Exporting Quilt Images and Video with Sequencer

For creating videos with the Looking Glass display we’re going to use the Sequencer which is Unreal Engine's built-in cinematic editing tool.

Controlling the HoloPlay Capture via Sequencer:

You can animate properties like Size & FOV using sequencer by tracking your HoloPlay Capture, then tracking the "render camera" element.

Make sure to just track the FOV variable and not the "field of view" variable, as the former is what actually controls the field of view of the HoloPlay Capture.

1) Add a Level Sequence to your scene

On the toolbar above the Main Viewport in the editor you will find a button that looks like a movie clapper board. Press the down arrow next to it and select Add Level Sequence. This will spawn a Level Sequence in your scene.

2) Open your Level Sequence

Unlike a normal cinematic sequence you don't need a camera track. In fact you don't even need a track for the HoloPlay Capture actor! As long as you have a HoloPlay Capture Actor or component in your scene, your sequence will capture a quilt!

Tracking your HoloPlay Capture

First click the Track button with the green plus and choose your HoloPlay Capture, then click the smaller white track button on the HoloPlay Capture track, from there choose "RenderCamera". The Render Camera object will have all of the variables exposed that you can control. The ones you'll probably care the most about are FOV and Size.

There's a second "field of view" variable, ignore this, it doesn't do anything. The variable you want is FOV.

A screenshot showing the "RenderCamera" Object

A screenshot showing the variables available on the "RenderCamera" Object.

4) Open Render Movie Settings

Once you are ready to export you can select the Render button which will open the Render Movie Settings.

Note that you'll want to make sure to use the Movie Scene Capture for now as the Movie Render Queue is not supported at this time.

5) Capture Movie

In order to properly capture a Quilt you'll need to set compression quality to 100, and resolution to custom and then to one of the standard resolutions for our devices:

• 3360 x 3360 for the Portrait

• 8192 x 8192 for the 32" and 65"

These settings will get applied automatically if you select the appropriate device from the Looking Glass Tiling Settings dropdown.

You'll need to set the image output format to Image Sequence (png). You can encode to a movie format like AVI but Looking Glass Studio doesn't support .avi so you will have to re-encode the video.

6) Compile your image sequence into a video

After you have your image sequence exported you'll need to compile the frames into a video file, preferably mp4 or webm. To do this please follow the guide here:

🎬Quilt Video Encoding