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A lightweight real-time streaming library for IP cameras

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SmolRTSP

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SmolRTSP is a simple RTSP 1.0 server library tailored for embedded devices, such as IP cameras. It supports both TCP and UDP, allows any payload format, and provides a convenient and flexible API.

Highlights

  • Small. SmolRTSP is designed for use in embedded systems (e.g., IP cameras).
  • Unopinionated. You can use SmolRTSP with bare POSIX sockets, libevent, or any other network framework.
  • Zero-copy. SmolRTSP does not allocate or copy data while parsing.
  • Battle-tested. SmolRTSP is used by Majestic, an IP camera streamer developed by OpenIPC.

Features

Installation

If you use CMake, the recommended way is FetchContent:

include(FetchContent)

FetchContent_Declare(
    smolrtsp
    URL https://github.com/OpenIPC/smolrtsp/archive/refs/tags/v1.2.3.tar.gz # v1.2.3
)

FetchContent_MakeAvailable(smolrtsp)

target_link_libraries(MyProject smolrtsp)

Options

Option Description Default
SMOLRTSP_SHARED Build a shared library instead of static. OFF
SMOLRTSP_FULL_MACRO_EXPANSION Show full macro expansion backtraces (DANGEROUS: may impair diagnostics and slow down compilation). OFF

Usage

A simple example server that streams H.264 video and G.711 Mu-Law audio can be found at examples/server.c.

server demo

Run it as follows:

$ mkdir examples/build
$ cd examples/build
$ cmake .. && cmake --build .
$ sudo ./server

Then open a new terminal window to start playing:

$ ffplay rtsp://localhost

Integration

SmolRTSP is agnostic to a network backend: you can run it atop of any network/event loop framework. Currently, we support the following integrations:

Feel free to extend this list with your own integration code.

Release procedure

  1. Update the PROJECT_NUMBER field in Doxyfile.
  2. Update CHANGELOG.md.
  3. Release the project in GitHub Releases.

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A lightweight real-time streaming library for IP cameras

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