OBS 30.1 and 30.2 shipped alpha and multitrack features in 2024

The setup

OBS Studio ships numbered releases through GitHub, and each release page is the OBS Project's own changelog rather than a summary written by someone else. Version 30.0 shipped in November 2023 and added WHIP/WebRTC output; the two releases that followed in 2024, version 30.1 on 12 March and version 30.2 on 12 July, are dated software milestones distinct from the general knowledge-base pages that describe OBS as a living tool. This entry is about those two dated releases, not the wiki.

What the documents show

The 30.1 release notes list a 'Premultiplied Alpha option for game capture on Windows' and 'GPU rescaling options for streaming and recording outputs' among its new features. Premultiplied alpha changes how a source's transparent edges blend against what is behind it, which matters directly for anyone capturing a Live2D or VRM viewer window that renders against a transparent or green background before compositing it into a scene. The 30.2 notes, four months later, add 'Multitrack Video streaming,' which the release identifies as the feature Twitch calls Enhanced Broadcasting, plus 'Enhanced RTMP/FLV multi-track audio and video' output. The two releases document different problems: 30.1 is about how a single capture renders, 30.2 is about how OBS delivers multiple encoded outputs to a service.

The craft

A performer troubleshooting a hard-edged or fringed outline around a rigged model has, as of 30.1, a documented setting to try rather than a workaround from a forum thread: enabling premultiplied alpha on the capture source. Multitrack Video, meanwhile, is a Windows-only feature that the 30.2 notes say requires specific NVIDIA or AMD GPU generations and, when enabled, sends system information to the streaming service at the start of a stream. A creator deciding whether to turn it on is trading some system disclosure for the ability to offer viewers multiple quality tracks without running a second encode themselves.

Keeping the creator in control

Reading the dated release notes rather than a general 'what's new in OBS' summary lets a creator match a specific fix to a specific version, which matters when troubleshooting an issue that only appeared after an update. The 30.2 notes are explicit about what Multitrack Video transmits about a creator's hardware and settings; naming that disclosure plainly, rather than treating it as a hidden cost of a convenience feature, is what keeps the choice to enable it informed rather than automatic.

• Does a rendering artifact around the avatar predate or postdate the OBS version currently installed?
• Is the GPU and operating system combination actually eligible for Multitrack Video before enabling it?
• Which system details are shared with a streaming service under Multitrack Video, and is that acceptable for this setup?

Version numbers are not marketing; they are the boundary between what one build of OBS can do and what an older or newer build cannot. Citing the 30.1 and 30.2 notes directly, rather than a rounded-up claim that OBS added real-time features in 2024, keeps the description checkable against the same changelog anyone else can open.