Next Stop: GStreamer Conference 2025 in London, UK

I promise I won’t use ML to write the blog this time. Just my Emacs and me, and a little copy-paste.

The GStreamer Conference 2025 is just around the corner, and Fluendo is excited to be a proud sponsor and presenter once again. This year, the event will take place from October 23 to 26 in London, UK, bringing together industry experts, developers, and enthusiasts to share the latest advancements in multimedia frameworks.

As usual, Fluendo will be hosting several engaging and interesting technical talks, sharing our expertise in GStreamer and our experiences with related technologies. Take a sneak peek at the topics we will be presenting! 

Fluendo’s GStreamer Conference 2025 talks

Gst.wasm season 3 by Jorge Zapata and Fabián Orccón

The purpose of this talk is to present the changes made after last year’s presentation. Initially, we will show again the goal behind this project, along with the following project’s changes:

• WebTransport support in GStreamer
• Optimizing GStreamer with ORC for WASM
• Upstreaming process
• Real-life usage

VVC/H.266 Alpha Channel support in GStreamer by Andoni Morales

Alpha Channel is an essential tool in modern video workflows, enabling transparency and visual effects as required in telepresence and Virtual Reality applications, or modern websites. The Versatile Video Coding (VVC/H.266) standard supports Alpha Channel natively by encoding transparency data as an independent auxiliary layer signaled via SDI and ACI SEI messages (ITU H.274).

This presentation details the work to integrate this standard-compliant VVC/H.266 alpha channel support into VVenc and GStreamer for encoding and decoding streams with transparencies.

The presentation will cover the following topics:

• Introduction to Alpha Channel
• Alpha Channel support in video codecs
• Alpha Channel decoding support in GStreamer with GstAlphaDecodeBin
• VVC/H.266 Alpha Channel encoding with VVenc
• VVC/H.266 Alpha Channel decoding with GStreamer
• Encoding and decoding demo

Tools to profile a video encoder by Diego Nieto

This talk presents the implementation of a video encoder analysis within GStreamer. We’ll demonstrate our video-encoder-stats element that collects real-time encoding performance metrics including bitrate, processing time, CPU usage, and VMAF quality scores, attaching this data as metadata to video buffers throughout the pipeline. The presentation covers our video-compare-mixer element that enables side-by-side visual comparison of multiple encoder outputs with interactive navigation controls, supporting various backends. We’ll showcase how these elements work together in our demo tool. (src here)

Fluster news by Rubén Gonzalez

This talk will present new features, important changes and bugfixes that are part of Fluster releases 0.2.x-0.5.x. Emphasizing two very useful new features

• A new pixel comparison method that allows tolerance with the reference decoder.
• Addition of profile information and reports.

Also, we would like to present some numbers, eg. increase in number of available decoders, test suites, test vectors and possibly other metrics.

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Visit the official GStreamer Conference 2025 website for more information on the event, detailed schedules, and registration.

Andoni Morales will also be participating in the Foundations of Open Media Standards and Software (FOMS) Workshop 2025 next week. If you’re there, don’t hesitate to say hello.

Stay tuned to our blog for updates as the event approaches. We look forward to seeing you online or in London!