# opusenc

This element encodes raw audio to OPUS.

## Example pipelines

     gst-launch-1.0 -v audiotestsrc wave=sine num-buffers=100 ! audioconvert ! opusenc ! oggmux ! filesink location=sine.ogg

Encode a test sine signal to Ogg/OPUS.

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstAudioEncoder
                        ╰──opusenc

## Implemented interfaces

    GstPreset
    GstTagSetter

## Factory details

Authors: – Vincent Penquerc'h

Classification: – `Codec/Encoder/Audio`

Rank – primary

Plugin – opus

Package – GStreamer Base Plug-ins

## Pad Templates

### `sink`

    audio/x-raw:
             format: { F32LE, S16LE }
             layout: interleaved
               rate: 48000
           channels: [ 1, 255 ]
    audio/x-raw:
             format: { F32LE, S16LE }
             layout: interleaved
               rate: { (int)48000, (int)24000, (int)16000, (int)12000, (int)8000 }
           channels: [ 1, 255 ]

Presence – always

Direction – sink

Object type – GstPad

### `src`

    audio/x-opus:

Presence – always

Direction – src

Object type – GstPad

## Properties

### audio-type

    “audio-type” Opus-enc-audio-type *

What type of audio to optimize for

Flags : Read / Write

Default value : generic (2049)

### bandwidth

    “bandwidth” Opus-enc-bandwidth *

Audio Band Width

Flags : Read / Write

Default value : fullband (1105)

### bitrate

    “bitrate” gint

Specify an encoding bit-rate (in bps).

Flags : Read / Write

Default value : 64000

### bitrate-type

    “bitrate-type” Opus-enc-bitrate-type *

Bitrate type

Flags : Read / Write

Default value : constrained-vbr (2)

### complexity

    “complexity” gint

Complexity

Flags : Read / Write

Default value : 10

### dtx

    “dtx” gboolean

DTX

Flags : Read / Write

Default value : false

### frame-size

    “frame-size” Opus-enc-frame-size *

The duration of an audio frame, in ms

Flags : Read / Write

Default value : 20 (20)

### inband-fec

    “inband-fec” gboolean

Enable in-band forward error correction (use in combination with the packet-loss-percentage property)

Flags : Read / Write

Default value : false

### max-payload-size

    “max-payload-size” guint

Maximum payload size in bytes

Flags : Read / Write

Default value : 4000

### packet-loss-percentage

    “packet-loss-percentage” gint

Packet loss percentage

Flags : Read / Write

Default value : 0

### qext

    “qext” gboolean

Enable quality extensions.

Warning: This will hurt audio quality unless operating at a very high bitrate.

Flags : Read / Write

Default value : false

Since : 1.30

## Named constants

### Opus-enc-audio-type

#### Members

`generic` (2049) – Generic audio
`voice` (2048) – Voice
`restricted-lowdelay` (2051) – Restricted low delay

### Opus-enc-bandwidth

#### Members

`narrowband` (1101) – Narrow band
`mediumband` (1102) – Medium band
`wideband` (1103) – Wide band
`superwideband` (1104) – Super wide band
`fullband` (1105) – Full band
`auto` (-1000) – Auto

### Opus-enc-bitrate-type

#### Members

`cbr` (0) – CBR
`vbr` (1) – VBR
`constrained-vbr` (2) – Constrained VBR

### Opus-enc-frame-size

#### Members

`2.5` (2) – 2.5
`5` (5) – 5
`10` (10) – 10
`20` (20) – 20
`40` (40) – 40
`60` (60) – 60

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