Opus-tools v0.1.10-80-g1a646c4 (using libopus 1.3-rc-15-g38fca4a2)
Built on August 27, 2018, GCC 7.3.0(32bit)/8.2.0(64bit)

https://git.xiph.org/?p=opus-tools.git;a=summary
https://git.xiph.org/?p=libopusenc.git;a=summary
https://git.xiph.org/?p=opus.git;a=summary
https://git.xiph.org/?p=opusfile.git;a=summary