Specs · real time
Real-time HDR processing.
A real-time video processor and media player for Windows. Free, open source, and built on the PC you already own.
Real time
Every frame is processed as it arrives. DeckLink capture → GPU tone mapping and grade → display. No re-encoding, no export, no cloud round-trip.
- Per-frame processing. Tone mapping and the Zion grade run on every frame.
- GPU pipeline. The renderer draws the graded frame; the ML tree inference runs on the CPU in well under a frame.
- Pull-based live ingest. No read-ahead queue; late frames are dropped rather than queued.
- Live and files. The same real-time pipeline runs for HDMI capture and local playback.
What it is
- A real-time video processor and media player for Windows 10/11.
- Free and open source, GPL-3.0.
- Runs on a PC you already own. A DeckLink card adds live HDMI; file playback needs no capture card.
What it does
- Scene-by-scene HDR tone mapping: Unplugged and GT7 Adapt.
- Zion ML grade: three models, 1,700 trees, 88 features per frame.
- Sky and person segmentation for highlight and skin protection.
- NLS (non-linear stretch): dual-axis, split and centre protection for scope screens.
- Measured display target and DisplayCAL
.cubecalibration. - Deband and adaptive sharpen.
- Media player with subtitle and audio-track switching.
- Presets, passthrough A/B and frame logs.
What it supports
| Live input | 4K HDR10 / HLG / Dolby Vision over HDMI, unencrypted |
|---|---|
| Media player | MKV and MP4; HEVC and AVC; TrueHD/Atmos, DTS-HD and AC-3 |
| Subtitles | SRT, ASS, SSA, PGS and VobSub |
| Output | Tone-mapped SDR; output gamut BT.709 or BT.2020, selectable for the display |
| NLS | Dual-axis non-linear stretch; split axis, centre protection, live on paused frames |
| Hardware | Windows 10/11 x64; DeckLink Quad PCIe or Mini Recorder 4K for live; RTX 4070 tested |
| Calibration | DisplayCAL .cube, applied as the final pass |
How it is controlled
- Native Windows app, keyboard shortcuts and the settings rail.
- Presets, passthrough A/B and frame logs.
On the roadmap
- Osiris — a standalone ARM board with HDMI input.
- COM wrapper — for third-party DirectX players.
Roadmap items are future work, not shipped features.
Availability and price
- Free, GPL-3.0, downloadable now for Windows 10/11 x64.
- No subscription, account or licence key.
Get involved
- Source and releases on GitHub.
- Issue tracker for questions and bug reports.
Requirements and known limitations are on the download page.