wowza Streaming Engine 4.8.5 offers enhanced support for Secure Reliable Transport (SRT). We now support SRT version 1.4, which provides increased reliability. Other improvements include a number of new and renamed properties for SRT MediaCaster ingest and SRT stream targets and fixes for outstanding issues. For more information on newly available SRT properties, see the following articles:

Low Latency HLS enhancements

Wowza Streaming Engine 4.8.5 includes adjustments to the Low Latency HLS implementation to keep up-to-date with modifications to Appleā€™s preliminary protocol extension to the HLS spec. We've added support for the EXT-X-PRELOAD-HINT media playlist tag, removed the HTTP/2 push delivery mechanism, and made other minor changes.

Performance upgrades

With Wowza Streaming Engine 4.8.5, we've increased playback performance for connections over SSL/TLS, updated the default server performance tuning, made general WebRTC performance upgrades, and updated MediaCaster ingest performance.

Security improvements

In Wowza Streaming Engine 4.8.5, we've fixed Wowza Streaming Engine Manager security concerns related to CSRF, authenticated XSS, and remote authenticated authorization. We've also added support for additional security-related HTTP headers in request responses, and we've enabled stricter Wowza Streaming Engine file access permissions on Linux and macOS.

System Requirements

Operating systems

The supported operating systems varies by workflow. For non-transcoded streaming, Wowza Streaming Engine media server software can be used on the following 64-bit operating systems:

If you use the Transcoder feature, Wowza Streaming Engine media server software supports the following 64-bit operating systems:

Install the Wowza Streaming Engine on a clean operating system. If you want to update your earlier version of Wowza Streaming Engine to Wowza Streaming Engine 4.8.5, see Update your Wowza Streaming Engine installation for instructions.

Java version

Wowza Streaming Engine 4.8.5 is built on Java 9 (OpenJDK Java SE JRE 9.0.4) and supports Java versions 9 - 12. Earlier versions of Java aren't supported.

Notes: Previous versions of Wowza Streaming Engine media server software were built on Java 8. If you're updating an earlier installation of Wowza Streaming Engine to version 4.7.8 or later, you must install OpenJDK Java SE JRE 9.0.4 before running the Wowza Streaming Engine updater. For your convenience, we've provided the OpenJDK Java SE JRE 9.0.4 files as a zip on the Downloads tab of your Wowza account. For more information, see Manually install and troubleshoot Java on Wowza Streaming Engine.
Browser support for Streaming Engine Manager

You can use Wowza Streaming Engine Manager with the latest versions of most modern web browsers that support HTML5 and Cascading Style Sheets level 3 (CSS 3). We recommend that you use the latest version of the Chrome browser for best results.

Note: Wowza Streaming Engine Manager was tested extensively using the Google Chrome web browser. Manager functionality and performance may vary on other web browsers. Browser updates that occur after this release of Wowza Streaming Engine may also impact functionality and performance and Wowza will work to address any new issues as quickly as possible.


Complete Wowza Streaming Engine documentation is available at Wowza Streaming Engine.

Here are a few links to help you find information on specific areas of Wowza Streaming Engine:


Support is available in the following ways: