[tantalor]

Here's a LGPL decoder: https://github.com/strukturag/libheif

[pornel]

Patents are separate from copyright, so even an independently developed freely licensed open-source software is illegal to use without a patent license from patent owners.

https://www.hevcadvance.com/pdfnew/LicensorList.pdf

[Gaelan]

Assuming GP is right about the patents, the College Board would open themselves up to patent suits by using that without a license.

[mlyle]

Maybe they should just pay the $5 fee...