adder: GStreamer Base Plugins 1.0 Plugins Reference Manual

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

adder

Properties

Types and Values

Object Hierarchy

Implemented Interfaces

Description

Example launch line

Synopsis

Element Information

Element Pads

Functions

Types and Values

struct GstAdder

Property Details

The “caps” property

The `“caps”` property