The new version of Wowza Streaming Engine 4.8.25+2 build (20231003151257) was released on October 4.

2023-10-19 21:25:00

Traditionally for the latest releases of Wowza Streaming Engine, a third of all fixes and new release options relate to transcoding by the AMD Xilinx Alveo U30 graphics card. The process of finalizing this feature continues. We have not yet had the opportunity to evaluate its effectiveness ourselves, but Wowza has published updated performance test data for 3 supported transcoding methods and the results obtained for the U30 are impressive. It should be noted that for some reason the article does not indicate which transcoding template was used for the tests. Apparently, transrate.xml was used with 3 profiles and a maximum encoding resolution of 720p.

The most interesting new feature of this release is support for multiple audio tracks in a published SRT stream. And although module developed by our company has been successfully solving this problem for quite a long time, The presence of such a basic feature in Wowza 4.8.25 is a definite plus.

In addition to functionality improvements, the release includes several interesting fixes, the technical details of which, however, are not disclosed.

  • Updated and improved the Garbage Collector for better memory handling.
  • Improved behavior around HTTPStreamerSessions deadlock and memory.
  • Fixed an issue with the NVENC Transcoder and b-frames that was causing duplicate PTS messages.
  • Fixed an authentication issue with AWS S3 MediaCache sources failing to retrieve content from their respective buckets.

Unfortunately, the problem with decoding certain types of TV streams when using the Nvenc method since version 4.8.14, which we reported to Wowza, has not been resolved in this release. But let's hope for the next one. In general, starting from 4.8.22, things are not bad with Nvenc again.