wavpackenc

WavpackEnc encodes raw audio into a framed Wavpack stream. Wavpack is an open-source audio codec that features both lossless and lossy encoding.

Example launch line

 gst-launch-1.0 audiotestsrc num-buffers=500 ! audioconvert ! wavpackenc ! filesink location=sinewave.wv

This pipeline encodes audio from audiotestsrc into a Wavpack file. The audioconvert element is needed as the Wavpack encoder only accepts input with 32 bit width.

 gst-launch-1.0 cdda://1 ! audioconvert ! wavpackenc ! filesink location=track1.wv

This pipeline encodes audio from an audio CD into a Wavpack file using lossless encoding (the file output will be fairly large).

 gst-launch-1.0 cdda://1 ! audioconvert ! wavpackenc bitrate=128000 ! filesink location=track1.wv

This pipeline encodes audio from an audio CD into a Wavpack file using lossy encoding at a certain bitrate (the file will be fairly small).

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstAudioEncoder
                    ╰──wavpackenc

Implemented interfaces

Factory details

Authors: – Sebastian Dröge

Classification: – Codec/Encoder/Audio

Rank – none

Plugin – wavpack

Package – GStreamer Good Plug-ins

Pad Templates

sink

audio/x-raw:
         format: S32LE
         layout: interleaved
       channels: [ 1, 8 ]
           rate: [ 6000, 192000 ]

Presence – always

Direction – sink

Object type – GstPad

src

audio/x-wavpack:
          depth: [ 1, 32 ]
       channels: [ 1, 8 ]
           rate: [ 6000, 192000 ]
         framed: true

Presence – always

Direction – src

Object type – GstPad

wvcsrc

audio/x-wavpack-correction:
         framed: true

Presence – sometimes

Direction – src

Object type – GstPad

Properties

bitrate 

“bitrate” guint

Try to encode with this average bitrate (bits/sec). This enables lossy encoding, values smaller than 24000 disable it again.

Flags : Read / Write

Default value : 0

bits-per-sample 

“bits-per-sample” gdouble

Try to encode with this amount of bits per sample. This enables lossy encoding, values smaller than 2.0 disable it again.

Flags : Read / Write

Default value : 0

correction-mode 

“correction-mode” Wavpack-enc-correction-mode *

Use this mode for the correction stream. Only works in lossy mode!

Flags : Read / Write

Default value : off (0)

extra-processing 

“extra-processing” guint

Use better but slower filters for better compression/quality.

Flags : Read / Write

Default value : 0

joint-stereo-mode 

“joint-stereo-mode” Wavpack-enc-jsmode *

Use this joint-stereo mode.

Flags : Read / Write

Default value : auto (0)

md5 

“md5” gboolean

Store MD5 hash of raw samples within the file.

Flags : Read / Write

Default value : false

mode 

“mode” Wavpack-enc-mode *

Speed versus compression tradeoff.

Flags : Read / Write

Default value : normal (2)

Named constants

Wavpack-enc-correction-mode

Members

off (0) – Create no correction file
on (1) – Create correction file
optimized (2) – Create optimized correction file

Wavpack-enc-jsmode

Members

auto (0) – auto
leftright (1) – left/right
midside (2) – mid/side

Wavpack-enc-mode

Members

fast (1) – Fast Compression
normal (2) – Normal Compression
high (3) – High Compression
veryhigh (4) – Very High Compression

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