fakevideosink

This element is the same as fakesink but will pretend to support various allocation meta API like GstVideoMeta in order to prevent memory copies. This is useful for throughput testing and testing zero-copy path while creating a new pipeline.

Example launch lines

 gst-launch-1.0 videotestsrc ! fakevideosink
 gst-launch-1.0 videotestsrc ! fpsdisplaysink text-overlay=false video-sink=fakevideosink

Since 1.14

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBin
                    ╰──fakevideosink

Implemented interfaces

GstChildProxy

Factory details

Authors: – Nicolas Dufresne

Classification: – Video/Sink

Rank – none

Plugin – debugutilsbad

Package – GStreamer Bad Plug-ins

Pad Templates

`sink`

video/x-raw(ANY):
         format: { DMA_DRM, A444_16LE, A444_16BE, AYUV64, RGBA64_LE, ARGB64, ARGB64_LE, BGRA64_LE, ABGR64_LE, RGBA64_BE, ARGB64_BE, BGRA64_BE, ABGR64_BE, A422_16LE, A422_16BE, A420_16LE, A420_16BE, A444_12LE, GBRA_12LE, A444_12BE, GBRA_12BE, Y412_LE, Y412_BE, A422_12LE, A422_12BE, A420_12LE, A420_12BE, A444_10LE, GBRA_10LE, A444_10BE, GBRA_10BE, A422_10LE, A422_10BE, A420_10LE, A420_10BE, BGR10A2_LE, RGB10A2_LE, Y410, A444, GBRA, AYUV, VUYA, RGBA, RBGA, ARGB, BGRA, ABGR, A422, A420, AV12, Y444_16LE, GBR_16LE, Y444_16BE, GBR_16BE, v216, P016_LE, P016_BE, Y444_12LE, GBR_12LE, Y444_12BE, GBR_12BE, I422_12LE, I422_12BE, Y212_LE, Y212_BE, I420_12LE, I420_12BE, P012_LE, P012_BE, Y444_10LE, GBR_10LE, Y444_10BE, GBR_10BE, r210, I422_10LE, I422_10BE, NV16_10LE32, Y210, UYVP, v210, I420_10LE, I420_10BE, P010_10LE, NV12_10LE40, NV12_10LE32, P010_10BE, MT2110R, MT2110T, NV12_10BE_8L128, NV12_10LE40_4L4, Y444, BGRP, GBR, RGBP, NV24, v308, IYU2, RGBx, xRGB, BGRx, xBGR, RGB, BGR, Y42B, NV16, NV61, YUY2, YVYU, UYVY, VYUY, I420, YV12, NV12, NV21, NV12_16L32S, NV12_32L32, NV12_4L4, NV12_64Z32, NV12_8L128, Y41B, IYU1, YUV9, YVU9, BGR16, RGB16, BGR15, RGB15, RGB8P, GRAY16_LE, GRAY16_BE, GRAY10_LE32, GRAY8 }
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

Signals

handoff

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

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

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

This signal gets emitted before unreffing the buffer.

Parameters:

fakevideosink –

the fakevideosink instance

buffer –

the buffer that just has been received

pad –

the pad that received it

udata –

No description available

Flags: Run Last

Since : 1.22

preroll-handoff

preroll_handoff_callback (GstElement * fakevideosink,
                          GstBuffer * buffer,
                          GstPad * pad,
                          gpointer udata)

def preroll_handoff_callback (fakevideosink, buffer, pad, udata):
    #python callback for the 'preroll-handoff' signal

function preroll_handoff_callback(fakevideosink: GstElement * fakevideosink, buffer: GstBuffer * buffer, pad: GstPad * pad, udata: gpointer udata): {
    // javascript callback for the 'preroll-handoff' signal
}

This signal gets emitted before unreffing the buffer.

Parameters:

fakevideosink –

the fakevideosink instance

buffer –

the buffer that just has been received

pad –

the pad that received it

udata –

No description available

Flags: Run Last

Since : 1.22

Properties

allocation-meta-flags

“allocation-meta-flags” Fake-video-sink-allocation-meta-flags *

Control the behaviour of the sink allocation query handler.

Flags : Read / Write

Default value : overlay-composition+crop

Since : 1.18

async

“async” gboolean

Go asynchronously to PAUSED

Flags : Read / Write

Default value : true

blocksize

“blocksize” guint

Size in bytes to pull per buffer (0 = default)

Flags : Read / Write

Default value : 4096

can-activate-pull

“can-activate-pull” gboolean

Can activate in pull mode

Flags : Read / Write

Default value : false

can-activate-push

“can-activate-push” gboolean

Can activate in push mode

Flags : Read / Write

Default value : true

drop-out-of-segment

“drop-out-of-segment” gboolean

Drop and don't render / hand off out-of-segment buffers

Flags : Read / Write

Default value : true

dump

“dump” gboolean

Dump buffer contents to stdout

Flags : Read / Write

Default value : false

enable-last-sample

“enable-last-sample” gboolean

Enable the last-sample property

Flags : Read / Write

Default value : true

last-message

“last-message” gchararray

The message describing current status

Flags : Read

Default value : NULL

last-sample

“last-sample” GstSample *

The last sample received in the sink

Flags : Read

max-bitrate

“max-bitrate” guint64

The maximum bits per second to render (0 = disabled)

Flags : Read / Write

Default value : 0

max-lateness

“max-lateness” gint64

Maximum number of nanoseconds that a buffer can be late before it is dropped (-1 unlimited)

Flags : Read / Write

Default value : 5000000

num-buffers

“num-buffers” gint

Number of buffers to accept going EOS

Flags : Read / Write

Default value : -1

processing-deadline

“processing-deadline” guint64

Maximum processing time for a buffer in nanoseconds

Flags : Read / Write

Default value : 15000000

qos

“qos” gboolean

Generate Quality-of-Service events upstream

Flags : Read / Write

Default value : true

render-delay

“render-delay” guint64

Additional render delay of the sink in nanoseconds

Flags : Read / Write

Default value : 0

signal-handoffs

“signal-handoffs” gboolean

Send a signal before unreffing the buffer

Flags : Read / Write

Default value : false

silent

“silent” gboolean

Don't produce last_message events

Flags : Read / Write

Default value : true

state-error

“state-error” Fake-video-sink-state-error *

Generate a state change error

Flags : Read / Write

Default value : none (0)

stats

“stats” GstStructure *

Sink Statistics

Flags : Read

Default value :

application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;

sync

“sync” gboolean

Sync on the clock

Flags : Read / Write

Default value : true

throttle-time

“throttle-time” guint64

The time to keep between rendered buffers (0 = disabled)

Flags : Read / Write

Default value : 0

ts-offset

“ts-offset” gint64

Timestamp offset in nanoseconds

Flags : Read / Write

Default value : 0

Named constants

Fake-video-sink-allocation-meta-flags

Extra flags to configure the behaviour of the sink.

Members

crop (0x00000001) – Expose the crop meta as supported

overlay-composition (0x00000002) – Expose the overlay composition meta as supported

Since : 1.18

Fake-video-sink-state-error

Proxy for GstFakeSinkError.

Members

none (0) – No state change errors

null-to-ready (1) – Fail state change from NULL to READY

ready-to-paused (2) – Fail state change from READY to PAUSED

paused-to-playing (3) – Fail state change from PAUSED to PLAYING

playing-to-paused (4) – Fail state change from PLAYING to PAUSED

paused-to-ready (5) – Fail state change from PAUSED to READY

ready-to-null (6) – Fail state change from READY to NULL

Since : 1.22

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