Upgrade to libvpx 1.15.2; many optimizations and bugfixes made in past 2 years

[Pentaphon]

Current libvpx is https://chromium.googlesource.com/webm/libvpx/+/refs/tags/v1.13.1 from 9/2023

Latest libvpx is https://chromium.googlesource.com/webm/libvpx/+/refs/tags/v1.15.2 from 1 month ago

[argorar]

That version isn't in the latest ffmpeg 7.1.1. You can download the latest git master branch build https://www.gyan.dev/ffmpeg/builds/ that contains libvpx v1.15.2 and help to test if is totally compatible with WebM for Lazys features. Your feedback will be useful to update it to all users.