The Connectivity Standards Alliance (CSA) just released Matter 1.5.1, arriving months after the major 1.5 update. This minor point release introduces a number of improvements specifically targeting the Matter camera device type, allowing smart cameras to stream more efficiently while adding multi-stream capabilities for both video and audio.
Multi-stream and modern media formats
One of the most significant upgrades in Matter 1.5.1 is native support for multi-stream video and audio delivery. Previously, when multiple users or services needed access to a camera feed, the device often had to establish independent streams for each task. With the new multi-stream capability, a single camera can deliver multiple optimized streams simultaneously.
This allows cameras and Matter ecosystems to efficiently provide different video qualities for specific use cases. For example, a camera can output a HQ stream for local storage, a 720P stream optimized for mobile viewing, and a dedicated stream for AI processing all at once. By handling multiple streams in a single structured session, Matter helps reduce bandwidth overhead and improves overall reliability.
The update also broadens compatibility with modern media formats. Snapshot images can now be sent using the HEIC codec, offering improved efficiency over traditional JPEGs. For recorded videos, the specification now fully supports HLS and DASH streaming uploads with the CMAF Interface-2 profile, enhancing integration with cloud services, according to the press release.
PTZ operation and chime refinements
Updates in this minor release improve the reliability and configuration flexibility of cameras. Revisions to pan‑tilt‑zoom (PTZ) operation allow more precise positioning, including setups where the camera’s “home” position is located at the edge of its rotation range. The release also strengthens validation for recording configurations to prevent invalid setups.
Matter 1.5.1 also refines support for companion devices such as doorbells, chimes, and intercoms. Chimes now allow controllers to request specific sounds rather than relying on a default tone, enabling more creative automation options (such as distinct chimes for different doorbells). Intercom specs have been clarified, adding support for integrated chimes and standardizing behavior.
Ecosystem and hardware availability
As of now, Aqara (Camera G350) and SmartThings are the first to actively support Matter cameras with core features available on their platforms, including streaming, two-way audio, and night vision mode. The firm promised PTZ control and other features are coming soon, which makes a great first impression for the industry.
Home Assistant is also working to support this functionality following the recent migration of its Matter Server to the Matter.js foundation. Homey is another company that has previously announced plans to add Matter Camera and Matter 1.5 spec support.
On the hardware side, the new Xthings Ulticam V2 is right around the corner with Matter capabilities. Built for both residential and professional use, it features universal compatibility with Matter 1.5 and ONVIF to avoid vendor lock-in. The camera offers flexible installation with both PoE and Wi-Fi options, advanced AI with no subscription fees, and free rolling 7-day cloud storage alongside local backup support.
However, for the latest spec 1.5.1, it may still take months to hit the market with proper certification. Companies that contributed to the specification and tested along its development usually receive the first batch of certifications.
(Source: CSA; Image: CSA, Matter Alpha)
