# testsrcbin

This is a simple GstBin source that wraps audiotestsrc/videotestsrc following specification passed in the URI (it implements the GstURIHandler interface) in the form of `testbin://audio+video` or setting the "stream-types" property with the same format.

This element also provides GstStream and GstStreamCollection and thus the element is useful for testing the new playbin3 infrastructure.

## The `uri` format

`testbin://<stream1 definition>[+<stream2 definition>]`

With :

`<media-type>,<element-properties>,[caps=<media caps>]`

where:

- `<media-type>`: Adds a new source of type `<media-type>`. Supported values:
  - `video`: A videotestsrc element will be used
  - `audio`: An audiotestsrc will be used you can use it as many time as wanted to expose new streams.
- `<element-properties>`: `key=value` list of properties to be set on the source element. See videotestsrc properties for the video case and audiotestsrc properties for the audio case.
- `<media caps>`: Caps to be set in the capsfilter that follows source elements for example to force the video source to output a full HD stream, you can use `video/x-raw,width=1920,height=1080`.

Note that stream definitions are interpreted as serialized GstStructure.

## Examples pipeline:

### One audio stream with volume=0.5 and a white video stream in full HD at 30fps

    gst-launch-1.0 playbin3 uri="testbin://audio,volume=0.5+video,pattern=white,caps=[video/x-raw,width=1920,height=1080,framerate=30/1]"

### Single full HD stream

    gst-launch-1.0 playbin3 uri="testbin://video,pattern=green,caps=[video/x-raw,width=1920,height=1080,framerate=30/1]"

### Two audio streams

    gst-launch-1.0 playbin3 uri="testbin://audio+audio"

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstBin
                        ╰──testsrcbin

## Implemented interfaces

    GstChildProxy
    GstURIHandler

## Factory details

Authors: – Erik Walthinsen ,Wim Taymans

Classification: – `Generic/Bin`

Rank – none

Plugin – debugutilsbad

Package – GStreamer Bad Plug-ins

## Pad Templates

### `audio_src_%u`

    audio/x-raw(ANY):

Presence – sometimes

Direction – src

Object type – GstPad

### `video_src_%u`

    video/x-raw(ANY):

Presence – sometimes

Direction – src

Object type – GstPad

## Properties

### expose-sources-async

    “expose-sources-async” gboolean

Whether to expose sources at random time to simulate a source that is reading a file and exposing the srcpads later.

Flags : Read / Write

Default value : false

Since : 1.20

### stream-types

    “stream-types” gchararray

String describing the stream types to expose, eg. "video+audio".

Flags : Read / Write

Default value : NULL

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