Types and Values

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstElement
                ╰── GstAggregator
                    ╰── GstAudioAggregator
                        ╰── GstAudioMixer

Implemented Interfaces

GstAudioMixer implements GstChildProxy.

Description

The audiomixer allows to mix several streams into one by adding the data. Mixed data is clamped to the min/max values of the data format.

Unlike the adder element audiomixer properly synchronises all input streams and also handles live inputs such as capture sources or RTP properly.

The audiomixer element can accept any sort of raw audio data, it will be converted to the target format if necessary, with the exception of the sample rate, which has to be identical to either what downstream expects, or the sample rate of the first configured pad. Use a capsfilter after the audiomixer element if you want to precisely control the format that comes out of the audiomixer, which supports changing the format of its output while playing.

If you want to control the manner in which incoming data gets converted, see the “converter-config” property, which will let you for example change the way in which channels may get remapped.

The input pads are from a GstPad subclass and have additional properties to mute each pad individually and set the volume:

1

gst-launch-1.0 audiotestsrc freq=100 ! audiomixer name=mix ! audioconvert ! alsasink audiotestsrc freq=500 ! mix.

Functions

Types and Values

struct GstAudioMixer;