RIDE STORY uses heic-to 1.5.2, unmodified, loaded as a separate browser script.
Copyright and license: https://github.com/hoppergee/heic-to
LGPL-3.0-or-later: heic-to-LICENSE.txt and GPL-3.0.txt in this directory.
Corresponding source and build instructions:
https://github.com/hoppergee/heic-to/tree/v1.5.2
https://github.com/hoppergee/heic-to (release 1.5.2, libheif 1.22.2)
Dependencies include libheif (LGPL-3.0) and libde265 (LGPL-3.0):
https://github.com/strukturag/libheif/tree/v1.22.2
https://github.com/strukturag/libde265/tree/v1.0.16
The standalone decoder can be replaced without changing RIDE STORY.
Photo files are decoded on the participant device; no external conversion service.