OpenLiveReplay

OpenLiveReplay is a performant, cross-platform multi-track live video recorder and replay system focused on low-latency capture, synchronized multi-stream recording, and lightweight replay for field use.

Objective: Provide a reliable, low-latency platform for recording and replaying multiple camera feeds simultaneously, optimized for event safety, sports judging, and small-scale live productions.

Target audience:

• Event safety teams and sports judges who need quick, accurate replay and review
• Small production crews and live-event operators exploring compact multi-track workflows

Project status:

• Prototype stage. Core functionality implemented.
• MacOS and iOS builds are functional via automated CMake based pipeline.
• SRT-based recording has been found reliable in testing; project is approaching MVP readiness.

Key features:

• Multi-track synchronized recording (video only)
• Low-latency ingest and replay pipeline
• Support for SRT and RMPT streams, local recording and screenshotting
• MIDI controller support, tested with Behringer X-Touch One

Getting started

1. Clone the repository
2. Open the project in Qt Creator (open the project root or CMakeLists.txt), configure for your target (macOS or iOS), then build.

Notes on dependencies

• The build config downloads or configures native dependencies during CMake configure step, including FFmpeg and RtMidi for macOS and iOS targets.
• Ensure you have a compatible Qt toolchain installed (Qt 6.x recommended) and developer toolchains for the target platform.

Project layout (high level)

• main.cpp, Main.qml — app entry and UI
• recorder_engine/ — muxer, replay manager, recording clock, stream worker
• playback/ — playback worker, transport and frame provider
• midi/ — MIDI integration and manager
• settingsmanager.*, uimanager.* — app settings and UI glue

Contributing

Contributions, issues and feature requests are welcome. Please open issues describing the problem or enhancement and follow the repository's contribution guidelines when submitting pull requests.

License

See LICENSE.md for license terms.

Contact

For questions or collaboration inquiries, open an issue or contact the maintainers via the repository's issue tracker.