atenc

AudioToolbox based encoder.

Example launch line

 gst-launch-1.0 -v audiotestsrc ! atenc ! mp4mux ! filesink location=test.m4a

Encodes audio from audiotestsrc and writes it to a file.

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstAudioEncoder
                    ╰──atenc

Implemented interfaces

Factory details

Authors: – Piotr Brzeziński

Classification: – Coder/Encoder/Audio/Converter

Rank – primary

Plugin – osxaudio

Package – GStreamer Good Plug-ins

Pad Templates

sink

audio/x-raw:
         format: S16LE
         layout: interleaved
           rate: { (int)8000, (int)11025, (int)12000, (int)16000, (int)22050, (int)24000, (int)32000, (int)44100, (int)48000 }
       channels: [ 1, 8 ]

Presence – always

Direction – sink

Object type – GstPad

src

audio/mpeg:
    mpegversion: 4
           rate: { (int)8000, (int)11025, (int)12000, (int)16000, (int)22050, (int)24000, (int)32000, (int)44100, (int)48000 }
       channels: [ 1, 8 ]
  stream-format: raw
        profile: lc
         framed: true

Presence – always

Direction – src

Object type – GstPad

Properties

bitrate 

“bitrate” guint

Target output bitrate in bps, for CBR and LTA rate control modes.

Flags : Read / Write

Default value : 0

Since : 1.26

rate-control 

“rate-control” Atenc-rate-control *

Rate control mode to be applied by the encoder. CBR and LTA modes use the bitrate property, VBR uses the vbr-quality property. Constrained VBR determines the bitrate/quality automatically based on the input signal.

Flags : Read / Write

Default value : cbr (0)

Since : 1.26

vbr-quality 

“vbr-quality” guint

Sound quality setting for VBR encoding.

Flags : Read / Write

Default value : 65

Since : 1.26

Named constants

Atenc-rate-control

Members

cbr (0) – Constant bitrate
lta (1) – Long-term-average bitrate
cvbr (2) – Constrained variable bitrate
vbr (3) – Variable bitrate

Since : 1.26

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