taglib/taglib — pull request #354 by TsudaKageyu (2014-03-10 00:50:13+00:00)
Title: opus: Estimate the bitrate if possible

Based on Michael Pyne's diff posted in the taglib-devel mailing list, found at:
http://mail.kde.org/pipermail/taglib-devel/2014-March/002645.html