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Your statement that "Nokia has licensed their HEIF patents under royalty-free terms" is not true, because the license-in-question's [1] grant is "to, use, run, modify (in a way that still complies with the Specification), and copy the Software within the Licensed Field."

Licensed Field is defined to be: "(...) the non-commercial purposes of evaluation, testing and academic research in each non-commercial case to use, run, modify (in a way that still complies with the Specification) and copy the Software to (a) generate, using one or more encoded pictures as inputs, a file complying with the Specification and including the one or more encoded pictures that were given as inputs; and/or (b) read a file complying with the Specification, resulting into one or more encoded pictures included in the file as outputs."

It is pretty clear from this reading that their patent grant is for non-commercial evaluation, testing and academic research only.

[1] https://github.com/nokiatech/heif/blob/master/LICENSE.TXT




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