Question / Help SOLVED: How do I specify a portion of my base canvas to be streamed?

[officiallxander]

If any of you are familiar with livestream studio, you are able to set your project to 16x9 and select a different aspect ratio to stream. in other words, 16x9 base with 9x16 streamed aspect ratio means that livestream studio will capture the centered 9x16 portion of the 16x9 canvas and crop the rest out. Please do not confuse this with scaled output or setting the canvas to 9x16. My use case requires 16x9 canvas and 9x16 unscaled streamed output.

Is this possible in OBS?

 

[carlmmii]

Short answer: no. Not the way you're wanting.

Long answer: it's possible using multiple OBS instances and NDI. Run your main instance in whatever your project canvas aspect ratio should be. Set this instance to output to NDI. Then on a separate instance, set your canvas resolution/aspect ratio to the stream output, include the NDI source cropped how you want, and start stream from this.

 

[officiallxander]

the second instance doesn't communicate with my streamdeck, which I need to control.

 

[officiallxander]

SOLUTION:
1. Set base canvas to 16x9 and output scaling to 9x16.
2. Set all your intended stream source transforms to 'Stretch to bounds' in 'Bounding Box Type' field.
3. Fit your 9x16 elements to the 16x9 screen (will look stretched, this is OK)
4. Add your true 16x9 elements to your project and use as needed.