Membrane Framework is a developer-friendly, customizable multimedia framework for Elixir, built for creating real-time communication systems, media servers, streaming pipelines, and server-side audio-video processing workflows. It gives developers a flexible way to build multimedia solutions by composing pipelines from elements, bins, and plugins that handle formats, codecs, protocols, containers, and external APIs. Membrane Framework can be used to implement WebRTC SFU architectures with modular input and output, making it suitable for applying processing, dumping media at any stage, or creating additional non-WebRTC outputs. Because Membrane is built in Elixir, its pipelines can benefit from scalability, fault tolerance, and easy integration into existing Elixir applications, including Phoenix-based web servers. It supports server-side processing, transcoding, monitoring utilities, real-time communication, and custom media workflows where developers need more control.