Overview
OBS is a compositor with an encoder attached. You build scenes out of sources, a game capture, a window, a camera, a browser page, an image, a text field, arrange and filter them, and then either record the composed result to disk or push it to a streaming endpoint. That is the whole model, and its simplicity is why it has outlasted every commercial competitor and why almost every streaming setup you have ever seen is running it underneath.
This package is the standard build together with the plug-ins that a fresh install always ends up needing anyway: the virtual camera, the audio routing filters, the scene switcher, the replay buffer helpers and the browser source dependencies. Both the installer and the portable folder version are inside the archive so it can be run from a stick on a machine you do not own.
Scenes, sources and filters
A scene is an ordered stack of sources composited top to bottom, each with its own transform and filter chain. Transitions between scenes can be a cut, a fade or a stinger built from a video file with a defined transition point. Sources can be shared between scenes so that a camera exists once and appears in six layouts, meaning a settings change propagates everywhere at once.
The filter chain is where most of the quality comes from. Chroma key with adjustable spill reduction and edge softness, colour correction, crop and pad, scaling with a choice of algorithm, and on the audio side noise suppression, noise gate, compression and limiting. Filters apply per source or per scene, and the ordering inside the chain matters, which is the thing new users learn the hard way.
Capture, encoding and output
Game capture hooks the target application directly and is far cheaper than screen capture, which matters when the same machine is both playing and encoding. Window and display capture cover everything else, and there are capture methods to fall back on when an application refuses the hook. Camera and capture card inputs appear as ordinary sources with their own resolution and format selection.
Encoding runs on the graphics card through the vendor encoders or on the processor through the software encoder, with the software path giving better quality per bit at a much higher cost. Recording can use a different encoder and bitrate from the stream simultaneously, so a session can be streamed at a modest bitrate while a high quality local file is written at the same time. The replay buffer keeps the last stretch of video in memory and writes it out on a hotkey.
Audio routing and automation
The mixer handles multiple inputs with per source monitoring, so you can hear a source yourself without sending it to the output, or send it to both. Tracks let different audio sources be recorded onto separate channels of the same file, which is the correct way to record a conversation you intend to edit later. Sync offsets fix a camera that arrives a few frames behind its audio.
The websocket interface exposes control to external tools and stream decks, and hotkeys cover essentially every action including per source mute and scene switching. The included automatic scene switcher changes scene based on the focused window, which is enough automation for most single machine setups without adding anything else.
What you get
- Unlimited scenes and sources with per source transform and filter chains
- Chroma key, colour correction, scaling and crop filters built in
- Audio noise suppression, gate, compression and limiting per source
- Game capture by direct hook plus window and display fallbacks
- Hardware and software encoding with separate settings for stream and recording
- Simultaneous streaming and high quality local recording
- Replay buffer written out on a hotkey
- Multi track audio recording for later editing
- Websocket control interface, hotkeys for every action and an automatic scene switcher
Inside the archive
- OBS Studio installer and portable folder build
- Virtual camera, audio routing and scene switcher plug-ins
- Browser source runtime dependencies
- Language files for the interface list shown above
- Notes on portable operation and profile transfer
System requirements
| Operating system | Windows 10 version 21H2 or Windows 11, 64-bit |
|---|---|
| Processor | Quad core for software encoding, less if using the card |
| Memory | 8 GB recommended |
| Graphics | DirectX 11 capable card, hardware encoder strongly recommended |
| Storage | 1 GB for the program, plus space for recordings |
| Network | Upload capacity matching your intended stream bitrate |
Installing it
- Unpack the archive and choose the installer or the portable folder.
- If installing, run setup and let it place the plug-ins automatically.
- If portable, copy the whole folder to its destination and run the executable from inside it.
- Run the auto configuration wizard once to get a sane starting encoder setting.
- Record a thirty second test and check the file before relying on the setup for anything live.
Mirrors
| Route | Region | Note | State |
|---|---|---|---|
| Direct, primary | Europe | No wait, resumable | Online |
| Direct, secondary | North America | No wait, resumable | Online |
| Torrent magnet | Global | Direct is usually faster at this size | Online |
Release history
- Bundled plug-in set rebuilt against the current release
- Fixed game capture hook failing on some full screen applications
- Replay buffer memory handling improved on long sessions
- Multi track recording defaults adjusted
- Websocket interface authentication simplified
- Browser source runtime updated
- Audio monitoring device switching no longer requires a restart
Questions about this release
Which encoder should I use?
If your graphics card has a hardware encoder, use it. The software encoder gives slightly better quality per bit but takes processor time away from whatever you are capturing.
Why is my capture a black screen?
Usually a mismatch between which graphics adapter runs the game and which runs OBS on a laptop with two. Force both onto the same adapter in the system graphics settings.
Can I run it from a USB stick?
Yes. The portable build keeps its configuration inside its own folder, so it leaves nothing behind on the host machine.
Does the virtual camera work in video calls?
Yes. Start it from the main window and it appears as a camera device in any application that lists cameras.
Comments
Portable build on a stick, used it on a machine at a venue. Left nothing behind.
Multi track audio recording is the feature nobody talks about and it saves every interview I edit.
Comments are read before they appear. If a build stops working, say so here and it gets rebuilt rather than quietly left up.
Plug-ins already in place saved the usual hour of hunting them down individually.