|  |  |  | GStreamer Good Plugins 0.10 Plugins Reference Manual |  | 
|---|---|---|---|---|
| Top | Description | Object Hierarchy | Properties | ||||
GObject +----GstObject +----GstElement +----GstBaseTransform +----GstAudioFilter +----GstAudioDynamic
"characteristics" GstAudioDynamicCharacteristics : Read / Write "mode" GstAudioDynamicMode : Read / Write "ratio" gfloat : Read / Write "threshold" gfloat : Read / Write
This element can act as a compressor or expander. A compressor changes the amplitude of all samples above a specific threshold with a specific ratio, a expander does the same for all samples below a specific threshold. If soft-knee mode is selected the ratio is applied smoothly.
gst-launch audiotestsrc wave=saw ! audiodynamic characteristics=soft-knee mode=compressor threshold=0.5 rate=0.5 ! alsasink gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiodynamic characteristics=hard-knee mode=expander threshold=0.2 rate=4.0 ! alsasink gst-launch audiotestsrc wave=saw ! audioconvert ! audiodynamic ! audioconvert ! alsasink
| plugin | audiofx | 
| author | Sebastian Dröge <slomo@circular-chaos.org> | 
| class | Filter/Effect/Audio | 
| name | sink | 
| direction | sink | 
| presence | always | 
| details | audio/x-raw-int, depth=(int)16, width=(int)16, endianness=(int)1234, signed=(boolean)true, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ] | 
| audio/x-raw-float, width=(int)32, endianness=(int)1234, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ] | 
| name | src | 
| direction | source | 
| presence | always | 
| details | audio/x-raw-int, depth=(int)16, width=(int)16, endianness=(int)1234, signed=(boolean)true, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ] | 
| audio/x-raw-float, width=(int)32, endianness=(int)1234, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ] | 
"characteristics" property"characteristics" GstAudioDynamicCharacteristics : Read / Write
Selects whether the ratio should be applied smooth (soft-knee) or hard (hard-knee).
Default value: Hard Knee (default)
"mode" property"mode" GstAudioDynamicMode : Read / Write
Selects whether the filter should work on loud samples (compressor) orquiet samples (expander).
Default value: Compressor (default)
"ratio" property"ratio" gfloat : Read / Write
Ratio that should be applied.
Allowed values: >= 0
Default value: 1
"threshold" property"threshold" gfloat : Read / Write
Threshold until the filter is activated.
Allowed values: [0,1]
Default value: 0