fix dropping UDP packets during connection close (#6278) UDP packets were dropped in case of errors regardless of their size. Now they are dropped only if they are empty and there's an error.
docs: fix youtube rtmps URL (#6286) The rtmps URL for Youtube was wrong. The fingerprint is not required anymore.
prevent free access to playback server in case of legacy credentials (#6311) When legacy credentials are in use (readUser, readPass, publishUser, publishPass), access to the playback server is granted to anyone. Prevent this by granting access only to users using readUser, readPass.
auth: skip JWKS fetch when no JWT is provided (#6274) authenticateJWT fetched the JWKS before checking whether the request carried a token at all. Every anonymous request, such as the first unauthenticatedRTSP DESCRIBE or HLS request that precedes a 401, caused an outbound request to the JWKS server while holding the manager's write lock. An unauthenticated client could therefore make the server contact the identity provider at will and, while that endpoint was slow or unreachable, stall JWT authentication for everybody. Return "JWT not provided" before touching the JWKS. Also check the JWKS response status code. A non-2xx reply was fed straight to the JSON decoder, so an error page surfaced as a confusing parse error,and an error reply that happened to hold valid JSON was cached as the key set for an hour. Reject it with the status code, as authenticateHTTP already does. Behavior for requests that carry a token against a healthy JWKS server is unchanged.
rewindablereader: fix possible OOM (bluenviron/mediacommon#383) empty datagram packets might cause the allocation of unnecessary entries. Fix that.
h264: revert bluenviron/mediacommon#142 (bluenviron/mediacommon#384) supporting standalone SEI units should not be necessary anymore since these are filtered out at the root (bluenviron/gortsplib#1184). In case of any issue that should arise after this change, open a bug report and we'll adjust things accordingly.
h264: support SEI recovery point in DTS extractor (bluenviron/mediacommon#341) Treat a SEI recovery point message (payload type 6) as a random access point, similarly to a CRA in H265, so the DTS extractor can (re)initialize its state from the first coded frame that follows the recovery point.
API
fix race condition when kicking RTSP sessions (#6260) (#6275)
do not change passwords when their value is "" (#6141) (https://github.com/bluenviron/mediamtx/issues/6287) (#6292) some users call /config/global/get and passits content to /config/global/patch. Since the former now redacts passwords and replaces their value with "", this string is used as an effective password, breaking authentication. Now password values equal to "" are ignored by /config/global/patch, and the original password value is kept unchanged.
fix deadlock when reloading the API (#6280) (#6279) (#6310) When the API is closing, a /config endpoint might be waiting on the server to reply, but the server is busy waiting on all API endpoints to return, causing a deadlock. Fix this by canceling requests from API endpoints to the server when the API is closing.
Media-Over-QUIC
use "catalog" as catalog track name (#6268) Previously, the catalog track name was ".catalog" which is non-standard.
apply path-level rtspUDPReadBufferSize to the first connection (#6291) The RTSP static source built its client before reading the path-level rtspUDPReadBufferSize, so the value only reached the client after a reconnection. Compute it before creating the client, as the MPEG-TS and RTP sources do and as this source did before #5488.
drop standalone H264/H265 trailing SEIs (bluenviron/gortsplib#1184) #3614bluenviron/mediacommon#142#6257bluenviron/mediacommon#382 H264/H265 access units containing a single SEI only, trailing other units, generated by someTP-Link/Tapo cameras, are non-standard and cause several issues in downstream components, including the DTS extractor and the recorder. Previously, the H265 DTS extractor was adjusted to support such units (bluenviron/gortsplib#142) but the problem represented itself with H265. Filter these units out at the root.
complete RTP/JPEG implementation (bluenviron/gortsplib#1187) add support for restart headers, limit support to JPEG types 0 and 1.
RTMP
detect read errors even when the server is writing (#6267) Until now we relied exclusively on write errors to detect broken RTMP connections. Now read errors are checked too.
writer: drain inbound messages (#5776) (bluenviron/gortmplib#132) Some servers periodically send messages even when we're publishing. If they are not read, they fill an internal connectionbuffer and cause periodic disconnections. Now the Writer also drains inbound messages.
reader: support FLV video command frames and skip empty audio messages (bluenviron/gortmplib#128) Someservers (e.g. Wowza Streaming Engine) send a video info/command frame before the first frame: a 2-byte message with frame type 5 and a single command byte (start of seek / end of seek). Video.unmarshal rejected it on length, aborting the whole connection. Add Video.FrameType (key frame, inter frame, command) and Video.Command, deprecate Video.IsKeyFrame in favour of FrameType, and skip command frames in Reader since they carry no data. Some servers (e.g. Wowza Streaming Engine) send an audio message with an empty bodybefore the first frame. allocateMessage rejected it with "not enough bytes", aborting the whole connection. Parse an empty body into an Audio with Codec = 0 and no other field, marshal it back to an empty body, and skip such messages in Reader since they carry no data, like FFmpeg does.
rename message.Video.Type into message.Video.PacketType (bluenviron/gortmplib#138) This is to avoid confusion with the new message.Video.FrameType field.
HLS
muxer: keep EXT-X-MAP in delta updates (bluenviron/gohlslib#397) Delta updates were generated without EXT-X-MAP, although all tags that are not skipped must remain in them. Apple clients stop playback (MoofManifold -16046) at the first delta update that skips a segment after delta updates without skipped segments.
WebRTC
fix panic with specially-crafted WHEP requests (#6301) (#6309) this happened in case of WHEP requests with no media descriptions in the SDP.
Dependencies
Go updated from 1.26 to 1.27
code.cloudfoundry.org/bytefmt updated from v0.90.0 to v0.92.0
github.com/bluenviron/gohlslib/v2 updated from v2.4.5 to v2.4.6
github.com/bluenviron/gortmplib updated from v1.0.3 to v1.0.4
github.com/bluenviron/gortsplib/v5 updated from v5.6.6 to v5.6.7
github.com/bluenviron/mediacommon/v2 updated from v2.9.5 to v2.9.6
github.com/datarhei/gosrt updated from v0.11.1-0.20260812091715-a77b40bb4b76 to v0.12.0
github.com/gin-contrib/pprof updated from v1.5.5 to v1.5.6
github.com/go-git/go-billy/v5 updated from v5.9.1 to v5.9.2
github.com/go-git/go-git/v5 updated from v5.19.2 to v5.19.3
github.com/pion/ice/v4 updated from v4.4.2 to v4.4.5
github.com/pion/interceptor updated from v0.1.48 to v0.1.49
github.com/pion/rtcp updated from v1.2.17 to v1.2.19
github.com/pion/transport/v4 removed
github.com/pion/webrtc/v4 updated from v4.2.20 to v4.2.22
github.com/quic-go/quic-go updated from v0.62.0 to v0.63.0
github.com/pion/datachannel updated from v1.6.2 to v1.6.3
github.com/pion/dtls/v3 updated from v3.1.8 to v3.1.9
github.com/pion/mdns/v2 updated from v2.2.0 to v2.2.2
github.com/pion/sctp updated from v1.11.1 to v1.11.3
github.com/pion/srtp/v3 updated from v3.0.15 to v3.1.3
github.com/pion/stun/v4 updated from v4.0.0 to v4.0.1
github.com/pion/turn/v5 updated from v5.1.0 to v5.1.2
github.com/pjbgf/sha1cd updated from v0.6.0 to v0.7.0
github.com/pion/transport/v5 v5.1.1 added
Security
Binaries are compiled from source code by the Release workflow, which is a fully-visible process that prevents any change or external interference in produced artifacts.
Checksums of binaries are also published in a public blockchain by using GitHub Attestations, and they can be verified by running:
ls mediamtx_* | xargs -L1 gh attestation verify --repo bluenviron/mediamtx
You can verify checksums of binaries by downloading checksums.sha256 and running:
Fixed audio monitoring on browser sources briefly being enabled every time in Beta 1-6 [prgmitchell] (#14003)
Fixed browser sources appearing blank on refresh in Beta 1-6 [WizardCM] (#14003)
Fixed local network requests failing in browser sources in Beta 1-6 [WizardCM] (#14009)
Fixed Plugin Manager showing third-party plugins as missing when OBS is launched in Safe Mode in Beta 1-6 [Warchamp7] (#14001)
Fixed Plugin Manager removal button sometimes not removing missing plugins from the Plugin Manager in Beta 1-6 [Warchamp7] (#14008)
Fixed the Missing Encoders popup not showing in taskbar [Warchamp7] (#14010)
Fixed profile import failing on paths with a trailing slash [Ushkalovk] (#13863)
Developer Info: Added obs_canvas_video_active() to check if the video of a canvas is active [exeldro] (#13110)
Developer Info: Changed obs_canvas_reset_video() to allow resetting a canvas's video when any other canvas's video is active, but not its own video [exeldro] (#13110)
Beta 6 Changes
Fixed a crash during certain actions involving groups in Beta 1-5 [prgmitchell] (#13978)
Fixed scripting not working on macOS in Beta 1-5 [PatTheMav] (#13976)
Fixed game capture hooks not updating in Beta 1-5 [Warchamp7] (#13968)
Fixed clock Lua script not working in Beta 1-5 [RytoEX] (#13974)
Changed Safe Mode to not start WebSocket Server [FiniteSingularity/RytoEX] (#13984)
Removed support for FFmpeg 6.x and 7.x [RytoEX] (#13964)
Fixed duplicate "Save Replay" hotkey entries when switching profiles in Beta 1-4 [xtfo] (#13943)
Fixed warning dialogs on macOS not rendering rich text in Beta 1-4 [Warchamp7] (#13949)
Fixed source icon state appearing inverted in Beta 1-4 [Warchamp7] (#13953)
Fixed audio monitoring settings not saving in Beta 1-4 [Warchamp7] (#13951)
Fixed missing encoder check showing missing encoders in an output mode that is not currently selected in Beta 1-4 [Warchamp7] (#13950)
Fixed Windows updater not updating game capture and virtual camera in some cases in Beta 1-4 [Warchamp7] (#13939)
Beta 4 Changes
Fixed a CI and packaging issue. There are no application changes since Beta 1.
Beta 3 Changes
Fixed a CI issue. There are no application changes since Beta 1.
Beta 2 Changes
Fixed a versioning issue. There are no application changes since Beta 1.
33.0 New Features
Updated CEF from 127/6533 to 150/7871 [WizardCM] (#13900)
This is a massive update to the underlying framework used for browser sources and docks from the July 2024 release to September 2026
All of this work is on the backend and should be invisible to users. Please be sure to report any new weirdness or problems you run into with browser sources!
Complete overhaul to plugin loading [FiniteSingularity/PatTheMav] (#13594)
First-party plugins are now in a new folder named core
Third-party plugins have an updated installation location and folder structure
Existing third-party plugins will continue to load from the legacy locations until OBS Studio 34.0
Added a startup error if obs-transitions failed to load [notr1ch] (#13321)
Improved file splitting for Hybrid MP4/MOV [derrod] (#13386)
Fixed outputs getting stuck running when a bad rescale output resolution is set [suogesi] (#13375)
Fixed monitoring icon state getting desynced when using third-party tools or websockets [prgmitchell] (#13822)
Fixed potential crash when shader cache file is invalid [notr1ch] (#13538)
Fixed a potential crash on Linux when USB mic is removed [R0te/RytoEX] (#13922)
Fixed a potential crash when renaming a source with the Add Source window open [Warchamp7] (#13800)
Fixed a potential deadlock during video/audio tasks [exeldro] (#13579)
Fixed an issue with B-frame offset calculation in AMF that could cause streams to disconnect [lexano-ivs] (#13762)
Fixed PipeWire screencast sources being duplicated in studio mode [tytan652] (#13673)
Fixed a potential crash when switching off a newly created profile [Warchamp7] (#13182)
Fixed a source toolbar crash when source type is missing [Penwy] (#13539)
33.0 Developer Information
Added frontend event and output signal for replay buffer saving [Penwy] (#8955)
Added guidance regarding the theme system to the top of all theme files [Warchamp7] (#13733)
Added ability to set a file extension filter for OBS_PATH_FILE_SAVE path types [FiniteSingularity] (#10190)
Added obs_frontend_is_safe_mode for first-party plugins
Third-party plugins are not loaded at all in Safe Mode
Added versions to Flatpak plugin extension point [tytan652] (#13735)
Added obs_canvas_video_active() to check if the video of a canvas is active [exeldro] (#13110)
The minimum supported versions of Visual Studio, Windows SDK, and clang-format have been increased. Previous versions may continue to work, but will no longer be tested/supported. It is recommended that build environments are kept up-to-date with the project's toolchain.
Changed Windows builds to use Visual Studio 2026 and SDK 26100 [RytoEX] (#13543)
Changed clang-format version used to 22.1.3 [PatTheMav] (#13549)
Changed obs_canvas_reset_video() to allow resetting a canvas's video when any other canvas's video is active, but not its own video [exeldro] (#13110)
🛑 macOS Apple Silicon (arm64): this build is broken — use v0.21.1
The macOS arm64 assets below crash immediately on launch with EXC_BAD_ACCESS (Code Signature Invalid). A newly added Electron fuse rewrote the Electron Framework binary, which invalidated its ad-hoc signature, and the build was not re-signed afterwards.
Two ways to get a working app:
Download v0.21.1 (recommended) — it ships the fix.
Repair this build in place — after installing, run:
Fixed TFA enforcement to use effective permissions (#28176)
Policies with an IP allow list are now accounted for when enforcing TFA within the allowed range.
Improved license handling so a failed license request keeps the current license in effect and is retried by a scheduled license check, with a warning in the app showing why the license could not be renewed and when it lapses (#28331)
The /server/license response no longer includes downgrade_reason. Read invalid_reason instead, which also reports why a license that is still in effect could not be renewed.
@directus/errors no longer exports LicenseManagedByEnvError, LicenseOfflineUnsupportedError, LicenseResolveIncompleteError or LicenseServiceUnavailableError, or their error codes. License request failures now surface as LICENSE_INVALID with a failure extension, or as the standard FORBIDDEN, INVALID_PAYLOAD, REQUESTS_EXCEEDED and SERVICE_UNAVAILABLE errors.
Removed the ip-matching dependency (#28243)
Policy ip_access and IMPORT_IP_DENY_LIST values are now more strictly validated. Subnets with a malformed prefix such as 10.0.0.0/ 24 or 10.0.0.0/+24, are no longer accepted.
Existing policies that already store such a value will fail every request for users with that policy.
Fixed requests failing after a process was stopped during schema building (#28316) CACHE_SCHEMA_MAX_ITERATIONS has been removed. CACHE_SCHEMA_SYNC_TIMEOUT now also limits the schema build itself and defaults to 60000 ms.
If you have configured a lower value, make sure it is long enough for your schema to finish building.
Updated outdated type definitions for directus_notifications, directus_permissions, directus_extensions, directus_fields, directus_activity, directus_collections, and directus_revisions (#28072)
Breaking changes in @directus/sdk:
DirectusNotification.id is now correctly typed as number.
DirectusField.schema is now nullable.
FieldMetaConditionOptionType has been removed; condition options is now Record<string, any>.
FieldMetaConditionType.hidden, readonly, required, and options are now optional, and rule is typed as a filter.
All ExtensionSchema properties are now optional, and DirectusExtension.schema can also be an ExtensionSchemaEntry.
Breaking changes in @directus/types:
Notification.id is now correctly typed as number.
Notification.status and timestamp are now nullable.
@directus/api
Improved license handling so a failed license request keeps the current license in effect and is retried by a scheduled license check, with a warning in the app showing why the license could not be renewed and when it lapses (#28331 by @ComfortablyCoding)
Removed the ip-matching dependency (#28243 by @Nitwel)
Fixed requests failing after a process was stopped during schema building (#28316 by @Nitwel)
@directus/errors
Improved license handling so a failed license request keeps the current license in effect and is retried by a scheduled license check, with a warning in the app showing why the license could not be renewed and when it lapses (#28331 by @ComfortablyCoding)
@directus/utils
Removed the ip-matching dependency (#28243 by @Nitwel)
@directus/types
Updated outdated type definitions for directus_notifications, directus_permissions, directus_extensions, directus_fields, directus_activity, directus_collections, and directus_revisions (#28072 by @kheiner)
@directus/sdk
Updated outdated type definitions for directus_notifications, directus_permissions, directus_extensions, directus_fields, directus_activity, directus_collections, and directus_revisions (#28072 by @kheiner)
✨ New Features & Improvements
@directus/app
Added a Preview Base URL project setting, selectable as a variable in a collection's Preview URL (#28227 by @robluton)
Added header bar buttons to set multiple selected Flows to active or inactive (#28321 by @robluton)
Added a confirmation dialog when saving Public policy permission changes on system collections (#28311 by @robluton)
Added a persistent warning notice when editing the Public policy (#28310 by @robluton)
Added support for linking images in the WYSIWYG editor: select an image and use the link toolbar button (or Mod+K) to wrap it in an anchor; stored <a href><img></a> markup now survives loading without triggering the normalization warning (#28289 by @alvarosabu)
@directus/api
Added a Preview Base URL project setting, selectable as a variable in a collection's Preview URL (#28227 by @robluton)
@directus/memory
Added opt-in hash option to redis memory, improving cache clear performance (#28214 by @Nitwel)
Added optional lock settings to usingLock to override the lock's duration and retry count. A signal is now passed to the callback that aborts if the lock is lost before it finishes (#28331 by @ComfortablyCoding)
@directus/system-data
Added a Preview Base URL project setting, selectable as a variable in a collection's Preview URL (#28227 by @robluton)
@directus/types
Added a Preview Base URL project setting, selectable as a variable in a collection's Preview URL (#28227 by @robluton)
@directus/sdk
Added a Preview Base URL project setting, selectable as a variable in a collection's Preview URL (#28227 by @robluton)
@directus/constants
Added a persistent warning notice when editing the Public policy (#28310 by @robluton)
@directus/env
Exported the default environment values as DEFAULTS (#28077 by @br41nslug)
🐛 Bug Fixes & Optimizations
@directus/app
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
Update license validation to only accept Directus keys and tokens (#28331 by @ComfortablyCoding)
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
Improved license handling so a failed license request keeps the current license in effect and is retried by a scheduled license check, with a warning in the app showing why the license could not be renewed and when it lapses (#28331 by @ComfortablyCoding)
Fixed tooltips not appearing on keyboard focus (#28263 by @robluton)
Fixed Norwegian time format patterns that displayed raw timestamps instead of times in datetime fields (#28332 by @u12206050)
Fixed the module navigation scrolling back to the top when navigating to another page (#28269 by @khanahmad4527)
Fixed AI translations creating duplicate target language rows when streaming multiple fields. (#28074 by @xmflsct)
Updated outdated type definitions for directus_notifications, directus_permissions, directus_extensions, directus_fields, directus_activity, directus_collections, and directus_revisions (#28072 by @kheiner)
Cleaned unsupported markup from pasted content in the WYSIWYG editor and flagged it inline, with a view of what was removed and the choice to undo the paste or redo it raw in the raw HTML editor (#28238 by @alvarosabu)
@directus/api
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
Update license validation to only accept Directus keys and tokens (#28331 by @ComfortablyCoding)
Fixed OpenAPI spec version to only change when the generated spec does (#28109 by @kheiner)
Fixed creating a collection with neither schema nor meta returning a misleading 403 instead of a 400 validation error (#28258 by @kheiner)
Fixed filtering and GraphQL typing of geometry subtype fields (e.g. geometry.Point) (#28308 by @PINYOPATTANAWASANPORN)
Fixed GraphQL marking not-null fields with a default value as nullable in queries and fields with falsey default values as required in create mutations (#28280 by @Dextheking1)
Added opt-in hash option to redis memory, improving cache clear performance (#28214 by @Nitwel)
Fixed TFA enforcement to use effective permissions (#28176 by @psang39)
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
Fixed GraphQL fragments on the union type of one M2A field returning no data when spread into another M2A field (#28305 by @Nitwel)
Unified related collection lookups to use getRelationInfo (#28246 by @Nitwel)
Fixed a GraphQL query with a __proto__ field alias being able to write a property onto Object.prototype. (#28211 by @datrixlab)
Improved validation of storage locations and paths for files (#28077 by @br41nslug)
@directus/extensions-sdk
Fixed directus-extension validate passing or crashing on missing extension paths (#28320 by @PINYOPATTANAWASANPORN)
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
@directus/composables
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
@directus/extensions
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
@directus/stores
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
@directus/themes
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
@directus/types
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
@directus/utils
Updated proxy-addr, braintrust, MCP SDK, sharp, vue, dompurify, source-map-js and serialize-javascript to address CVEs (#28334 by @br41nslug)
Fixed filtering and GraphQL typing of geometry subtype fields (e.g. geometry.Point) (#28308 by @PINYOPATTANAWASANPORN)
Unified related collection lookups to use getRelationInfo (#28246 by @Nitwel)
@directus/specs
Fixed creating a collection with neither schema nor meta returning a misleading 403 instead of a 400 validation error (#28258 by @kheiner)
@directus/cli
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
@directus/storage-driver-cloudinary
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
@directus/storage-driver-supabase
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
@directus/update-check
Updated undici, axios, nodemailer, basic-ftp, ip-address, and fast-uri to address CVEs (#28330 by @br41nslug)
@directus/env
Fixed requests failing after a process was stopped during schema building (#28316 by @Nitwel)
@directus/sdk
Fixed readActivity, deletePermission, readPermission, updatePermission, readItemPermissions, readNotification, and readRevision not rejecting a null or undefined key or collection (#28072 by @kheiner)
If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below, please read the upgrading documentation for more information on how to upgrade from previous versions.
Added
Changed
Fixed
JMAP: Creating a MaskedEmail with emailDomain fails with forbidden for every domain when the account has addresses on more than one domain.
Autodiscover: Requests for a response schema other than Outlook's, such as ActiveSync (mobilesync), are answered with the Outlook settings instead of error 601.
IMAP:
LOGIN and AUTHENTICATE with a wrong, expired or unknown app password or API key are answered with an untagged NO, so clients keep waiting for the command to complete until the connection times out.
The failed login that exceeds the maximum number of authentication failures is answered with an untagged NO before the connection is closed.
DKIM:
A rotation moves the active key to retiring even when its successor fails to publish or propagate, so outgoing mail is sent unsigned until a retry publishes the new key. The DNS write failure is also not logged and the task reports success.
Keys created while DNS management was manual, or before DKIM was added to the published records, are never rotated after DNS management becomes automatic. Domains already affected start rotating once a DkimManagement task is created for them.
After switching DNS management from automatic to manual, a due rotation activates a new key that was never published in DNS, so signatures fail verification, and retiring the old key is retried forever.
Spam filter:
Messages with no text line long enough for a Pyzor digest are checked with the digest of empty input and tagged PYZOR.
DNSBL answers with several return codes, such as a Spamhaus ZEN listing in both SBL and PBL, are scored for only the first code returned.
DNSBL lookups that return "not listed" are cached for 24 hours regardless of the zone's negative TTL.
Removing a duplicate training sample of a message reclassified on the same day clears the blob link of the sample that is kept.
MTA: Queue quotas with an empty match expression are never enforced, including the global queue quota created on first start.
RocksDB: The info log (LOG, LOG.old.*) grows without limit because log rotation and retention are left at RocksDB defaults.
WebUI: A blob store read error at startup, such as an S3 authentication failure, stops the web interface from being downloaded.
Fixed duplicate "Save Replay" hotkey entries when switching profiles in Beta 1-4 [xtfo] (#13943)
Fixed warning dialogs on macOS not rendering rich text in Beta 1-4 [Warchamp7] (#13949)
Fixed source icon state appearing inverted in Beta 1-4 [Warchamp7] (#13953)
Fixed audio monitoring settings not saving in Beta 1-4 [Warchamp7] (#13951)
Fixed missing encoder check showing missing encoders in an output mode that is not currently selected in Beta 1-4 [Warchamp7] (#13950)
Fixed Windows updater not updating game capture and virtual camera in some cases in Beta 1-4 [Warchamp7] (#13939)
Beta 4 Changes
Fixed a CI and packaging issue. There are no application changes since Beta 1.
Beta 3 Changes
Fixed a CI issue. There are no application changes since Beta 1.
Beta 2 Changes
Fixed a versioning issue. There are no application changes since Beta 1.
33.0 New Features
Updated CEF from 127/6533 to 150/7871 [WizardCM] (#13900)
This is a massive update to the underlying framework used for browser sources and docks from the July 2024 release to September 2026
All of this work is on the backend and should be invisible to users. Please be sure to report any new weirdness or problems you run into with browser sources!
Complete overhaul to plugin loading [FiniteSingularity/PatTheMav] (#13594)
First-party plugins are now in a new folder named core
Third-party plugins have an updated installation location and folder structure
Existing third-party plugins will continue to load from the legacy locations until OBS Studio 34.0
Added a startup error if obs-transitions failed to load [notr1ch] (#13321)
Improved file splitting for Hybrid MP4/MOV [derrod] (#13386)
Fixed outputs getting stuck running when a bad rescale output resolution is set [suogesi] (#13375)
Fixed monitoring icon state getting desynced when using third-party tools or websockets [prgmitchell] (#13822)
Fixed potential crash when shader cache file is invalid [notr1ch] (#13538)
Fixed a potential crash on Linux when USB mic is removed [R0te/RytoEX] (#13922)
Fixed a potential crash when renaming a source with the Add Source window open [Warchamp7] (#13800)
Fixed a potential deadlock during video/audio tasks [exeldro] (#13579)
Fixed an issue with B-frame offset calculation in AMF that could cause streams to disconnect [lexano-ivs] (#13762)
Fixed PipeWire screencast sources being duplicated in studio mode [tytan652] (#13673)
Fixed a potential crash when switching off a newly created profile [Warchamp7] (#13182)
Fixed a source toolbar crash when source type is missing [Penwy] (#13539)
33.0 Developer Information
Added frontend event and output signal for replay buffer saving [Penwy] (#8955)
Added guidance regarding the theme system to the top of all theme files [Warchamp7] (#13733)
Added ability to set a file extension filter for OBS_PATH_FILE_SAVE path types [FiniteSingularity] (#10190)
Added obs_frontend_is_safe_mode for first-party plugins
Third-party plugins are not loaded at all in Safe Mode
Added versions to Flatpak plugin extension point [tytan652] (#13735)
The minimum supported versions of Visual Studio, Windows SDK, and clang-format have been increased. Previous versions may continue to work, but will no longer be tested/supported. It is recommended that build environments are kept up-to-date with the project's toolchain.
Changed Windows builds to use Visual Studio 2026 and SDK 26100 [RytoEX] (#13543)
Changed clang-format version used to 22.1.3 [PatTheMav] (#13549)
Fixed warning dialogs on macOS not rendering rich text [Warchamp7] (#13949)
Fixed source icon state appearing inverted [Warchamp7] (#13953)
Fixed audio monitoring settings not saving [Warchamp7] (#13951)
Fixed missing encoder check showing missing encoders in an output mode that is not currently selected [Warchamp7] (#13950)
Fixed Windows updater not updating game capture and virtual camera in some cases [Warchamp7] (#13939)
Beta 4 Changes
Fixed a CI and packaging issue. There are no application changes since Beta 1.
Beta 3 Changes
Fixed a CI issue. There are no application changes since Beta 1.
Beta 2 Changes
Fixed a versioning issue. There are no application changes since Beta 1.
33.0 New Features
Updated CEF from 127/6533 to 150/7871 [WizardCM] (#13900)
This is a massive update to the underlying framework used for browser sources and docks from the July 2024 release to September 2026
All of this work is on the backend and should be invisible to users. Please be sure to report any new weirdness or problems you run into with browser sources!
Complete overhaul to plugin loading [FiniteSingularity/PatTheMav] (#13594)
First-party plugins are now in a new folder named core
Third-party plugins have an updated installation location and folder structure
Existing third-party plugins will continue to load from the legacy locations until OBS Studio 34.0
Fixed script injection in event scripts. With JScript, untrusted values passed to event handlers (such as the logon password in OnClientValidatePassword, or error text and UIDs sent by remote servers) could break out of their string. With either script language, a rule's "Run function" name could carry code. This would allow an attacker to run arbitrary code in the hMailServer process. Values are now escaped, and rule function names may only contain letters, digits and underscores.
If you are unable to install this version, disable JScript execution and do not give end-users access to the hMailServer COM API.
If you are upgrading from v0.16.x, replace the binary (or run docker pull). If you are upgrading from v0.15.x and below, please read the upgrading documentation for more information on how to upgrade from previous versions.
Added
DNS: PowerDNS Authoritative provider for automatic DNS record management.
Changed
Fixed
Troubleshoot tool: TLSA records are looked up for every MX host, including hosts whose zone is not DNSSEC signed.
Spam filter:
OpenPhish and PhishTank entries containing uppercase characters never match, since message URLs are lowercased while HTTP lookup entries keep their original case. HTTP lookups now match keys case-insensitively.
URL shortener links are followed using the lowercased URL, so case-sensitive short links resolve to the wrong destination or not at all.
Incremental training never advances its position past the first run, so every retained sample added since then is trained again, and counted again in the reservoir, on each run until it expires.
Updating the rules only adds new objects, so upstream changes to existing rules, DNSBL servers, HTTP lookups, lookup keys and file extensions never reach an existing installation.
Updating the rules reports success when objects fail to import, or when a configuration error stops the updated settings from being activated.
JMAP:
A PushSubscription created within the verification rate limit window of another one on the same account never receives its PushVerification, since the blocked verification is dropped instead of being sent once the window expires.
A push notification retried after a failed delivery can report an older state than a change queued during the failed attempt, since the older state changes are merged last and overwrite the newer ones.
Changes made while a push request is in flight are not delivered until the next change reaches the same subscription, since a successful delivery cancels the pending retry.
The VAPID aud claim is derived from a hand-written parse of the push URL, so a crafted push URL can make the server sign a token for a push service other than the one the request is sent to.
Email/import rejects a blobId that refers to a Blob/upload creation id in the same request ("#u0") with Invalid blob id..
Email/set with a full mailboxIds object identical to the current mailboxes, together with a keyword change, stores the message with IMAP UID 0, so IMAP clients stop seeing it.
MTA:
A node without the outboundMta role stops replying to DATA and to JMAP submissions once about 1024 messages have been queued on it.
MX records are resolved through the DNSSEC-validating resolver even when DANE is disabled.
A DATA stage Sieve script does not see headers added by milters or MTA hooks, and discards every milter and MTA hook change when it edits the message.
MySQL: Range deletions and search index removals start with a single unbounded DELETE and switch to chunks only after a timeout.
IMAP: COPY and MOVE fail with NO [CONTACTADMIN] when another session changes the same message at the same time.
Autodiscover: Implicit TLS ports (993, 995, 465) are advertised with <Encryption>TLS</Encryption>, which Outlook reads as STARTTLS.
HTTP: Idle keep-alive connections are never closed.
Fixed a CI and packaging issue. There are no application changes since Beta 1.
Beta 3 Changes
Fixed a CI issue. There are no application changes since Beta 1.
Beta 2 Changes
Fixed a versioning issue. There are no application changes since Beta 1.
33.0 New Features
Updated CEF from 127/6533 to 150/7871 [WizardCM] (#13900)
This is a massive update to the underlying framework used for browser sources and docks from the July 2024 release to September 2026
All of this work is on the backend and should be invisible to users. Please be sure to report any new weirdness or problems you run into with browser sources!
Complete overhaul to plugin loading [FiniteSingularity/PatTheMav] (#13594)
First-party plugins are now in a new folder named core
Third-party plugins have an updated installation location and folder structure
Existing third-party plugins will continue to load from the legacy locations until OBS Studio 34.0
MeTube now refuses requests sent from other websites unless their origin is listed in CORS_ALLOWED_ORIGINS. This closes a security hole (GHSA-cxj8-27g9-669f). If you use a bookmarklet, add the sites you use it on, e.g. CORS_ALLOWED_ORIGINS=https://www.youtube.com. Details in #1085.
Changes
docs: point readers at the wiki from the README top and the issue forms (dfe3daa)
fix: let a refused bookmarklet see why it was refused (e165b36)
test: pin that scheme-less internal URLs are refused before any fetch (2979e3a)
fix: refuse state-changing requests and socket connections from other sites (772a16c)
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