Very simple example of obs-studio-node usage

Out of the box it works only on Windows. For running it on MacOS see below: Run on MacOS.

Setup

yarn install

Run

yarn start

or use F5 in Visual Studio Code.

Package

yarn dist

You find the generated installer in the dist folder.

Current state

It launches, initializes OBS Studio and lets you press "Start recording" button. On recording it captures your desktop video, your webcam picture (if available), audio, and microphone to the video file in Videos folder in your user profile directory. Look at main process' console output.

See this topic on how to solve black screen on laptops with two video cards.

Virtual Camera

After clicking the Install Plugin and the Start Virtual Camera button, a new webcam will be available for you to use in any other program (like Zoom or Microsoft Teams).

It will output exactly the same content which is displayed in the preview, in this case, it's the screen recording and maybe your webcam.

However, the webcam shows up as Streamlabs OBS Virtual Camera and we can't change the name for now (see #44).

Code of interest

Most of the interesting things are located in obsRecorder.js. Some snippets are taken verbatim from obs-studio-node tests and streamlabs-obs source code, but some are results of experiments.

Documentation

You can find some basic documentation here.

Run on MacOS

Change link to obs-studio-node in your package.json to include version of package built for MacOS:

 "obs-studio-node": "https://s3-us-west-2.amazonaws.com/obsstudionodes3.streamlabs.com/osn-0.9.5-release-osx.tar.gz",
 "node-window-rendering": "https://slobs-node-window-rendering.s3-us-west-2.amazonaws.com/node-window-rendering-1.0.12-osx.tar.gz"

To get the latest url, clone streamlabs-obs, run yarn install and copy it from the output.

Execute yarn:

yarn install

Start the app from a native terminal, not an integrated terminal like VSCode's.

node-window-rendering is used to support preview for MacOS.

There are some known issues with MacOS:

• obs64 process doesn't shutdown on app quit (#22)
• errors in log files (#18)

If you can help with those, please fix them and open a pull request!

Use with your own build of obs-studio-node

1. Build it somewhere (look at the docs first)

   git clone https://github.com/stream-labs/obs-studio-node.git
   cd obs-studio-node
   yarn install
   git submodule update --init --recursive
   mkdir build
   cd build
   cmake .. -G"Visual Studio 15 2017" -A x64 -DCMAKE_INSTALL_PREFIX="SOME_WRITABLE_PATH"
   cmake --build . --config Release
   cpack -G TGZ
   

2. Place path to it to package.json:

   {
       "devDependencies": {
           "obs-studio-node": "file://C:/where/you/cloned/obs-studio-node/build/obs-studio-node-0.3.21-win64.tar.gz"
       }
   }
   
   

3. Install it to node_modules/

   yarn install
   

4. Launch as usual:

   yarn start
   

Misc

OBS logs can be found in osn-data\node-obs\logs.

Tips and tricks

Change webcam resolution

let settings = obsCameraInput.settings;
settings['res_type'] = 1
settings['resolution'] = "1920x1080",
obsCameraInput.update(settings);
obsCameraInput.save();

See #31 for details.

License

As OBS Studio itself is published under the terms of GNU GPL version 2, obs-studio-node and all application that are using it (including this example application) also have to be open-sourced and published under the terms of GNU GPL version 2 or compatible license. Read more on tldrlegal.com.