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Snowmix
What it is
Snowmix is free, open-source command-line software for dynamically mixing live audio and video feeds. It can combine video, images, text, and graphic elements, with animation, clipping, and blending for scene composition. OpenGL support adds 3D graphics through CPU-based off-screen rendering or hardware-accelerated GPU rendering. Chroma keying for green or blue screens is supported from version 0.5.2. Snowmix uses GStreamer scripts for audio and video input and output, and its shared-memory model works with GStreamer shmsink and shmsrc. Example scripts handle RTSP input and output as RTP, to a TCP server, or to an MP4 file. Embedded Tcl and Python interpreters support scripting. The tool can run without a display and be controlled remotely over low-bandwidth TCP connections. Snowmix supports Linux and macOS, although native macOS support is temporarily limited. The maintainer distributes source code rather than binaries, so users compile it themselves. It is intended for people building their own video mixer, not for point-and-click use.
For and against
For
- Free, open-source video mixer
- Mixes video, images, text, and graphics
- OpenGL 3D rendering with CPU or GPU options
- Tcl and Python scripting support
- Remote operation without a display
Against
- Not designed as a point-and-click application
- Maintainer provides source, not binaries
- Native macOS support is temporarily limited
- Not tested on Windows
The verdict
Snowmix offers programmable scene composition and streaming paths for custom mixer builds. Its command-line workflow and source distribution require technical setup rather than visual desktop operation.
Who it suits
Snowmix suits technical users assembling custom live audio and video mixer systems. It is intended for people comfortable with command-line tools, scripting, GStreamer, and compiling source code.
Plans and prices
Snowmix
Free and open source video mixer
Read 7 Oct 2026 · snowmix.sourceforge.io
On the record
- 3D graphics
- Snowmix supports 3D graphics through OpenGL, using CPU-based off-screen or hardware-accelerated GPU rendering.snowmix.sourceforge.io · read 7 Oct 2026
- Chroma key
- Chroma keying for green or blue screens is supported from version 0.5.2.snowmix.sourceforge.io · read 7 Oct 2026
- Distribution
- Snowmix is distributed free as open-source software, and the maintainer does not provide binaries; users can download the source and compile it.snowmix.sourceforge.io · read 7 Oct 2026
- GStreamer
- Snowmix uses GStreamer scripts for audio and video input and output, and its shared-memory model is compatible with GStreamer shmsink and shmsrc.snowmix.sourceforge.io · read 7 Oct 2026
- Intended user
- Snowmix is a specialized tool for people building their own video mixer system and is not intended as an easy point-and-click application.snowmix.sourceforge.io · read 7 Oct 2026
- Purpose
- Snowmix is a command-line tool for dynamically mixing live audio and video feeds.snowmix.sourceforge.io · read 7 Oct 2026
- Remote operation
- Snowmix is designed to run without a display and be controlled remotely over low-bandwidth TCP connections.snowmix.sourceforge.io · read 7 Oct 2026
- Scripting
- Snowmix supports simple and advanced scripting, including embedded Tcl and Python interpreters.snowmix.sourceforge.io · read 7 Oct 2026
- Security and compliance
- The official pages opened provide no security or compliance claims.snowmix.sourceforge.io · read 7 Oct 2026
- Streaming input and output
- Example scripts support input from RTSP streams and output as RTP, to a TCP server, or to an MP4 file.snowmix.sourceforge.io · read 7 Oct 2026
- Support
- A free support forum is available for Snowmix questions, while paid consultancy is offered for Snowmix, streaming, audio and video coding, and network architecture.snowmix.sourceforge.io · read 7 Oct 2026
- Supported systems
- Version 0.5.2.2 was tested on listed Linux distributions and macOS versions through Monterey; newer macOS versions are prepared for but untested, and native macOS support is temporarily limited.snowmix.sourceforge.io · read 7 Oct 2026
- Video and graphics
- It supports overlaying and mixing video, images, text, and graphic elements, with animation, clipping, and blending.snowmix.sourceforge.io · read 7 Oct 2026
- Windows limitation
- Snowmix has not been tested on Windows, and its GStreamer shared-memory modules depend on POSIX features unavailable on native Windows.snowmix.sourceforge.io · read 7 Oct 2026
