Bugfix 3.9.1 Release notes

Hey everyone, bugfix release 3.9.1 is now available. We've found a few things we wanted changed, but not enough to consider as a full release. If you want to know more we recommend looking at the full changelog.

Downloads can be found here.

Noteworthy Changes

Logout API call

There's a new API call to log out, which forces a clear of the authentication state of an API connection. This is necessary for browsers that can re-use previous connections even after log out

Track-ID based track selector

You can now use the track id (or pid) of a track within a stream. This works for video, audio and metadata. It can be done by adding an i# as selection. For example selecting the video track 256 you can use ?video=i256 for more information see track selectors.

Improvement EFPS / EFPKS

The effective frames per second and effective frames per kilo second have been improved to be caucluated over time rather than a single measure. This makes them far more accurate, though it can take up to 10 seconds before it's done measuring.

Metadata improvement

Stream health information now includes the track index and the (effective) frames per second.

Shared memory statistics in capabilities API call

Shared memory statistics are now available in the capabilities API call. Visible on the server stats page

Simulate live option is removed from the interface

This was an option that was never meant to be user-facing rather set automatically depending on the input used. Most notable playlist inputs, the option has been removed as it can cause unexpected/wrong behaviour if set wrongly.

Bugfix: JWK memory leak

There was a memory leak if JWKs were loaded from an URL. This has been patched.

Bugfix: DTSC memory leak

DTSC output could cause a minor memory leak when connections did not have enough bandwidth.

Bugfix: UDP API no longer respons to requests coming from its own listening port. This could sometimes happen and caused 100% CPU usage due to a loop.

Push statistics no longer accidentally pick up non-push SRT connections

Several other bugfixes and improvements.

Hey everyone!

Like every year, the MistServer team will be exhibiting at IBC2025!
If you're planning on attending, be sure to drop by and say hi.
We’ll be happy to share our latest updates, upcoming plans or even steal a few great ideas from you if you've got them.

Our booth can be found at 5.F43

Note: IBC will charge for tickets unless you use a customer code.
Feel free to use ours: IBC6310. You’ll need this near the end of the signup process.

Using the code will make entry free, but also forward the information you enter during signup to us. We will send you a single "thank you" email and then throw that data away.

Here are just a few of the things we’ll be showcasing:

Presentation: Building your own media pipeline powered by Open Source software

Speaker: Jaron Viëtor
Day: Sunday 14 Sep
Time: 12:45-13:00
Location: Hall 5 (5.A28)

Modular streaming platform powered by MistServer

Most streaming platforms lock you into their ecosystem. We do things differently and give you the keys.
MistServer is fully open source, and not only can you self-host your own platform, we actually recommend it.
Run and own everything yourself, yet be able to count on our team for support, advice and custom development.

Broadcast quality & encoding

MistServer has always focused on stream repackaging and internet distribution,
resulting in a robust server that supports nearly every streaming protocol.
However, one area we've been limited in is raw video signals and encoding.
That’s about to change. This year, we're introducing support for raw video signals such as SDI, NDI and (USB) webcams, along with encoding and decoding capabilities.
This means you can now build a complete studio-to-studio or studio-to-server contribution setup using just MistServer.

Updates & improvements

One of our most common questions: What’s new? Fortunately, our changelog has the details, but feel free to ask us in person anyway. We’re always happy to talk shop!