OBS Studio 27 Release Notes

June 1st, 2021

Releases

OBS Studio 27.2.4

Fixed a bug where sources could show up in the mixer while using studio mode even when those sources weren’t active [cg2121]
Fixed a bug where audio wouldn’t capture for people with older Windows versions [rcdrone]
Fixed an incorrectly colored icon on the Rachni theme [Monsteer]

OBS Studio 27.2.3

Fixed a bug where the virtual camera on Windows wouldn't display properly [Lain]

OBS Studio 27.2.2

Fixed a bug where the preview would freeze, and the stream could disconnect [rcdrone/Lain]
Fixed a random crash that could happen on shutdown when using scripts [Lain]
Fixed a crash that could happen in Firefox/Chrome when using the virtual camera on Windows [Lain]
Fixed a crash on startup related to audio capture on Windows [R1CH]
Fixed compilation on FreeBSD [obiwac]
Fixed an issue where menu options in the Edit menu (like "Reset Transform") would be wrongly grayed out, also causing certain shortcuts to fail [gxalpha]
Fixed .cube LUT files not working on macOS/Linux with certain non-english languages [rcdrone]
Fixed an issue where FFmpeg dependencies would still be breaking third-party plugins on macOS [RytoEX]

OBS Studio 27.2.1

Fixed an issue that triggered a full system freeze for some users. Made a legendary workaround to some sort of driver/kernel bug which was triggered by the browser source (I am really proud of this) [Lain]
Improved performance of the updated Chromium build of browser source (I am also really proud of this) [Lain]
Fixed an issue where some users with certain older Windows versions would not be able to stream at a very high bitrate [R1CH]
Fixed an issue where some cameras wouldn’t decode correctly on Linux [kkartaltepe]
Fixed an issue where common in-program shortcuts stopped working sometimes (such as Ctrl-F to make a source fit to screen) [gxalpha/WizardCM]
Fixed a bug on Windows 8.1 where desktop audio capture stopped working [WizardCM]
Fixed SRT and RIST from crashing OBS when a URL isn’t set or when disabling a Media source with a RIST URL [pkv]
Fixed a memory leak in PipeWire capture on Linux [fzwoch]
Fixed an issue where the resize grip would break if you dragged it all the way to the top in the filters window [WizardCM]
Updated AOM/SVT encoders again because there seems to be some new good changes [Lain]
Hiding OBS from capture is now logged [WizardCM]
Fixed an issue on macOS where FFmpeg dependency filenames were unnecessarily complex, breaking some third party plugins [PatTheMav]
Fixed browser plugin not loading if OBS launched from certain paths on macOS [derrod]

OBS Studio 27.2

New Features and Additions

Added AJA source for AJA devices [DDRBoxman/AJA Team]
Added AJA output to tools menu for AJA devices [DDRBoxman/AJA Team]
Updated CEF (Chromium) for the browser source from 75 (3770) to version 95 (4638) (Absolutely amazing work by everyone who worked on this, especially the CEF community -Lain) [PatTheMav/RytoEX/pkv/WizardCM/VodBox]
Added the ability to set different blend modes to sources via the source right-click context menu (similar to Photoshop’s layer blending for example) [jw0z96]
Added AOM AV1 and SVT-AV1 encoders (note that these are currently considered experimental, work best with CPUs that have many cores, and are only accessible for recording in advanced output mode) [Lain]
Added an OBS hotkey for browser sources to allow refreshing a browser source via that hotkey [gxalpha]
Added hotkey filter search [furious]
Added hotkey duplicate detection [furious/Lain]
Added a warning dialog when switching profiles that have settings changes that require a restart [offthegrid-mike]
Added a “Show active outputs warning on exit” option in advanced settings, which allows you to enable/disable the confirmation dialog on exit while recording/streaming [bobvandevijver]
Added support for the RIST protocol [pkv]
Added official Flatpak support for Linux [GeorgesStavracas]
Added framework for future support of background hotkeys on Wayland [kkartaltepe]
Added an option to general settings to hide OBS from all capturing, allowing you to capture your screen without OBS showing up [R1CH]

General Changes

Updated dependencies to their latest versions [Lain/RytoEX/pkv/WizardCM/VodBox]
Volume meters will now show audio activity in grayscale when muted rather than showing no activity [cg2121]
Improve menu bar icons on macOS [PatTheMav]
A warning will now be shown when failing to start/stop YouTube streams [derrod]
Improved consistency of transition duration suffixes [cg2121]
On Linux, the list of windows shown in Window capture will now show alphabetically [donotnoot]
Twitch panels will now use light or dark mode depending on the OBS theme [RytoEX]
Changed the Docks menu from being a submenu in the View menu to instead be its own top-level menu on the menu-bar [Warchamp7]
A more user-friendly dialog is now displayed when a file could not be written for recording [R1CH]
The filters preview/properties are now resizable [Warchamp7]
Added the ability for RTMP servers to request a silent reconnect when the server is going down (otherwise known as the “RTMP go away” feature) [Lain]
Incompatible audio filters will now not be shown for sources that don’t support them [WizardCM]
Added frontend event so scripts can know when OBS is shutting down [cg2121]
PipeWire capturing is now more robust, especially in multi-GPU setups [columbarius]
Sources will now be activated when viewing them in the filters dialog [tt2468]
Browser sources are no longer refreshed when their size changes (useful when programmatically resizing them) [exeldro]

Bug Fixes

Fixed the cursor capture position on certain applications with window and game capture [rcdrone]
Fix YouTube GoLive feature not working for existing broadcasts that are not auto-start broadcasts [derrod]
Fixed the YouTube broadcast button state when stopping streams without auto-start, that have auto-stop enabled [derrod]
Fixed an issue where the edit menu wouldn’t properly update its state depending on what was selected [offthegrid-mike]
Fixed the Paste Source context menu items from still being enabled if source has been destroyed [Lain]
Fixed a bug where pressing “Cancel” on a properties dialog would cause settings to save in some cases despite hitting cancel [gxalpha]
Fixed a bug where certain settings would show as available in the video capture device properties when they weren’t actually available [lexi-lambda]
Fixed a crash where modifying the video capture device properties on Linux could cause a crash on some systems [lexi-lambda]
Fixed Linux PulseAudio monitoring volume with signed 32bit and unsigned 8bit formats [norihiro]
Fixed Media Source not working with audio-only files [norihiro]
Fixed a couple memory leaks with QSV [shleeable]
Fixed an issue where audio monitoring could have significant latency on Linux [kkartaltepe]
Fixed undo/redo not working for text changes on the context bar [gxalpha]
Fixed an issue where the transform window would not consistently updated for selected sources/scenes [offthegrid-mike]
Fixed missing undo/redo action when resetting filter properties [gxalpha]
Fixed missing undo/redo action when using “Add existing source” [gxalpha]
Fixed an issue where stinger transitions could sometimes loop unintentionally [exeldro]
Fixed an issue where transforms/crops would not be included when copying/pasting sources [torresam]
Fixed a couple potential freezes and crashes, especially with browser sources [Lain]
Fixed an issue where devices would not always reinitialize properly when switching scene collections [Lain]
Fixed various issues that would affect the websockets plugin [tt2468]
Fixed a bug where certain Twitch panel settings wouldn’t save properly [derrod]
Fixed a bug on Linux where Window capture wouldn’t properly capture on software rasterization devices [ishitatsuyuki]
Fixed various potential bugs and race conditions across the program and multiple plugins [wangshaohui]
Fixed network throughput to distant servers potentially being limited in low memory environments [R1CH]
Fixed a crash on Linux X11 that could happen when closing certain dialogs containing video previews [tt2468]
Fixed VST plugin windows disappearing when resized [Blue Cat Audio]
Fixed a VST plugin crash that could occur under certain circumstances [walker-WSH]
Fixed an incorrect offset of scene labels on certain multiview configurations [norihiro]
Fixed a bug that would allow resizing sources that are locked [ntoff]
Fixed a performance issue with X11 window capture on Linux [ishitatsuyuki]
Fixed a bug where projectors could not be resized with certain window managers on Linux [univrsal]
Fixed window flashing on macOS when starting the program minimized to tray [CodyJung]
Fixed a bug where push-to-talk or mute delay would not save under certain circumstances [CodyJung]
Fixed a bug where mouse hotkeys would not always function correctly on Linux [kkartaltepe]

OBS Studio 27.1.3

Fixed a bug introduced in 27.1.2 where some sources wouldn't have their audio output properly [Lain]

OBS Studio 27.1.2

Fixed Browser Source transparency issue [rcdrone]
Fixed an issue where the main window could not be resized for smaller monitors [Warchamp7]
Fixed hotkeys failing sometimes when the program was in focus [RytoEX]
Fixed an issue where the Bandwidth Test checkbox for Twitch would be incorrectly disabled [derrod]
Fixed an issue where the Bandwidth Test was unavailable for YouTube in the Auto Configuration wizard [derrod]
Fixed a crash when opening the Auto Configuration dialog with a linked YouTube account [notr1ch]

OBS Studio 27.1.1

Fixed an issue that caused an incorrect deployment of 27.1 on Windows, causing the Display Capture Source to look washed out [Lain]

OBS Studio 27.1

New Features and Additions

Added YouTube integration [yuriy-chumak]
- Allows the ability to connect your YouTube account without using a stream key
- Adds various features when setting up your stream that allows you to set settings for each stream: your stream title, description, privacy settings, scheduling streams, and more
- YouTube streams are created and managed via a new “Manage Broadcast” button next to “Start Streaming” [derrod]
- Also features a chat dock for public and unlisted broadcasts (currently read-only) [derrod]
- Bandwidth testing is now supported in the Auto-Configuration wizard when logged in [derrod]
- Special thanks to the developers at YouTube for working with us directly on the initial implementation of this feature and helping to make it a reality
Added an 18-scene multiview option [XDelta]
Added a “Mask Only” option to the stinger track matte [Lain]
Added a feature to browser sources to allow limited control over OBS, which must be explicitly granted by the user [gxalpha]
- For more details, see the documentation here: https://github.com/obsproject/obs-browser#control-obs
Added an option to draw safe areas in the preview (same as the safe areas in the multiview) [cg2121]

General Changes

Added performance fixes for Windows 11 and Windows 10 Insider builds [rcdrone]
Names for displays on macOS Display capture are now human readable names [Developer-Ecosystem-Engineering]
Auto-Remux now works with Replay Buffer [gxalpha]
Optimized the media source, reducing unnecessary CPU usage [rcdrone]
The missing files dialog will now detect missing files for stingers as well [gxalpha]
Remove “Enter Fullscreen” from the menu on macOS because macOS already has a builtin fullscreen mode interface option [gxalpha]
Sources that are invisible/hidden will now have their text dimmed as well in the source list [gxalpha]
Added a “Missing Files Check” menu item to the “Scene Collections” menu [gxalpha]
Added source icons to the source toolbar [cg2121]
Image sources that use gif files now will animate in preview when using studio mode [cg2121]
Enabled Alpha option in the Freetype 2 Test Source’s Font dialog [norihiro]
Added the ability to disable the Missing Files dialog using a startup flag [tt2468]
Added Ctrl+R on Linux and Cmd+R on macOS to reload browser panels [WizardCM]
Re-enabled drag & drop for scenes & sources on Linux [GeorgeStavracas]
Minor UI improvements to various areas, including Source Toolbar, Transform dialog and more [Warchamp7]
Improved internal behaviour in the game capture source to avoid unnecessary re-hooking [rcdrone]
Wayland capture sources are now available without having to pass custom parameters to OBS from the command line [tytan652]

Bug Fixes

Fixed a bug on Wayland on Linux where the cursor would capture slightly mispositioned [GeorgeStavracas]
Fixed a bug with Dynamic Bitrate that would cause it to malfunction when used with hardware encoders [R1CH]
Fixed a bug on Wayland where capture methods (ie window/desktop) that weren’t fully supported would appear anyway [GeorgeStavracas]
Fixed a variety of colour-related bugs in window capture and browser source [rcdrone]
Fixed a bug where track matte stingers would flash previous frames sometimes [Lain]
Fixed an issue where the projectors would list incorrect resolutions for DPI-scaled monitors [RytoEX]
Fixed a crash on exit that could occur when using 3rd party plugins that hold references to sources with audio monitoring enabled [R1CH]
Fixed a bug where the Game Capture source would occasionally still capture overlays with the “Capture third-party overlays” option disabled [kokole]
Fixed a bug where keyboard interaction did not work correctly on macOS [WizardCM]
Fixed a bug where the replay buffer could crash when plugins interact with it [exeldro]
Fixed an issue where the mask/blend filter looked incorrect on version 27 [rcdrone]
Fixed a bug where deleting a scene that’s used as a source wouldn’t Undo/Redo properly [exeldro]
Fixed a bug where the Auto-Remux would pop up blank sometimes [gxalpha]
Fixed a bug where performing a redo for creating sources would cause sources to be created in the wrong scene [gxalpha]
Fixed the “Deactivate when not showing” option in the Decklink source not working properly [cg2121]
Fixed a bug where themes were unable to use previously defined palette variables [WizardCM]
Fixed log viewer taking up unnecessary extra memory when closed [cg2121]
Fixed a crash that could occur when exiting OBS with decklink output active [R1CH]
Fixed an issue where saving screenshots or the replay buffer would fail if the output filename format contained a directory path [R1CH]
Fixed a crash that could occur when a connection was dropped during the Auto-Configuration Wizard’s bandwidth-testing stage [derrod]
Disabled "Network Optimizations" when using RTMPS because of incompatibility [R1CH]
Fixed an issue where setting a zero second auto reconnect delay would cause OBS to stop responding if disconnected [R1CH]

OBS Studio 27.0.1

Fixed 16bpp PNGs rendering brighter than version 26 [jpark37]
Fixed blue chroma key value not keying correctly [jpark37]
Fixed a bug where various sources, including game capture, would get stuck on a black screen sometimes [Lain]
Fixed a context bar crash introduced by a 27.0 change [Lain]
Fixed a bug where you could generate invalid undo/redo actions by clicking “Move Up” or “Move down” without having any source selected [WizardCM]
Fixed an issue where Psycho Visual Tuning would cause NVENC to fail to load when enabled for certain devices. Instead, they will now load without it if it’s unavailable [jpark37]
Fixed various settings (like lossless) for NVENC that could cause load failure [jpark37]
Fixed a bug where “Delete Scene” undo/redo action was not being translated [WizardCM]
Fixed filter changes not generating undo/redo actions [Programatic]
Fixed an issue that could result in lag for people dragging and dropping sources to reorder [exeldro]
Fixed a case on macOS where the VideoToolbox encoder would cause an encoder error when upgrading from 26 to 27.0 [RytoEX]
Audio sources and scenes without filters will no longer have the “Copy Filters” option enabled [RytoEX]
Added “Apply alpha in linear space” option to the media source which treats alpha as linear rather than non-linear (basically if you don’t know what that means, leave it alone) [jpark37]

OBS Studio 27.0

New Features

Added Undo/Redo [Programatic/Lain]
Added a new capture method for Display Capture, allowing the ability to capture displays cross-GPU. This fixes the black screen issues on laptops in particular (Requires Windows 10, 1903 or newer) [jpark37]
- For users who have previously switched the “default” GPU to the integrated GPU, it is recommended to remove the override and instead use the new toggle in the Display Capture source
Added a missing files warning when loading scene collections [VodBox]
- Also allows for bulk-update when folders have been moved (such as between computers)
- Third party plugins will need to add support for this capability manually
Added source visibility transitions, which allow you to set a transition for a source when showing or hiding it [exeldro]
Added service integration and browser dock support to macOS and Linux [tbodt, cg2121]
Added support for Wayland on Linux. This includes a new PipeWire capture source when using Wayland (for Ubuntu users, 20.10 or newer is required for PipeWire capture) [GeorgeStavracas]
(Windows only) Added support for NVIDIA Noise Removal in the Noise Suppression filter (requires the NVIDIA Audio Effects SDK and a compatible GPU) [pkviet]
Added a Track Matte mode to stinger transitions, which supports a scene mask to display parts of the previous & current scene at the same time [Palakis]
Added support for SRGB texture formats, applying color operations in linear space [jpark37]

General Changes

When saving a file, the saved file path will be shown in the status bar [cg2121]
Media Sources & Stingers now support hardware decoding on macOS [eric]
Added an interact button to the source toolbar for the browser source [cg2121]
You can now refresh a browser dock in the right-click context menu [WizardCM]
Re-enabled Python scripting support on macOS by adding support for Python 3.8 and above [PatTheMav]
Added presets for 1080p and 4K in the macOS Video Capture Device source [vangdfang]
Added a virtual camera toggle to the system tray menu [cg2121]
Automatic rotation on Video Capture Devices can now be manually disabled [drewler]
Added launch parameter to disable high-DPI scaling (--disable-high-dpi-scaling) [Lordmau5]
Added Edit Script button to the script dialog [exeldro]
Added auto reset option to v4l2 source to handle dropouts with certain devices [esden]
Added frontend API functions for the virtual camera, value of the t-bar, and to reset video [cg2121, cpyarger, tt2468]
Improved startup time on Windows by not attempting to load plugin dependencies as OBS plugins [R1CH]
Improved performance when capturing OpenGL games with Game Capture on Windows [jpark37]
The transitions menu will now be disabled when currently in the middle of a transition [cg2121]

Bug Fixes

Fixed an issue when importing a Scene Collection that has special characters, causing the import to silently fail [RytoEX]
Fixed a bug where DX12 games on Windows would capture game frames out-of-order [jpark37]
Fixed an issue where Media Source wouldn’t reconnect to remote streams [MegLi619]
Fixed an issue that would cause silent audio across all sources when a media source reaches max buffering [marcan]
Fixed VirtualCam crashing clients when using a custom placeholder image [R1CH]
Fixed VST paths on Linux [tytan652]
Fixed an issue with on High-DPI displays where the Canvas Resolution would be set to the scaled resolution in Settings and Auto-Config [Nirusu]
Fixed an issue where Video Settings would not be saved when using “Resize output (source size)” [WizardCM]
Fixed a crash with Window Capture on Windows that could occur if the window was destroyed [jpark37]
Fixed an issue where resizing sources within groups would not correctly resize the group [WizardCM]
Fixed an issue where drag and drop would require ignore uppercase file extensions [bershanskiy]
Fixed an issue with key modifiers in the Interact dialog for browser sources on Windows [Scrxtchy]
Fixed a crash on macOS when updating, caused by VirtualCam signature changes [PatTheMav]
Fixed a hang when attempting to reconnect to an RTMP server while streaming [Thulinma]
Fixed a crash that would happen on Linux when audio backends are disabled [Chiitoo]
Fixed bframes=0 not working with QSV encoder [Lin]
Fixed a potential deadlock when dragging sources to reorder [wangshaohui1314]
Fixed Window Capture on Windows being stuck on the last frame when a window no longer exists [wangshaohui1314]
Fixed a crash related to changing the “Capture Cursor” [jpark37]
Fixed a scene collections not importing correctly from other operating systems [RytoEX]
Fixed a minor performance bug with the decklink output [cg2121]