opusdec - Man Page

decode audio in Opus format to Wave or raw PCM


opusdec [ -hV ] [ --quiet ] [ --rate Hz ] [ --force-stereo ] [ --gain dB ] [ --no-dither ] [ --float ] [ --force-wav ] [ --packet-loss pct ] [ --save-range file ] input.opus [ output.wav ]


opusdec decodes Opus URLs or files to uncompressed Wave or raw PCM.

In URLs, the file , http , and https schemes are supported unless HTTP support was disabled at build time.

If the input file is specified as - , then opusdec will read from stdin. Likewise, an output filename of - will cause output to be to stdout.

If no output is specified opusdec will attempt to play the audio in realtime if it supports audio playback on your system.


-h, ā€‰--help

Show help message

-V, ā€‰--version

Show version information


Suppresses program output

--rate n

Force decoding at sampling rate n Hz


Force decoding to stereo

--gain n

Adjust the output volume n dB, negative values make the signal quieter


Do not dither 16-bit output


Output 32-bit floating-point samples instead of 16-bit integer samples


Force including a Wave header on output (e.g. for non-wav extensions and stdout)

--packet-loss n

Simulate n % random Opus packet loss

--save-range file

Save check values for every frame to a file


Decode a file input.opus to output.wav

opusdec input.opus output.wav

Play a file input.opus

opusdec input.opus

Re-encode a high bitrate Opus file to a lower rate

opusdec --force-wav input.opus - | opusenc --bitrate 64 - output.opus

Play an http stream http://icecast.somwhere.org:8000/stream.opus on a system with pulseaudio
(press ctrl-c to quit)


Jean-Marc Valin <jmvalin@jmvalin.ca>
Gregory Maxwell <greg@xiph.org>


Opusdec does not currently reject all invalid files which it should reject. It also doesn't provide very helpful output for the corrupted files it does reject. Use opusinfo(1) for somewhat better diagnostics.

See Also

opusenc(1), opusinfo(1)

Referenced By

opusenc(1), opusinfo(1).

2012-08-31 Xiph.Org Foundation opus-tools