R1.0.0 Beta4

R1.0.0 Beta4 - Major pipeline optimizations, Master Reference and NVIDIA support

Rendering modes

• Dolby Vision Standard: accepts near-imperceptible image differences to deliver substantially higher rendering performance.
• Dolby Vision Master Reference: new TV-Led pipeline aiming for bit-perfect playback, preserving the original pixels and metadata. The N100 handles all tested sources in this mode, including 4K FEL remuxes and 4K60 content.
• Dolby Vision Adaptive HDR Mapping: replaces Natural and Signature with a single mode. Expands highlights and selected midtones using the original metadata and configured display capabilities, with shadow protection and temporal stabilization.
• Adaptive processing also supports HDR10 input through AI-generated Dolby Vision metadata.

Performance

• AMD Performance, performance improvement on AMD CPUs thanks to dedicated rendering pipelines optimization.
• Major performance improvements to HDR10 to Dolby Vision AI, reducing analysis overhead, redundant processing and preparation delays.
• Substantially optimized Dolby Vision to HDR10 Basic and Expert, including FEL reconstruction and direct presentation.
• Optimized Master Reference by removing redundant reconstruction, intermediate surfaces and copies without changing the reference calculations.
• Improved Adaptive processing through reduced memory traffic, streamlined shaders and earlier FEL preparation.
• Added automatic fast rendering, using a 2.5 ms presentation-margin threshold. Player information reports its active state.
• Master Reference remains non-Fast. Automatic performance recovery can switch to Standard when necessary, with a notification.

Image processing

• Corrected Expert output-volume limiting, including BT.2020 peak-brightness overshoot.
• Improved Expert handling of missing or inconsistent L1 statistics and compatible L8 trims.
• Corrected the processing domain of CM4 trim commands in HDR10 Expert.
• Improved Adaptive pixel/metadata consistency and addressed reported darkening and brightness instability.

Hardware and 3D

• Added an NVIDIA backend for Turing and newer, including NVDEC integration, HDMI Dolby Vision signaling and shared CB1 processing.
• Improved Dolby Vision capability detection on supported Intel HDMI paths.
• Corrected Blu-ray 3D stereo-output selection when native HDMI 3D modes are unavailable.
• Added progressive 1080p half-side-by-side HDMI modes at 24, 50 and 60 Hz.
• Retained separate native 3D playback, outside Dolby Vision processing.

Playback and interface

• Fixed an L10 metadata-parser freeze affecting some Dolby Vision files.
• Improved startup, seeking, BL/EL pairing and recovery after interrupted preparation.
• Fixed rendering-mode transitions, stale textures and unfinished-frame cancellation.
• Corrected L5 handling with menus and overlays.
• Improved native Kodi format reporting for skin integration.
• Simplified Player information: actual TV-Led/Fast state, relevant display-profile fields and supported render-engine usage.
• Quick rendering selection remains available through the O panel cycle.

Known limitations

• Heavy conversions and visible menus can still exceed N100 rendering capacity, particularly at 60 FPS.
• When Dolby Vision Master Reference is enable, you can not take a screenshot.
• Adaptive rendering remains subject to visual refinement.
• NVIDIA hardware playback and AMD HDMI 3D still require further physical validation.

Next Focuses

• Move to a stable release : small clean in the repo, bug fixing and rendering pipelines fine tunning following feedbacks : Please share your feedback and your issue here : https://github.com/CroqueMr/libreelec-x86-DV/issues or here https://forum.libreelec.tv/thread/30362-x86-64-dolby-vision-w-fel-full-3d-for-pc-intel-amd-nvidia/

Credits

• hadesdevls: NVIDIA support, adapted from LibreELEC Hades.
• dangerouslaser: L5 active-area fix for menus and overlays.
• CinemaOne and popcornmix: upstream Blu-ray 3D work used for the AMD integration and stereo-output fixes.

R1.0.0 Beta3

R1.0.0 Beta3 - Major stability and performance improvements, plus AMD Blu-ray 3D support

Smooth Dolby Vision playback on N100, from demanding 4K 60 FPS remuxes to 4K FEL remuxes.

Changes since Beta2.

Rendering and performance

• Added optional Dolby Vision fast rendering, disabled by default. Significantly reduces rendering load with fine colour-detail differences expected to be almost imperceptible during playback. Disabling it restores the reference chroma filter.
• Optimized Dolby Vision HDMI packing, avoiding redundant colour-conversion and PQ processing.
• Reused the active HDMI mode during playback instead of requesting a modeset for every frame.
• Optimized menu and subtitle composition, overlay caching and transparent-colour blending.
• Reduced repeated metadata reshaping calculations by merging identical MMR intervals without changing their coefficients.
• Added automatic VAAPI FEL upscaling where supported, with shader fallback. Applies to Dolby Vision Native, Enhanced and HDR10 conversion.
• Isolated CB1 rendering from Kodi picture adjustments. Native playback and fallback retain Kodi's settings.

Dolby Vision transport and GUI optimizations incorporate work from dangerouslaser, adapted to the shared CB1 rendering pipeline.

Dolby Vision detection and output

• Fixed rendering modes incorrectly marked unavailable when the Kodi interface runs at 1080p. #20
• Fixed redundant Dolby Vision HDMI handshakes at playback startup. #21
• Fixed output-surface cleanup when switching to native HDR10, HLG or SDR, including crashes during subsequent interface-resolution changes.
• Improved startup-frame cancellation and GPU-resource cleanup when stopping playback or recreating the renderer.
• Improved audio-engine acknowledgement during HDMI display changes when the audio sink is not yet configured.
• Retained previous Profile 5, 1080p playback, Enhanced stability and Blu-ray ISO Dolby Vision detection fixes.

HDR10-to-Dolby-Vision AI

• Major performance improvements through optimized image analysis, asynchronous scheduling and combined rendering/HDMI packing.
• Fixed startup sequencing that could block the first video output.
• Improved prediction-worker scheduling and queue hand-off.
• Reduced image-analysis overhead using source-plane sampling and deferred statistics/readback.
• Moved future-frame analysis outside the current-frame presentation lock.
• Combined rendering and HDMI packing for compatible Standard-AI output.
• Fixed reuse of failed output preparations after geometry changes.
• The LightGBM model and fallback deadlines remain unchanged.

Controls and diagnostics

• Fixed live presentation counters incorrectly reporting zero. #22
• Added bounded AI fallback diagnostics covering processing stage, status, queue coverage and preparation counters.

Blu-ray 3D playback on AMD

• Added software H.264 MVC decoding and Kodi Blu-ray 3D playback.
• Added paired-eye presentation, eye swapping, mono fallback and native stereo-output selection.
• Preserved authored subtitle-depth information where available.
• Added AMD HDMI 3D signalling for display-advertised modes.
• Kept 3D sources outside CB1, including mono playback: no Dolby Vision conversion, AI processing or FEL upscaling.
• Added malformed-MVC parser checks and recovery from rejected stereo-output transitions.

3D support incorporates work from CinemaOne and popcornmix.

Known issues

• Lower-powered GPUs such as N100/N150 can stutter when displaying the GUI over Dolby Vision playback.
• HDR10-to-Dolby-Vision AI conversion may fall back to native HDR10 when processing cannot keep up.
• Enhanced presets need further tuning for a more noticeable effect.
• AMD HDMI 3D output and retail MVC disc navigation require hardware testing.

Next focuses

• Improve the efficiency of HDR-to-Dolby-Vision and Dolby-Vision-to-HDR conversion pipelines.
• Make the Enhanced rendering modes fully functional.
• Integrate compatibility fixes and address newly reported support issues.

Report issues with the CPU/GPU, display, connection chain, build version and kodi.log.

R1.0.0 Beta2

R1.0.0 Beta2 - Major performance improvements

Changes since Beta1.

Playback and performance

• Improved frame pacing for native Dolby Vision and DV Enhanced, including Profile 7 FEL with subtitles.
• Added optional asynchronous frame preparation, limited to one next frame.
• Reduced redundant GPU processing and repeated Enhanced metadata calculations.
• Improved recovery after seeks, pause/resume and rendering-mode changes.
• Fixed DV frame preparation remaining disabled after an HDR10 AI fallback.

Rendering and controls

• Refined Natural and Signature processing.
• Automatically selects a compatible 2160p Dolby Vision output when the interface runs at 1080p.
• Separate settings for Enhanced Player information and Quick rendering switch.
• O cycles through player information, rendering selection and fullscreen video. Kodi's native information panel is also supported.

Diagnostics

• Added lightweight HDMI and display-route logging, including converter information when available.

Optimizations apply to compatible CB1 rendering paths. Native Kodi and fallback
scheduling remain unchanged.

Downloads

• .img.gz: clean installation on a USB drive or SSD.
• .tar: native LibreELEC update; copy to /storage/.update/ and restart.
• Source archives: matching build sources, dependency downloads and license notices.
  Not needed for installation.

Source builders should extract both source archives into the same directory.
See build instructions.

Keep a backup before updating. Performance depends on hardware and content.

Known issues

• On lower-powered GPUs such as Intel N100, displaying the GUI over Dolby Vision playback can cause stuttering.
• Some 59.94 FPS Dolby Vision sources still drop frames on N100.
• Enhanced presets need further tuning to produce a more noticeable visual effect.
• Profile 5 black-screen reports on some AMD and Intel Xe configurations remain under investigation.
• Newly enabled Intel families and AMD support require hardware testing.

Report issues with the CPU/GPU, display, connection chain, build version and
kodi.log.

R1.0.0 Beta1

R1.0.0 Beta1

Technical

• Kodi 22 RC1 update.
• Repository rebuild with CB1 0.1: Dolby Vision processing is separated from the playback layer through a dedicated API, making it easier to reuse, test and develop independently.

Rendering options for Dolby Vision input

• DV Native (Standard TV-Led): standard Dolby Vision playback, preserving the original metadata and creative intent.
• DV Enhanced: Natural or Signature presets adjust existing Dolby Vision metadata to make better use of the display's peak brightness. Controlled highlight and dynamic-range enhancement preserves black levels and shadow detail.
• HDR10 Basic / Expert: Dolby Vision-to-HDR10 conversion, including FEL reconstruction. Basic uses source-derived information. Expert uses a display profile and supported CM2.9/CM4 creative metadata for dynamic tone mapping into HDR10, including on displays without Dolby Vision support.
• HDR10 Fallback: standard Kodi playback when Dolby Vision support is disabled, using the compatible HDR10 base layer where available.

Rendering options for HDR10 input

• DV Reconstructed (AI): image analysis and a compact, included LightGBM model estimate L1 and L3 Dolby Vision metadata while preserving the HDR10 source pixels.
• DV Enhanced (AI): Natural or Signature presets process the HDR10 source using the display profile and AI scene analysis, extending usable dynamic range while protecting blacks and shadow detail. Output luminance metadata reflects the processed image.
• HDR10 Native: native HDR10 playback without CB1 conversion.

Settings: Player > Videos. Standard Dolby Vision is the default.

Playback controls

• Quick rendering switch: change the available output modes during playback to compare their rendering on the same scene.
• Player information: view the source, active rendering mode, metadata and playback diagnostics. Press O to cycle through Player information, the rendering selector and video only.

Drivers

• Intel: extended support for older iGPU families.
• AMD: initial experimental Dolby Vision HDMI output support for AMD iGPUs.

Downloads

• .img.gz: clean installation on a USB drive or SSD.
• .tar: native LibreELEC update; copy to /storage/.update/ and restart.
• Source archives: matching build sources, dependency downloads and license notices.
  Not needed for installation.

Source builders should extract both source archives into the same directory.
See build instructions.

Keep a backup before updating. Performance depends on hardware and content.

Known issues

• Some frame drops with Profile 7 FEL on a small number of files on N100/N150.
• Newly enabled Intel families and AMD support require hardware testing.
• Enhanced & Reference profile instability on many GPU.

Report issues with the CPU/GPU, display, connection chain, build version and
kodi.log.

Menu update: Compact bottom-right rendering selector, sized to the available modes.

R0.3.0

R0.3.0

Pre-release : Only to test DV to HDR10 conversion engine & New player information

- Convert Dolby Vision to HDR10 output with Profile 7 FEL reconstruction and L1-guided tone mapping

• Three playback options in Kodi > Settings > Player > Videos, available at Basic level:
  • Standard Dolby Vision (TV-Led)
  • Convert Dolby Vision to HDR10 output
  • Disable Dolby Vision support
• Optional Player information panel with pixel format, bit depth, metadata, output details and GPU render usage. SDR and HDR10 information. (press "O" to open the pannel)
• Lightweight automatic playback diagnostics for frame drops, skips and playback transitions.

Standard DV remains the default. Settings apply to the next playback.

HDR10 conversion uses a 10-bit framebuffer.
Conversion uses libplacebo, not Dolby VS10. Creative CM2.9/CM4 trims are not yet applied.

See output modes and validation.

R0.2.1-opt1

R0.2.1a-opt1

• Lighter automatic diagnostics: useful DV and HDMI/kernel details are kept
  in Kodi's normal log, with repeated messages grouped and limited. Global debug
  logging is no longer needed for these details.
• Broader Standard-DV display compatibility: player and driver now share
  v0/v1/v2 capability checks and select the matching HDMI signaling.
• Gentler HDMI recovery: short-lived failures can recover immediately;
  persistent failures are paced without permanently excluding the display.
• More reliable Profile 7 FEL playback: fixes picture-order issues and freezes after seeking in affected files, while preserving the requested playback position.

R0.1.0-rc2-opt1

• Enhanced diagnostic logging to make playback issues easier to investigate.

Opt1 - Lower Dolby Vision GPU load

• Black-bar optimization: skips unnecessary processing outside the active picture. Not limited to FEL—applies to supported DV profiles with active-area metadata. Around 11% lower rendering load in tested letterboxed sections.
• libplacebo optimization: removes redundant filtering work without changing image quality. Not limited to FEL, with around 12% lower rendering load in tested full-frame sections.

Combined: approximately 16% lower rendering load overall, up to 24% in letterboxed sections.

Measured on i7-11390H.

R0.1.0-rc1

Download

Install LibreELEC DV ·

Installation instructions.

Native Dolby Vision in Kodi on compatible Intel HDMI systems, including profile-7 FEL reconstruction and synchronized CM2.9/CM4 metadata. No external player or Dolby proprietary code

Based on LibreELEC 13.0-devel and Kodi 22 Beta 2. Hardware reference: i7-11390H / Iris Xe on a Geekomm mini it11 . Check profiles and hardware and validation limits before installing.

Developers: complete sources, licenses and build information

Download both source part 01 and source part 02. Follow the reassembly and build instructions.

The bundle includes the exact build sources, patches, notices and original build receipt. Notices and the receipt are grouped in corresponding-sources/release-information/. All original source entries are preserved.

GitHub’s automatic Source code ZIP/TAR downloads contain only this patch repository, not the complete LibreELEC build sources.

Independent experimental community build; not an official LibreELEC, Kodi, Dolby or Intel release. Back up before updating. This is the same v0.1.0-rc1: the tag and both binary downloads are unchanged.