Resolve DLSS5 Experimental

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Windows x64 DaVinci Resolve OpenFX project for an experimental, same-resolution DLSS Neural Rendering video filter.

Unofficial research software. It is not affiliated with or endorsed by Blackmagic Design or NVIDIA.

Download

Use the tagged prerelease from the GitHub Releases page. The binary ZIP contains the complete OFX bundle and a separately distributed community runtime. Git and GitHub source archives contain no DLL.

Current status

Version 0.3.0 is the first implementation verified inside DaVinci Resolve:

• Native OpenFX Filter/General contexts with float RGBA input and output.
• The private Feature 18 D3D12 path follows the verified Magpie contract: application ID 0x0876232C, same-resolution creation, signed-snippet exports, scoped GetModuleFileNameW IAT compatibility, and SEH guards.
• Input and output use the Magpie-verified R8G8B8A8_UNORM neural proxy.
• Motion is zero-filled R16G16_FLOAT; depth is zero-filled R32_FLOAT.
• Source alpha is restored after evaluation.
• A failed initialization/evaluation returns the source frame and shows a persistent OFX error instead of returning black or stale output.
• Runtime events are written to %LOCALAPPDATA%\ResolveDlss5\ResolveDlss5.log.
• Diagnostic Difference x10 and Left / Right Compare output views make a subtle neural change immediately visible.
• The configured community nvngx_dlssnr.dll is copied into the bundle's private runtime directory; manifest.sha256 records both binary hashes.
• A two-live-runtime Feature 18 smoke test passes, and the effect has been confirmed active in Resolve after the multi-instance hook fix.

This remains experimental. The current bridge is deliberately simple and slow: Resolve supplies CPU float frames, the plugin converts them to RGBA8, uploads them to its own D3D12 device, waits for Feature 18, then reads the result back. CUDA/D3D12 zero-copy and real motion/depth are later work.

Inspector parameter contract

The exposed types mirror the controls recovered from the add-on implementation:

Control	OFX type
Enable DLSS Neural Rendering	Boolean
NR Preset	Choice (#1, #2, #3)
NR UI Correction	Boolean
Style	Choice
Intensity / Local Tone / Local Structure / Skin Structure	Double
Use Automatic Mask	Boolean
Input Encoding	Choice
Scene Paper-White Scale / HDR Transfer Strength	Double
Guidance Mode / Depth Convention	Choice
Motion Scale X/Y Multiplier	Double
Output Mix	Double
Output View	Choice (Processed, Difference x10, Left / Right Compare)
Reset NR Feature and Clear History	Push button

Guidance Mode currently exposes the intended diagnostic contract, but all four choices still use zero MV/depth until a real provider is connected.

Build and test

Required build dependencies are not vendored: Visual Studio 2022 with CMake and the C++ workload, CUDA Toolkit 12, the Resolve Developer/OpenFX SDK, and the NVIDIA NGX/DLSS SDK. Configure local paths through environment variables or a private CMakeUserPresets.json copied from the included example:

$env:RESOLVE_OFX_SDK_ROOT = 'C:\path\to\DaVinci Resolve\Support\Developer\OpenFX'
$env:DLSS_SDK_ROOT = 'C:\path\to\DLSS'
$env:DLSSNR_RUNTIME_DLL = 'C:\path\to\nvngx_dlssnr.dll'
cmake --preset vs2022-x64
cmake --build --preset release
ctest --test-dir build\vs2022-x64 -C Release --output-on-failure

The runtime variable is optional for compiling source, but required for the runtime smoke test and for producing an installable release bundle.

Generated bundle:

build\vs2022-x64\bundle\ResolveDlss5.ofx.bundle

Standalone runtime probe:

build\vs2022-x64\Release\ResolveDlss5RuntimeSmoke.exe

Local Resolve installation

Copy the complete bundle to:

C:\Program Files\Common Files\OFX\Plugins

Then restart Resolve and locate DLSS Neural Video Experimental under DLSS Experimental. Do not copy or overwrite NGX files in the DaVinci Resolve installation directory. Removing this one bundle removes the private runtime.

Known limits

• Windows x64 and NVIDIA D3D12 only.
• Same-resolution enhancement only; no Super Resolution or Frame Generation.
• SDR/RGBA8 is the verified path. Linear/scRGB uses a reversible proxy curve; PQ is experimental and has not yet passed a Resolve HDR test matrix.
• Zero motion/depth only in this revision.
• Full-frame synchronous CPU/D3D12 copies make preview performance unsuitable for production use.
• Multiple Resolve OFX instances share a process-level, reference-counted snippet compatibility hook. NGX session operations are globally serialized while each instance retains its own Feature 18 history.
• Community runtime use/distribution remains limited to the user's confirmed personal, noncommercial, non-profit authorization.

Source and release boundary

The source tree is MIT licensed. It intentionally excludes all DLL, SDK, static library, build, and release artifacts. The tagged prerelease ZIP may include the separately supplied community nvngx_dlssnr.dll; see third-party notices for its identity and boundary.

The Feature 18 work is based on implementation experience from the author's experimental Magpie fork. Magpie itself remains GPL-3.0; this repository does not relicense Magpie or code owned by other Magpie contributors.

License

MIT. See LICENSE.