fakesrc

The fakesrc element is a multipurpose element that can generate a wide range of buffers and can operate in various scheduling modes.

It is mostly used as a testing element, one trivial example for testing basic GStreamer core functionality is:

Example launch line

 gst-launch-1.0 -v fakesrc num-buffers=5 ! fakesink

This pipeline will push 5 empty buffers to the fakesink element and then sends an EOS.

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseSrc
                    ╰──fakesrc

Factory details

Authors: – Erik Walthinsen , Wim Taymans

Classification: – Source

Rank – none

Plugin – coreelements

Package – GStreamer

Pad Templates

`src`

ANY

Presence – always

Direction – src

Object type – GstPad

Signals

handoff

handoff_callback (GstElement * fakesrc,
                  GstBuffer * buffer,
                  GstPad * pad,
                  gpointer udata)

def handoff_callback (fakesrc, buffer, pad, udata):
    #python callback for the 'handoff' signal

function handoff_callback(fakesrc: GstElement * fakesrc, buffer: GstBuffer * buffer, pad: GstPad * pad, udata: gpointer udata): {
    // javascript callback for the 'handoff' signal
}

This signal gets emitted before sending the buffer.

Parameters:

fakesrc –

the fakesrc instance

buffer –

the buffer that will be pushed

pad –

the pad that will sent it

udata –

No description available

Flags: Run Last

Properties

can-activate-pull

“can-activate-pull” gboolean

Can activate in pull mode

Flags : Read / Write / Construct

Default value : true

can-activate-push

“can-activate-push” gboolean

Can activate in push mode

Flags : Read / Write / Construct

Default value : true

data

“data” Fake-src-data-type *

Data allocation method

Flags : Read / Write

Default value : allocate (1)

datarate

“datarate” gint

Timestamps buffers with number of bytes per second (0 = none)

Flags : Read / Write

Default value : 0

dump

“dump” gboolean

Dump buffer contents to stdout

Flags : Read / Write

Default value : false

filltype

“filltype” Fake-src-fill-type *

How to fill the buffer, if at all

Flags : Read / Write

Default value : nothing (1)

format

“format” GstFormat *

Set the format of the newsegment events to produce.

Flags : Read / Write

Default value : bytes (2)

is-live

“is-live” gboolean

True if the element cannot produce data in PAUSED

Flags : Read / Write / Construct

Default value : false

last-message

“last-message” gchararray

The last status message

Flags : Read

Default value : NULL

parentsize

“parentsize” gint

Size of parent buffer for sub-buffered allocation

Flags : Read / Write

Default value : 40960

pattern

“pattern” gchararray

Set the pattern (unused)

Flags : Read / Write

Default value : NULL

signal-handoffs

“signal-handoffs” gboolean

Send a signal before pushing the buffer

Flags : Read / Write

Default value : false

silent

“silent” gboolean

Don't produce last_message events

Flags : Read / Write

Default value : true

sizemax

“sizemax” gint

Maximum buffer size

Flags : Read / Write

Default value : 4096

sizemin

“sizemin” gint

Minimum buffer size

Flags : Read / Write

Default value : 0

sizetype

“sizetype” Fake-src-size-type *

How to determine buffer sizes

Flags : Read / Write

Default value : empty (1)

sync

“sync” gboolean

Sync to the clock to the datarate

Flags : Read / Write

Default value : false

Named constants

Fake-src-data-type

The different ways buffers are allocated.

Members

allocate (1) – Allocate data

subbuffer (2) – Subbuffer data

Fake-src-fill-type

The different ways of filling the buffers.

Members

nothing (1) – Leave data as malloced

zero (2) – Fill buffers with zeros

random (3) – Fill buffers with random data

pattern (4) – Fill buffers with pattern 0x00 -> 0xff

pattern-span (5) – Fill buffers with pattern 0x00 -> 0xff that spans buffers

Fake-src-size-type

The different size of the allocated buffers.

Members

empty (1) – Send empty buffers

fixed (2) – Fixed size buffers (sizemax sized)

random (3) – Random sized buffers (sizemin <= size <= sizemax)

The results of the search are