It's the default. You can also call Player.set(ColorSpaceBT709) to set SDR target. Supported by all renderers

On windows it's recommended and confirmed to work perfectly. D3D11/12 renderer is required. https://learn.microsoft.com/en-us/windows/win32/direct3darticles/high-dynamic-range#option-1-use-fp16-pixel-format-and-scrgb-color-space

player.set(ColorSpaceSCRGB);
// render target pixel format MUST be rgba16f

examples:

• glfwplay.exe -colorspace scrgb -d3d11 -c:v MFT:d3d=11,CUDA,FFmpeg,dav1d test.mp4
• glfwplay.exe -colorspace scrgb -d3d12 -c:v MFT:d3d=11,CUDA,FFmpeg,dav1d test.mp4
• qt rhi set environment var QSG_RHI_HDR=scrgb
• OBS Studio Plugin

Player.set(ColorSpaceUnknown) to detect display hdr capability and enabled automatically(on windows gfx context must be created by mdk via updateSurface(). Player.set(ColorSpaceBT2100_PQ) to force hdr metadata passthrough, SDR images will be tone mapped to HDR10 too.

• Metal: MetalRenderAPI.layer must be provided. example code
• D3D11/12
• Vulkan
• EGL

examples:

• glfwplay.exe -d3d11 -c:v MFT:d3d=11,CUDA,FFmpeg,dav1d test.mp4
• glfwplay.exe -colorspace bt2100 -d3d11 -c:v MFT:d3d=11,CUDA,FFmpeg,dav1d test.mp4
• glfwplay.exe -metal -c:v VT,FFmpeg,dav1d test.mp4
• glfwplay.exe -colorspace bt2100 -metal -c:v VT,FFmpeg,dav1d test.mp4
• qt rhi set environment var QSG_RHI_HDR=hdr10

• Profile 5 is supported by all renderers, i.e. OpenGL, D3D11/2, Metal and Vulkan renderer.
• Dolby vision dynamic metadata parsing is supported for all decoders. For FFmpeg software decoder(hevc, av1 etc.) and hwaccels(d3d11va, d3d12va, nvdec, vulkan, vaapi, vdpau etc.), metadata is parsed by FFmpeg. For FFmpeg external decoders(qsv, cuvid, mediacodec, v4l2m2m etc.) and mdk builtin decoders(MFT, CUDA, AMediaCodec, VT etc.), metadata is parsed by mdk.
• Support SDR and HDR10 display

Currently only LLDV is supported, i.e. dolby vision metadata is processed by decoder and renderer, not display.