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<title>audiomixer: GStreamer Base Plugins 1.0 Plugins Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Plugins Reference Manual">
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<link rel="up" href="ch01.html" title="gst-plugins-base Elements">
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<link rel="prev" href="gst-plugins-base-plugins-audiointerleave.html" title="audiointerleave">
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<link rel="next" href="gst-plugins-base-plugins-audiorate.html" title="audiorate">
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Top |
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Description |
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Object Hierarchy |
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Implemented Interfaces
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audiomixer
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audiomixer
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Types and Values
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struct
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GstAudioMixer
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Object Hierarchy
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GObject
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╰── GInitiallyUnowned
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╰── GstObject
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╰── GstElement
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╰── GstAggregator
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╰── GstAudioAggregator
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╰── GstAudioMixer
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Implemented Interfaces
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GstAudioMixer implements
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GstChildProxy.
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Description
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The audiomixer allows to mix several streams into one by adding the data.
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Mixed data is clamped to the min/max values of the data format.
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Unlike the adder element audiomixer properly synchronises all input streams
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and also handles live inputs such as capture sources or RTP properly.
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The audiomixer element can accept any sort of raw audio data, it will
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be converted to the target format if necessary, with the exception
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of the sample rate, which has to be identical to either what downstream
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expects, or the sample rate of the first configured pad. Use a capsfilter
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after the audiomixer element if you want to precisely control the format
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that comes out of the audiomixer, which supports changing the format of
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its output while playing.
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If you want to control the manner in which incoming data gets converted,
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see the “converter-config” property, which will let
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you for example change the way in which channels may get remapped.
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The input pads are from a GstPad subclass and have additional
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properties to mute each pad individually and set the volume:
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"mute": Whether to mute the pad or not (gboolean)
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"volume": The volume of the pad, between 0.0 and 10.0 (gdouble)
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Example launch line
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1
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gst-launch-1.0 audiotestsrc freq=100 ! audiomixer name=mix ! audioconvert ! alsasink audiotestsrc freq=500 ! mix.
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This pipeline produces two sine waves mixed together.
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Synopsis
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Element Information
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plugin
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audiomixer
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author
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Sebastian Dröge <sebastian@centricular.com>
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class
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Generic/Audio
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Element Pads
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name
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sink_%u
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direction
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sink
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presence
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request
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details
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audio/x-raw, format=(string){ S8, U8, S16LE, S16BE, U16LE, U16BE, S24_32LE, S24_32BE, U24_32LE, U24_32BE, S32LE, S32BE, U32LE, U32BE, S24LE, S24BE, U24LE, U24BE, S20LE, S20BE, U20LE, U20BE, S18LE, S18BE, U18LE, U18BE, F32LE, F32BE, F64LE, F64BE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved
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name
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src
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direction
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source
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presence
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always
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details
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audio/x-raw, format=(string){ S32LE, U32LE, S16LE, U16LE, S8, U8, F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved
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Functions
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Types and Values
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struct GstAudioMixer
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struct GstAudioMixer;
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The audiomixer object structure.
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Generated by GTK-Doc V1.28
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