OBS Streaming

OBS Design Fundamentals – Image Slide Show

Image Slide Show Source enables you to take multiple image files or a directory of image files and have them be controlled manually or transition after a set time has elapsed. Image slide show is an effective way of presenting lessons or making dynamic changes to your background.

Visibility Behavior

Visibility Behavior determines how the image slide show operates when you transition to a different scene in OBS. From the dropdown list here are the options:

  • Always play when not visible (Default) – Slide show will continue to play regardless of active scene.
  • Stop when not visible, restart when visible – Slide show will stop when not visible and will start from initial image when activated.
  • Pause when not visible, unpause when visible – Slide show will pause on last image when not visible and slideshow will continue playing when activated.

Slide Mode

Slide mode allows you to decide if you would like the images to transition based on a set period or to be controlled manually. If you decide to control the slide show manually, you will need to set hotkeys in OBS settings to move between images. Note that you can control the image slide show from the UI below the Preview Window if you have the image slide show source selected.


The transition property allows you to decide the effect that takes place when the slide show moves to the next image. There are four types of transitions you can choose from

  • Fade (Default) – Images fade in and out.
  • Cut – Images will instantly appear when moving to the next slide.
  • Swipe – Images will slide out of the slide show to the left.
  • Slide – Images will slide into the slide show from the right.

Time Between Slides

If you decide to have the slide show play using the slide show automatic, the slide show will wait for the set amount of time based on milliseconds before moving to the next image in the slide show. It is important to know that for every 1000 milliseconds is one second. So, if you want to give each image in the slideshow 15 seconds, you will want to set the time between slides to 15000 milliseconds.

Transition Speed

Transition speed will let you control how long each transition effect will last between each slide. Note that the transition speed does not affect the cut transition since the transition is instant. Like the Time Between Slides property, the transition speed property is controlled by milliseconds. If you set the transition to fade and set the transition speed to 10000 milliseconds, the transition effect will last 10 seconds before showing the next image in the slide show in full. So be mindful of the amount of time when deciding on a transition effect.


If you want the image slide show to keep playing after all images have been shown, check the loop option.

Hide When Slideshow is Done

This checkbox will force the slideshow when completed to automatically hide itself once the slideshow is completed. When you hide a source, the source itself will no longer be visible to viewers. However, the image slideshow source will follow the rules set by the Visibility Behavior property when the slideshow is hidden.

Randomize Playback

Randomize Playback will take all images and cycle them in a random order. Randomize Playback is best used with backgrounds or images that don’t have a specific order.

Bounding Size/Aspect Ratio

The Bounding Size/Aspect Ratio property will scale all images in the slide show to be contained in a set aspect ratio. This is a useful option if you have multiple images of varying sizes but need them scaled to fit in the scene. The drop-down list offers the following options.

  • Automatic (Default) – All images will be automatically scaled to fit based on the dimensions of the largest image.
  • 16:9 – All images will be scaled to fit a 16:9 aspect ratio.
  • 16:10 – All images will be scaled to fit a 16:10 aspect ratio.
  • 4:3 – All images will be scaled to fit a 4:3 aspect ratio.
  • 1:1 – All images will be scaled to their original dimension.
  • 1920 x 1080 – All images will be scaled to a 1920 x 1080 resolution.

Image Files

The image files property is where you’ll be able to add or remove images or directories from the image slide show source. Clicking the + sign will give you the option to add individual images or select a folder that will then include all images into the slide show. Clicking the – sign will remove individual images or the folder directory from the slide show. If there are a specific group of images you need to use, it is a best practice to put the images in a folder and then add that folder to the slide show as a directory.

By clicking the gear, you will be able to change the image file or directory with another image file or directory. Select the image file or directory you with to change, click the gear and a pop-up window will appear where you can select the new image file or directory you want to use.

Finally, the up and down arrows allow you to set the order of images or directories that you want shown in the slide show. If you need change the order, select the image or directory you need to move and click on the up or down arrow.

It is important to note that when working with directories, the order will be pre-set by the order set within the folder itself and cannot be controlled by the image slide show source itself.

Create an Image Slide Show

For this exercise, we’re going to be using the large window for the Image Slide Show Source. This time you will need to use images you already have on your computer. It could be images from a PowerPoint presentation or a directory of images that you have in your pictures folder.

1.      Click on the + sign and add Image Slide Show and press OK in the pop-up window.

2.      Change the Time Between Slides from 8000 milliseconds to 3000 milliseconds.

3.      Set Bounding Size/Aspect Ratio to 16:9.

4.      Click on the + sign and the images or the folder directory.

5.      Click OK

That is how you create an image slide show source. Image slide show is a great source to use to be used to share multiple images, presenting information, or as backgrounds for your scenes. It is important to set the order of images in the properties or if using a directory to set the order of images inside the directory.