<p>You could eliminate the gap by reducing the width of the Base Resolution from 3840 to what fits: 1280 + the width of the powerpoint presentation. You may need to drag the righthand frame over, but it should fit.</p>
<p>But you've got another issue: your Base and Output are very different aspect ratios, so your output will be distorted as it smushes 50% horizontally (to use a technical term :-).</p>
<p>If you're going to output (capture) 16:9, I believe your canvas needs to be at that ratio too. If you keep the base height 1080, the base width should be 1280 / 720 * 1080 = 1920.</p>
<p>To handle that, you can start by cropping your Facetime camera on the sides, although it won't be enough. You'll need a different aspect ratio in your PowerPoint itself, which will likely require changing the layout of all your slides. Alternately, you could shrink down the presentation in OBS, leaving a gap above and below it and have a nice background color behind the whole frame (or some cool looping animation).</p>

CC BY-SA 4.0
2021-11-02T17:09:04.697Z
2021-11-02T17:09:04.697Z
Paul Collins
<p>I'm using OBS v25.0.8 for Mac and I'm trying to capture a two screen video, one from my laptop camera (Facetime camera 1280x720) and one presentation (Window share PowerPoint).</p>
<p>I set up my video config as follows:</p>
<ul>
<li>Canvas 3840x1080</li>
<li>Output 1280x720 (OBS set this automatically)</li>
</ul>
<p><a href="https://i.sstatic.net/bCiTp.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/bCiTp.png" alt="enter image description here" /></a></p>
<p>As you can see from the screenshot above, the PowerPoint presentation is not taking the full width, leaving an empty space between the two screens.</p>
<p>I tried changing the output ratio, but nothing seems to happen. My laptop is a Macbook Pro with the following display 15.4-inch (2880 × 1800)</p>
<p>What is the correct calculation to get the two screens to fit proportionally?</p>

<obs>
OBS issues when capturing two screens
XueXu
# OBS issues when capturing two screens

(Asked by: username_0 on 2021-10-05)

I'm using OBS v25.0.8 for Mac and I'm trying to capture a two screen video, one from my laptop camera (Facetime camera 1280x720) and one presentation (Window share PowerPoint).

I set up my video config as follows:

* Canvas 3840x1080
* Output 1280x720 (OBS set this automatically)

[![enter image description here](https://i.sstatic.net/bCiTp.png)](https://i.sstatic.net/bCiTp.png)

As you can see from the screenshot above, the PowerPoint presentation is not taking the full width, leaving an empty space between the two screens.

I tried changing the output ratio, but nothing seems to happen. My laptop is a Macbook Pro with the following display 15.4-inch (2880 × 1800)

What is the correct calculation to get the two screens to fit proportionally?

**Tags:** obs


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## 1 answers

### Answer by username_1 on 2021-11-02. Score: 0

You could eliminate the gap by reducing the width of the Base Resolution from 3840 to what fits: 1280 + the width of the powerpoint presentation. You may need to drag the righthand frame over, but it should fit.

But you've got another issue: your Base and Output are very different aspect ratios, so your output will be distorted as it smushes 50% horizontally (to use a technical term :-).

If you're going to output (capture) 16:9, I believe your canvas needs to be at that ratio too. If you keep the base height 1080, the base width should be 1280 / 720 \* 1080 = 1920.

To handle that, you can start by cropping your Facetime camera on the sides, although it won't be enough. You'll need a different aspect ratio in your PowerPoint itself, which will likely require changing the layout of all your slides. Alternately, you could shrink down the presentation in OBS, leaving a gap above and below it and have a nice background color behind the whole frame (or some cool looping animation).


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