If you have a large library of
FLAC encoded music and want to put it on a device with limited storage like an Android tablet or phone,
Opus is a great choice. Just make sure you have a player like VLC that can have support for the codec.
FLAC files to
Opus you will need
opus-tools installed. Then you can use the
for i in *.flac; do opusenc --bitrate 256 "$i" "$i.opus"; done
You can experiment with the bit rate if you like, 256 produces a quality that is probably indistinguishable from the
FLAC file for most people.
The resulting files will be in the format
file.flac.opus, if you would like to strip away the double file extension see this post.