twolame

twolame — High-quality free MP2 encoder

Synopsis

                    GstTwoLame;

Object Hierarchy

  GObject
   +----GstObject
         +----GstElement
               +----GstTwoLame

Implemented Interfaces

GstTwoLame implements GstPreset.

Properties

  "ath-level"                gfloat                : Read / Write
  "bitrate"                  gint                  : Read / Write
  "copyright"                gboolean              : Read / Write
  "emphasis"                 GstTwoLameEmphasis    : Read / Write
  "energy-level-extension"   gboolean              : Read / Write
  "error-protection"         gboolean              : Read / Write
  "mode"                     GstTwoLameMode        : Read / Write
  "original"                 gboolean              : Read / Write
  "padding"                  GstTwoLamePadding     : Read / Write
  "psymodel"                 gint                  : Read / Write
  "quick-mode"               gboolean              : Read / Write
  "quick-mode-count"         gint                  : Read / Write
  "vbr"                      gboolean              : Read / Write
  "vbr-level"                gfloat                : Read / Write
  "vbr-max-bitrate"          gint                  : Read / Write

Description

This element encodes raw integer audio into an MPEG-1 layer 2 (MP2) stream.

Example pipelines

1
gst-launch -v audiotestsrc wave=sine num-buffers=100 ! audioconvert ! twolame ! filesink location=sine.mp2
Encode a test sine signal to MP2.
1
gst-launch -v alsasrc ! audioconvert ! twolame bitrate=192 ! filesink location=alsasrc.mp2
Record from a sound card using ALSA and encode to MP2
1
gst-launch -v filesrc location=music.wav ! decodebin ! audioconvert ! audioresample ! twolame bitrate=192 ! id3v2mux ! filesink location=music.mp2
Transcode from a .wav file to MP2 (the id3v2mux element is optional)
1
gst-launch -v cdda://5 ! audioconvert ! twolame bitrate=192 ! filesink location=track5.mp2
Encode Audio CD track 5 to MP2

Details

GstTwoLame

typedef struct _GstTwoLame GstTwoLame;

Opaque data structure.

Property Details

The "ath-level" property

  "ath-level"                gfloat                : Read / Write

ATH Level in dB.

Default value: 0


The "bitrate" property

  "bitrate"                  gint                  : Read / Write

Bitrate in kbit/sec (8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 192, 224, 256, 320, 384).

Allowed values: [8,384]

Default value: 192


The "copyright" property

  "copyright"                gboolean              : Read / Write

Mark as copyright.

Default value: FALSE


The "emphasis" property

  "emphasis"                 GstTwoLameEmphasis    : Read / Write

Pre-emphasis to apply to the decoded audio.

Default value: No emphasis


The "energy-level-extension" property

  "energy-level-extension"   gboolean              : Read / Write

Write peak PCM level to each frame.

Default value: FALSE


The "error-protection" property

  "error-protection"         gboolean              : Read / Write

Adds checksum to every frame.

Default value: FALSE


The "mode" property

  "mode"                     GstTwoLameMode        : Read / Write

Encoding mode.

Default value: Joint Stereo


The "original" property

  "original"                 gboolean              : Read / Write

Mark as original.

Default value: TRUE


The "padding" property

  "padding"                  GstTwoLamePadding     : Read / Write

Padding type.

Default value: No Padding


The "psymodel" property

  "psymodel"                 gint                  : Read / Write

Psychoacoustic model used to encode the audio.

Allowed values: [G_MAXULONG,4]

Default value: 3


The "quick-mode" property

  "quick-mode"               gboolean              : Read / Write

Calculate Psymodel every frames.

Default value: FALSE


The "quick-mode-count" property

  "quick-mode-count"         gint                  : Read / Write

Calculate Psymodel every n frames.

Allowed values: >= 0

Default value: 10


The "vbr" property

  "vbr"                      gboolean              : Read / Write

Enable variable bitrate mode.

Default value: FALSE


The "vbr-level" property

  "vbr-level"                gfloat                : Read / Write

VBR Level.

Allowed values: [-10,10]

Default value: 5


The "vbr-max-bitrate" property

  "vbr-max-bitrate"          gint                  : Read / Write

Specify maximum VBR bitrate (0=off, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 192, 224, 256, 320, 384).

Allowed values: [0,384]

Default value: 0

See Also

mad, lame