faac

faac — Free MPEG-2/4 AAC encoder

Synopsis

                    GstFaac;

Object Hierarchy

  GObject
   +----GstObject
         +----GstElement
               +----GstFaac

Implemented Interfaces

GstFaac implements GstPreset.

Properties

  "bitrate"                  gint                  : Read / Write
  "midside"                  gboolean              : Read / Write
  "outputformat"             GstFaacOutputFormat   : Read / Write
  "profile"                  GstFaacProfile        : Read / Write
  "shortctl"                 GstFaacShortCtl       : Read / Write
  "tns"                      gboolean              : Read / Write

Description

faac encodes raw audio to AAC (MPEG-4 part 3) streams.

The "outputformat" property determines whether or not the AAC data needs additional framing provided by a container (such as Matroska or Quicktime). This is required for raw data, whereas ADTS formatted AAC already provides framing and needs no container.

The "profile" property determines the AAC profile, where the default LC (Low Complexity) profile is most widely used, supported and suitable for general use. The other profiles are very rarely used and often not supported.

Example launch line

1
gst-launch audiotestsrc wave=sine num-buffers=100 ! audioconvert ! faac ! matroskamux ! filesink location=sine.mkv
Encode a sine beep as aac and write to matroska container.

Details

GstFaac

typedef struct _GstFaac GstFaac;

Property Details

The "bitrate" property

  "bitrate"                  gint                  : Read / Write

Bitrate in bits/sec.

Allowed values: [8000,320000]

Default value: 128000


The "midside" property

  "midside"                  gboolean              : Read / Write

Allow mid/side encoding.

Default value: TRUE


The "outputformat" property

  "outputformat"             GstFaacOutputFormat   : Read / Write

Format of output frames.

Default value: OUTPUTFORMAT_RAW


The "profile" property

  "profile"                  GstFaacProfile        : Read / Write

MPEG/AAC encoding profile.

Default value: LC


The "shortctl" property

  "shortctl"                 GstFaacShortCtl       : Read / Write

Block type encorcing.

Default value: SHORTCTL_NORMAL


The "tns" property

  "tns"                      gboolean              : Read / Write

Use temporal noise shaping.

Default value: FALSE

See Also

faad