webp is not proprietary. There is a patent grant https://groups.google.com/a/webmproject.org/g/webp-discuss/c/W4_j7Tlofv8 https://groups.google.com/a/webmprojec

webp is not proprietary. There is a patent grant https://groups.google.com/a/webmproject.org/g/webp-discuss/c/W4_j7Tlofv8 https://groups.google.com/a/webmproject.org/g/webp-discuss/c... and reference implementation is BSD-licensed.