voaacenc

AAC audio encoder based on vo-aacenc library.

vo-aacenc library source file

Example launch line

 gst-launch-1.0 filesrc location=abc.wav ! wavparse ! audioresample ! audioconvert ! voaacenc ! filesink location=abc.aac

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstAudioEncoder
                    ╰──voaacenc

Implemented interfaces

Factory details

Authors: – Kan Hu

Classification: – Codec/Encoder/Audio

Rank – secondary

Plugin – voaacenc

Package – GStreamer Bad 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, (int)64000, (int)88200, (int)96000 }
       channels: 1
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, (int)64000, (int)88200, (int)96000 }
       channels: 2
   channel-mask: 0x0000000000000003

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, (int)64000, (int)88200, (int)96000 }
       channels: [ 1, 2 ]
  stream-format: { (string)adts, (string)raw }
   base-profile: lc

Presence – always

Direction – src

Object type – GstPad

Properties

bitrate 

“bitrate” gint

Target Audio Bitrate (bits per second)

Flags : Read / Write

Default value : 128000

hard-resync 

“hard-resync” gboolean

Perform clipping and sample flushing upon discontinuity

Flags : Read / Write

Default value : false

mark-granule 

“mark-granule” gboolean

Apply granule semantics to buffer metadata (implies perfect-timestamp)

Flags : Read

Default value : false

perfect-timestamp 

“perfect-timestamp” gboolean

Favour perfect timestamps over tracking upstream timestamps

Flags : Read / Write

Default value : false

tolerance 

“tolerance” gint64

Consider discontinuity if timestamp jitter/imperfection exceeds tolerance (ns)

Flags : Read / Write

Default value : 40000000

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