If buffer duration is missing, it is parsed from the packet data. This is not foolproof, since Opus can change durations on the fly. https://bugzilla.gnome.org/show_bug.cgi?id=767826
If buffer duration is missing, it is parsed from the packet data. This is not foolproof, since Opus can change durations on the fly. https://bugzilla.gnome.org/show_bug.cgi?id=767826