Download patch
ref: f2b2f57fb540795814ef66e95eb7aaf1434e8e47 parent: e6b63eabaef2185b7c788d6cbb7df939328267c6 author: qwx <qwx@sciops.net> date: Sun Jan 12 11:24:00 EST 2020
add file-opus: ogg/opus detection, differentiation from ogg/vorbis