Read/write spatial video/spatial photos

Apple has launched 3D video/Photos support in Apple Vision Pro (hereafter referred to as AVP) under the name "Spatial Video/Spatial Photos.
Spatial video/spatial photos can be taken with the built-in camera of the AVP, but the iPhone15 Pro/Pro Max now has the ability to take spatial video (3D video) with the two rear cameras (wide-angle and ultra-wide-angle), as shown in the figure above. Spatial photos is not yet supported by the iPhone as a standard feature, but it can be created with third-party applications or by using this application (i3DMovieMaker).
The "Spatial Video/Spatial Photo" can only view one side of a 2D image with the iPhone's photo application, but with this application (i3DMovieMaker), the left and right images can be read separately, converted to various 3D formats, croped, adjusted to the left and right positions, and saved. Of course, it is also possible to save the images as spatial video/photos.
Furthermore, by using the app's built-in camera function, even iPhones that do not support spatial video can take 3D videos and photos with the two rear cameras and save them as spatial videos/photos, as long as they are iPhone XS/11/12 series or later and have side-by-side rear cameras.
This application (i3DMovieMaker) is a free application, but in-app purchase is required to save videos. Once billed, all functions can be used forever afterwards.

Shooting spatial video with iPhone15 Pro/Pro Max and how to use this application

1. The following settings are required to shoot spatial video even on compatible iPhones.
Settings app. -> Camera -> Formats (see below) Turn on "Spatial Video for Apple Vision Pro".

2. Tap the AVP icon in the video mode of the standard camera application, as shown in the figure below,
Tap it, and you can shoot spatial video.

3. Start this application (i3DMovieMaker) and press the "File" button.

4. Select "Open media files" when the menu appears.

5. Albums list will appear.
Spatial video/spatial photos will go into the "Spatial" album, so select "Spatial".

6. Spatial videos/spatial photos list is displayed. As shown in the figure below, spatial video and spatial photos
are marked differently in the lower left corner of the thumbnail image. In addition,
the length of the video (in seconds) is displayed above the resolution of the spatial video.
Both spatial photos and spatial videos can be opened separately on the left and right, so select the file
you want to open and press "Done" in the upper right corner of the screen.

7. As shown in the figure below, the left and right images are displayed separately,
so you can be edited and saved in the same way as regular 3D images.

8. Select "Save Spatial movie/photo" from the "File" menu if you wish to save it as a spatial video/photosk.

9. In the case of a spatial photo, the image is immediately saved in its original resolution,
In the case of a spatial video, the settings screen shown below will appear.
If you want to change the resolution of the saved video, turn on "Change saved video size",
Specify the width of the saved video in pixels (the height is automatically calculated from
the original aspect ratio)
If you are not sure about the other settings, leave them at their default values and
press "Save Spatial Video".
The behavior in AVP is unknown, but probably the Horizontal Field of VIew and Stereo Camera Base
do not affect the view. The Disparity adjustment value seems to be the value that determines
whether the spatial video display should be in the back or in the front.