effects/avfilter/avfilter_dcshift.xml

0001 <?xml version="1.0"?>
0002 <!DOCTYPE kpartgui>
0003 <effect tag="avfilter.dcshift" id="avfilter.dcshift" type="audio">
0004     <name>DC shift</name>
0005     <description>Apply a DC shift to the audio.
0006 This can be useful to remove a DC offset (caused perhaps by a hardware problem in the recording chain) from the audio.
0007 The effect of a DC offset is reduced headroom and hence volume. The astats filter can be used to determine if a signal has a DC offset.</description>
0008     <author>libavfilter</author>
0009     <parameter type="constant" name="av.shift" default="0" min="-1" max="1" decimals="3">
0010         <name>DC shift</name>
0011         <comment>Set the DC shift, allowed range is [-1, 1]. It indicates the amount to shift the audio.</comment>
0012     </parameter>
0013     <parameter type="constant" name="av.limitergain" default="0" min="0" max="1" decimals="3">
0014         <name>Limiter gain</name>
0015         <comment>Optional. It should have a value much less than 1 (e.g. 0.05 or 0.02) and is used to prevent clipping.</comment>
0016     </parameter>
0017 </effect>