Quoting from the README:
> Up to v0.8.7, SVT-AV1 is licensed under the BSD-2-clause license and
> the Alliance for Open Media Patent License 1.0. See LICENSE and
> PATENTS for details. Starting from v0.9, SVT-AV1 is licensed under
> the BSD-3-clause clear license and the Alliance for Open Media
> Patent License 1.0. See LICENSE and PATENTS for details.