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CutWire Prism

cutwire.org

Free plan WindowsmacOSLinux
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Spec score 8.0 #13 of 34 in Virtual Camera Software

What it is

CutWire Prism is a free, open-source node-based live video mixer for volunteers, streamers, and small venues. It mixes two decks with a crossfader, AUTO and CUT controls, per-deck speed, and multiple transitions. Sources include video files, images, slideshows, cameras, screen capture, shaders, HTML, text, Lua, NDI, and a phone camera connected by QR. Its Remove BG process uses MediaPipe segmentation to remove a webcam background without a green screen. Prism supports Lua 5.4 scripts and GLSL fragment shaders, including audio-reactive presets. The mixed program can be sent to a projector window, NDI, a virtual camera, or a recording. It can also serve as a virtual camera in OBS, Zoom, or a browser, and OBS can control it over WebSocket. One-click controls include blackout, pausing the current frame, and a Stay Tuned overlay. Prism runs on Linux and Windows; macOS requires a source build and lacks virtual camera output. The project is described as early and under active development.

Spec sheet

Product
CutWire Prism is a node-based live video mixer for volunteers, streamers, and small venues.Read 4 Oct 2026 · cutwire.org
Intended users
The maker describes Prism for school and college events, churches, theatres, community AV, small concerts, clubs, streamers, and local sports broadcasts.Read 4 Oct 2026 · cutwire.org
Integrations
Prism can appear as a virtual camera in OBS, Zoom, or a browser, and OBS can control it over WebSocket.Read 4 Oct 2026 · cutwire.org
Privacy
CutWire says Prism has no telemetry; its privacy policy says website analytics may collect anonymized page views.Read 4 Oct 2026 · cutwire.org
Support
Support is available through documentation, public GitHub issues, and email at [email protected]; the support page says Discord is fastest during a show.Read 4 Oct 2026 · cutwire.org
License
Prism is free and open source under GPLv3.Read 4 Oct 2026 · cutwire.org
AI background removal
A Remove BG process uses MediaPipe segmentation to remove a webcam background without a green screen.Read 4 Oct 2026 · cutwire.org
Development status
The maker describes Prism as early and under active development and invites users to report bugs.Read 4 Oct 2026 · cutwire.org
macOS limitation
Virtual camera output is unavailable on macOS.Read 4 Oct 2026 · cutwire.org
Mixing
It mixes two decks with a crossfader, AUTO and CUT controls, per-deck speed, and multiple transitions.Read 4 Oct 2026 · cutwire.org
Outputs
The mixed program can go to a projector window, NDI, a virtual camera, or a recording.Read 4 Oct 2026 · cutwire.org
Panic controls
One-click controls include Blackout, pausing the current frame, and a Stay Tuned overlay.Read 4 Oct 2026 · cutwire.org
Scripting and shaders
Prism supports Lua 5.4 scripts and GLSL fragment shaders, including audio-reactive presets.Read 4 Oct 2026 · cutwire.org
Sources
Sources include video files, images, slideshows, cameras, screen capture, shaders, HTML, text, Lua, NDI, and a phone camera via QR.Read 4 Oct 2026 · cutwire.org
Supported platforms
Prism is available for Linux and Windows, while macOS requires a source build.Read 4 Oct 2026 · cutwire.org

Plans and prices

Free Free Free forever · no account · no trial · no feature tiers Read 4 Oct 2026 · cutwire.org

Every CutWire Prism plan and price →

Strong points and limits

Strong points

  • Mixes two decks with multiple transitions
  • Accepts video, cameras, slides, NDI, and more
  • Can remove webcam backgrounds without a green screen
  • Supports Lua scripts and GLSL shaders
  • Offers projector, NDI, virtual camera, and recording outputs

Limits

  • macOS requires a source build
  • Virtual camera output is unavailable on macOS
  • Project is early and under active development

Who it suits

Prism suits volunteers and streamers, as well as school and college events, churches, theatres, community AV, small concerts, clubs, and local sports broadcasts. macOS users need to be prepared to build it from source.

Verdict

Prism combines two-deck mixing with a broad set of sources and output options. Check the macOS limitations and active-development status before relying on it for an event.

Where Specifiction places it

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