Latest software updates for Wowza Streaming Engine

Wowza Media Systems™ regularly releases Wowza Streaming Engine™ media server software builds with new features and functionality. You can install the software on your computer using an installer, or if you already have Wowza Streaming Engine installed, you can update it with a build updater.

Note: If you have problems with or want to provide feedback about our software updates, contact Wowza Technical Support. To learn about the variety of support resources that we offer to our user community, see our Support Resources webpage.

Latest production release 

The latest Wowza Streaming Engine production build is Wowza Streaming Engine 4.7.8 build 20191105123929 released on November 5, 2019.

For a complete list of changes in this build, see the Release Notes.

New features and functionality in Wowza Streaming Engine 4.7.8

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. Wowza Streaming Engine 4.7.8 contains several fixes and enhancements that help to improve the functionality of the media server software.

Support for Low-Latency HLS

Wowza Streaming Engine can now produce Low-Latency HLS live streams. Low-Latency HLS streams conform to Apple’s preliminary protocol extension to the HLS spec.

Note: The Low-latency HLS live streams produced by Wowza Streaming Engine version 4.7.8 conform to the version of this Apple specification published on July 25, 2019. This implemention does not support skip tags or renditions reports.

Wowza Streaming Engine generates Low-Latency HLS streams using the CMAF packetizer, which, in addition to generating CMAF segments, also generates smaller units of content called chunks. These CMAF-compliant chunks double as partial segments for Low-Latency HLS streaming. As a result, you can use the CMAF packetizer to generate Low-Latency HLS streams that use the fMP4 container format and are delivered to players over HTTP/2.

For more information about Low-Latency HLS, see our technical article Deliver Apple Low-Latency HLS live streams using Wowza Streaming Engine.

You can also find information about both CMAF and Low-Latency HLS in the article Understanding protocols and formats supported by Wowza Streaming Engine.

Support for CMAF

Wowza Streaming Engine now also supports Common Media Application Format (CMAF), the open, extensible standard that enables efficient streaming using the HLS and MPEG-DASH protocols. Wowza Streaming Engine can deliver both single and adaptive bitrate HLS and MPEG-DASH live streams using the single new cmafstreamingpacketizer, which wraps stream segments in the fMP4 container format and delivers streams over HTTP/1.1. For more information about using CMAF in Wowza Streaming Engine, see any of these technical articles:

Get the latest production release

  • New Wowza Streaming Engine installation
    Installers for this Wowza Streaming Engine build are available on our Downloads webpage and can be used to install a new Wowza Streaming Engine instance.
  • Update an existing Wowza Streaming Engine installation
    To update a Wowza Streaming Engine installation, sign in to your Account Management page using your Wowza account and then check the My Downloads tab for the latest updater for your Wowza Streaming Engine version. You must have an active Maintenance and Support contract to receive updaters. For more information, see Wowza Streaming Engine Maintenance and Support.
    Note: You must have an active Maintenance and Support contract to receive updaters.

Latest beta release

Between production software releases, Wowza produces beta builds so you can get the latest bug fixes and improvements for Wowza Streaming Engine and get early access to new features being developed. Although the improvements and enhancements have been tested by QA, full regression testing and performance testing hasn't been performed on beta builds. Support for beta builds is fully available, but there is no guarantee of hotfixes. Contact support if you want access to a beta build that includes these fixes and enhancements.

The latest Wowza Streaming Engine beta build is Wowza Streaming Engine build 20191213122357.

Changes since the latest production release

  • Fixed issue with DVR recording with 48kHz audio and DASH playback that resulted in bad segment duration values in the DASH MPD.
  • Fixed issue where stream targets unnecessarily sent IGMP join when pushing our a stream. This caused PAT and PMT errors and caused extra network traffic.
  • Fixed an issue with SRT streams using the Medicacaster didn't notify stream targets correctly of the stream starting (onStreamStart).
  • Fixed an issue with restarting long-running source streams that could trigger a memory leak in the MPEG-DASH and CMAF live packetizers.
  • Updated WebRTC session timeouts so clients won't disconnect as quickly when sources drop.
  • Fixed an issue that caused uninitialized memory to be returned to users if a thumbnail was requested for an incomplete frame.
  • Fixed a Java non-heap memory leak with the creation and destruction of the thumbnailer.
  • Removed the Google protobuf library.
  • Fixed several security vulnerabilities in Wowza Streaming Engine Manager.
  • Added support for Apple Low-Latency HLS EXT-X-SKIP tag and _HLS_skip query on playlist requests.
  • Added support for Apple Low-Latency HLS segment HOLD-BACK attribute on EXT-X-SERVER-CONTROL tag.
  • Restored HttpStreamerItem.getLiveStreamPacketizer() and HttpStreamerItem.getLiveStreamRepeater() in the Wowza Streaming Engine Java API. These were accidentally removed in Wowza Streaming Engine 4.7.8.
  • Restored the leading forward slash in responses to Request.getRequestURI() in the Wowza Streaming Engine Java API. This was accidentally removed in Wowza Streaming Engine 4.7.8.
  • Updated the Wowza Streaming Engine Manager Tomcat web.xml file to use the default HTTP Header Security Filter.
  • Updated the XStream library to version
  • Fixed an issue with audio-only and video-only streams packaged into MPEG-TS files for HLS that resulted in improper segment duration values.
  • Fixed a null pointer exception that occurred when initializing SSL configurations for some stream targets.
  • Fixed a transcoder issue with the sampling rate and channel number not being set for the Speex decoder.