Writing HEIF / HEIC images with Linux tools is apparently difficult due to interpretations regarding potential patents on standards used in them in the open source community. I could build an imagemagick which writes HEIC, but didn't manage yet to modify attributes in them. For changing attributes I could only find this so far: https://developer.apple.com/documentation/ImageIO/writing-spatial-photos
That tool can be run from the command line, but only on macOS due to the ImageIO library which is not available in the Swift for Linux version.
areoinfo
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Same question for me! Currently it only shows the right eye and I like to toggle between right and left for some checks if what I'm planning is actually possible on the device before buying one to develop my app for it.