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Version: 5.0

Introduction

SRS is a open-source (MIT Licensed), simple, high-efficiency, real-time video server supporting RTMP, WebRTC, HLS, HTTP-FLV, SRT, MPEG-DASH, and GB28181. SRS media server works with clients like FFmpeg, OBS, VLC, and WebRTC to provide the ability to receive and distribute streams in a typical publish (push) and subscribe (play) server model. SRS supports widely used internet audio and video protocol conversions, such as converting RTMP or SRT to HLS, HTTP-FLV, or WebRTC.

SRS provides an HTTP API open interface to query system and stream status. It also supports HTTP Callback for callback capabilities, actively notifying your system and implementing stream authentication and business customization (such as dynamic DVR). SRS also supports the official Prometheus Exporter for integration with cloud-native monitoring systems, offering powerful observability. SRS supports session-level traceable logs, greatly reducing system maintenance costs.

If you are new to audio, video, and streaming media or new to SRS, we recommend reading Getting Started and Learning Path. Please take the time to read the following documentation, as reading and familiarizing yourself with the documentation is a basic requirement of the community. If you encounter any problems, please first search in the FAQ, then in Issues and Discussions to find answers to almost all questions.

SRS is developed using ANSI C++ (98) and only uses basic C++ capabilities. It can run on multiple platforms such as Linux, Windows, and macOS. We recommend using Ubuntu 20+ for development and debugging. The image we provide ossrs/srs is also built on Ubuntu 20 (focal).

Note: To solve the long connection and complex state machine problems in complex streaming media processing, SRS uses ST(State Threads) coroutine technology (similar to Goroutine) and continuously enhances and maintains ST's capabilities, supporting multiple platforms such as Linux, Windows, macOS, and various CPU architectures like X86_64, ARMv7, AARCH64, M1, RISCV, LOONGARCH, and MIPS.

Who's using SRS?​

SRS users are spread all over the world, and we welcome everyone to showcase their SRS applications in SRS Use Cases.

Governance​

We welcome everyone to participate in the development and maintenance of SRS. We recommend starting by resolving issues from Contribute and submitting PRs. All contributors will be showcased in Contributors.

Milestone​

SRS releases a major version approximately every two years, with one year for development and one year for stability improvement. For more details, please refer to Milestone.

Sponsors​

SRS is committed to building a non-profit open-source project and community. We provide special community support for friends who sponsor SRS. Please see Sponsor.

About SRS Stack​

SRS Stack is a lightweight, open-source video cloud solution based on Go, Reactjs, SRS, FFmpeg, WebRTC, and more. For more details, please refer to SRS Stack.