adder

adder

Properties

GstCaps * caps Read / Write

Types and Values

struct GstAdder

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GstObject
            ╰── GstElement
                ╰── GstAdder

Implemented Interfaces

GstAdder implements GstChildProxy.

Description

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

The adder currently mixes all data received on the sinkpads as soon as possible without trying to synchronize the streams.

Check out the audiomixer element in gst-plugins-bad for a better-behaving audio mixing element: It will sync input streams correctly and also handle live inputs properly.

Example launch line

1
 
gst-launch-1.0 audiotestsrc freq=100 ! adder name=mix ! audioconvert ! autoaudiosink audiotestsrc freq=500 ! mix.
This pipeline produces two sine waves mixed together.

Synopsis

Element Information

plugin

 adder

author

 Thomas Vander Stichele <thomas at apestaart dot org>

class

 Generic/Audio

Element Pads

name

 sink_%u

direction

 sink

presence

 request

details

 audio/x-raw, format=(string){ S32LE, U32LE, S16LE, U16LE, S8, U8, F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string){ interleaved, non-interleaved }

name

 src

direction

 source

presence

 always

details

 audio/x-raw, format=(string){ S32LE, U32LE, S16LE, U16LE, S8, U8, F32LE, F64LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string){ interleaved, non-interleaved }

Functions

Types and Values

struct GstAdder

struct GstAdder;

The adder object structure.

Property Details

The “caps” property

  “caps”                     GstCaps *

Set target format for mixing (NULL means ANY). Setting this property takes a reference to the supplied GstCaps object.

Flags: Read / Write

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