# Captioning with OBS (Application Source)

Using OBS you can capture the Zip Captions window using the Source capture and then Chromakey your captions. This method will result in overlayed open captions, which can then be combined with the [**Simple Method**](https://help.zipcaptions.app/example-use-cases/live-event-captioning) to provide captions in your stream as well. 

1. Open OBS
2. Open the Zip Captions PWA ([Instructions on installing the PWA](https://help.zipcaptions.app/getting-started/installing-the-zip-captions-app))
3. Add a **Window Capture** to the **Sources** by clicking on the + underneath the sources window.

<figure><img src="https://1608469805-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCUIvSrSYUotCp2ajUEtk%2Fuploads%2FC9GeoFgcgw9IhI3jAfCV%2FScreenshot%202024-04-06%20at%2012.16.44%E2%80%AFPM.png?alt=media&#x26;token=0e54cee4-b144-4822-9eb8-11e8be393e21" alt=""><figcaption><p>The Sources panel. This is what you should end up with. </p></figcaption></figure>

4. Choose the **Window Capture** method, and choose **Zip Captions** PWA from the window drop down.

<figure><img src="https://1608469805-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCUIvSrSYUotCp2ajUEtk%2Fuploads%2FggzI37kCpLUq1iX86sPp%2FScreenshot%202024-04-06%20at%2012.17.22%E2%80%AFPM.png?alt=media&#x26;token=7d5e5892-9b97-44ce-9947-dd831375b5e7" alt=""><figcaption><p>Choosing the Window Capture and the Zip Captions Window</p></figcaption></figure>

5. Click **OK**&#x20;
6. Now click on the + again, and this time choose the **Colour Source** option.&#x20;
7. Click on the **Filters** button which shows above the sources.

<figure><img src="https://1608469805-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCUIvSrSYUotCp2ajUEtk%2Fuploads%2FoUc02QNeVrP3yFAXVDMT%2FScreenshot%202024-04-06%20at%2012.17.48%E2%80%AFPM.png?alt=media&#x26;token=094a7ef2-17d9-49e7-bdbf-07f17f303e18" alt=""><figcaption><p>Choose Filters for the Colour Source</p></figcaption></figure>

8. We are now going to add a Chroma Key filter to the colour source.&#x20;
9. Click on the + and choose **Chroma Key**, in the 'Key Colour Type' choose **Blue**, and make sure that it matches the settings below.&#x20;

<figure><img src="https://1608469805-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCUIvSrSYUotCp2ajUEtk%2Fuploads%2FMiTWkuI0LFHH6Q1KzHTS%2FScreenshot%202024-04-06%20at%2012.18.10%E2%80%AFPM.png?alt=media&#x26;token=96b3791b-a97d-44e5-8f63-49a93421a7f3" alt=""><figcaption><p>Add a Chroma Key Filter</p></figcaption></figure>

10. Click Close
11. Resize your window source so that the captions are shown to your needs.&#x20;
12. Go to your Zip Captions PWA window, and in the settings menu, set your theme to **Aqua**.&#x20;

<figure><img src="https://1608469805-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCUIvSrSYUotCp2ajUEtk%2Fuploads%2FEqOZRLPu8Bzgk9XkkrMZ%2FScreenshot%202024-04-06%20at%2012.19.01%E2%80%AFPM.png?alt=media&#x26;token=1dcf425a-6e8a-42fa-9118-99e8ce73d95d" alt=""><figcaption><p>Change the Zip Captions theme to Aqua</p></figcaption></figure>

13. Open the Preview window in OBS, right click on the preview window, and then select "FullScreen Projector (Preview)" or "Windowed Projector (Preview)". You can then place this onto a second output.


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