The Opus codec provides superior audio quality over codecs such as AAC, MP3 and Vorbis. Android has support for Opus since Android 5.0 (Lollipop). However, when I tried playing Opus files on My LG G4, it wouldn’t recognize the file as a media file at all. It turns out, that the default .opus extension is not recognized by Android. The workaround is to change the extension to .ogg. Generally speaking, this is technically correct, as most Opus streams are encapsulated by an Ogg container, however, .opus is the recommended extension (but apparently not for Android).
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I found that I had trouble getting tagging to work on Mac OS X with the ogg extension. I got my Android to recognize tags and play these files as follows: 1. converted to opus with .opus extension. 2. tagged in Kid3.
3. moved files onto Android phone. 4. renamed all the files with.ogg.
Then they all showed up in the Samsung Music player with all their tags.