# Vulkan 1.4.366 adds SMPTE ST 2094-50 HDR support

> **Key takeaway:** The new Vulkan 1.4.366 update introduces the VK_GOOGLE_hdr_SMPTE_ST_2094_50_metadata extension for dynamic HDR metadata support.

**Published:** 2026-10-23T11:45:54+00:00 
**Source:** Phoronix Benchmarks & Drivers 
**Category:** kernel-os 
**Canonical URL:** https://fosswire.org/news/vulkan-14366-adds-smpte-st-2094-50-hdr-support.html 

## Summary
Vulkan 1.4.366 has been released, containing specification fixes, clarifications, and a new API extension. The update introduces support for the SMPTE ST 2094-50 standard via a new Google-led extension, aimed at improving HDR video experiences by managing brightness spikes and mixing SDR and HDR content.

## Technical details of Vulkan 1.4.366
- Introduces the **VK_GOOGLE_hdr_SMPTE_ST_2094_50_metadata** extension.
- Adds support for **SMPTE ST 2094-50** dynamic metadata within the Vulkan swapchain.
- Designed to handle inconsistencies when mixing SDR and HDR content.
- Includes various specification fixes and clarifications from the previous two weeks.

## Why it matters
This extension helps improve HDR video playback in software like Chrome, following the finalization of the SMPTE ST 2094-50 standard.