Usage: opusenc  [options]input_file output_file.opus

Encode audio using Opus.
The input format can be Wave, AIFF, FLAC, Ogg/FLAC, or raw PCM.

input_file can be:
  filename.wav      file
  -                 stdin

output_file can be:
  filename.opus     compressed file
  -                 stdout

General options:
-h, --help         Show this help
-V, --version      Show version information
--help-picture     Show help on attaching album art
--quiet            Enable quiet mode

Encoding options:
--bitrate n.nnn    Set target bitrate in kbit/s (6-256/channel)
--vbr              Use variable bitrate encoding (default)
--cvbr             Use constrained variable bitrate encoding
--hard-cbr         Use hard constant bitrate encoding
--music            Tune low bitrates for music (override automatic detection)
--speech           Tune low bitrates for speech (override automatic detection)
--comp n           Set encoding complexity (0-10, default: 10 (slowest))
--framesize n      Set maximum frame size in milliseconds
                      (2.5, 5, 10, 20, 40, 60, default: 20)
--expect-loss n    Set expected packet loss in percent (default: 0)
--downmix-mono     Downmix to mono
--downmix-stereo   Downmix to stereo (if >2 channels)
--no-phase-inv     Disable use of phase inversion for intensity stereo
--max-delay n      Set maximum container delay in milliseconds
                      (0-1000, default: 1000)

Metadata options:
--title title      Set track title
--artist artist    Set artist or author, may be used multiple times
--album album      Set album or collection
--genre genre      Set genre, may be used multiple times
--date YYYY-MM-DD  Set date of track (YYYY, YYYY-MM, or YYYY-MM-DD)
--tracknumber n    Set track number
--comment tag=val  Add the given string as an extra comment
                      This may be used multiple times
--picture file     Attach album art (see --help-picture)
                      This may be used multiple times
--padding n        Reserve n extra bytes for metadata (default: 512)
--discard-comments Don't keep metadata when transcoding
--discard-pictures Don't keep pictures when transcoding

Input options:
--raw              Interpret input as raw PCM data without headers
--raw-float        Interpret input as raw float data without headers
--raw-bits n       Set bits/sample for raw input (default: 16; 32 for float)
--raw-rate n       Set sampling rate for raw input (default: 48000)
--raw-chan n       Set number of channels for raw input (default: 2)
--raw-endianness n 1 for big endian, 0 for little (default: 0)
--ignorelength     Ignore the data length in Wave headers

Diagnostic options:
--serial n         Force use of a specific stream serial number
--save-range file  Save check values for every frame to a file
--set-ctl-int x=y  Pass the encoder control x with value y (advanced)
                      Preface with s: to direct the ctl to multistream s
                      This may be used multiple times