-https://bitbucket.org/multicoreware/x265/downloads/x265_3.0.tar.gz
-http://ffmpeg.org/releases/ffmpeg-4.1.tar.gz
-https://github.com/webmproject/libvpx/releases/tag/v1.7.0
+https://bitbucket.org/multicoreware/x265/downloads/x265_3.1.2.tar.gz
+https://ffmpeg.org/releases/ffmpeg-4.2.tar.bz2
+https://github.com/webmproject/libvpx/archive/v1.8.1.tar.gz
+https://code.videolan.org/videolan/dav1d/-/archive/0.4.0/dav1d-0.4.0.tar.gz