# GstVideoAggregator

VideoAggregator can accept AYUV, ARGB and BGRA video streams. For each of the requested sink pads it will compare the incoming geometry and framerate to define the output parameters. Indeed output video frames will have the geometry of the biggest incoming video stream and the framerate of the fastest incoming one.

VideoAggregator will do colorspace conversion.

Zorder for each input stream can be configured on the GstVideoAggregatorPad.

## GstVideoAggregator

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstAggregator
                        ╰──GstVideoAggregator

### Members

`aggregator` (GstAggregator) –
No description available
`info` (GstVideoInfo) –

The GstVideoInfo representing the currently set srcpad caps.

### Class structure

#### GstVideoAggregatorClass

### GstVideo.VideoAggregatorClass

## GstVideo.VideoAggregator

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Element
                    ╰──GstBase.Aggregator
                        ╰──GstVideo.VideoAggregator

### Members

`aggregator` (GstBase.Aggregator) –
No description available
`info` (GstVideo.VideoInfo) –

The GstVideo.VideoInfo representing the currently set srcpad caps.

## GstVideo.VideoAggregator

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Element
                    ╰──GstBase.Aggregator
                        ╰──GstVideo.VideoAggregator

### Members

`aggregator` (GstBase.Aggregator) –
No description available
`info` (GstVideo.VideoInfo) –

The GstVideo.VideoInfo representing the currently set srcpad caps.

### Methods

#### gst_video_aggregator_get_execution_task_pool

    GstTaskPool *
    gst_video_aggregator_get_execution_task_pool (GstVideoAggregator * vagg)

The returned GstTaskPool is used internally for performing parallel video format conversions/scaling/etc during the prepare_frame_start() process. Subclasses can add their own operation to perform using the returned GstTaskPool during aggregate_frames().

Parameters:

`vagg` –

the GstVideoAggregator

Returns ( [transfer: full]) –

the GstTaskPool that can be used by subclasses for performing concurrent operations

Since : 1.20

#### GstVideo.VideoAggregator.prototype.get_execution_task_pool

    function GstVideo.VideoAggregator.prototype.get_execution_task_pool(): {
        // javascript wrapper for 'gst_video_aggregator_get_execution_task_pool'
    }

The returned Gst.TaskPool is used internally for performing parallel video format conversions/scaling/etc during the vfunc_prepare_frame_start() process. Subclasses can add their own operation to perform using the returned Gst.TaskPool during vfunc_aggregate_frames().

Parameters:

`vagg` (GstVideo.VideoAggregator) –

the GstVideo.VideoAggregator

Returns (Gst.TaskPool) –

the Gst.TaskPool that can be used by subclasses for performing concurrent operations

Since : 1.20

#### GstVideo.VideoAggregator.get_execution_task_pool

    def GstVideo.VideoAggregator.get_execution_task_pool (self):
        #python wrapper for 'gst_video_aggregator_get_execution_task_pool'

The returned Gst.TaskPool is used internally for performing parallel video format conversions/scaling/etc during the do_prepare_frame_start() process. Subclasses can add their own operation to perform using the returned Gst.TaskPool during do_aggregate_frames().

Parameters:

`vagg` (GstVideo.VideoAggregator) –

the GstVideo.VideoAggregator

Returns (Gst.TaskPool) –

the Gst.TaskPool that can be used by subclasses for performing concurrent operations

Since : 1.20

### Virtual Methods

#### aggregate_frames

    GstFlowReturn
    aggregate_frames (GstVideoAggregator * videoaggregator,
                      GstBuffer * outbuffer)

Lets subclasses aggregate frames that are ready. Subclasses should iterate the GstElement.sinkpads and use the already mapped GstVideoFrame from gst_video_aggregator_pad_get_prepared_frame or directly use the GstBuffer from gst_video_aggregator_pad_get_current_buffer if it needs to map the buffer in a special way. The result of the aggregation should land in outbuffer.

Parameters:

`videoaggregator` –
No description available
`outbuffer` –
No description available
Returns –
No description available

#### vfunc_aggregate_frames

    function vfunc_aggregate_frames(videoaggregator: GstVideo.VideoAggregator, outbuffer: Gst.Buffer): {
        // javascript implementation of the 'aggregate_frames' virtual method
    }

Lets subclasses aggregate frames that are ready. Subclasses should iterate the GstElement.sinkpads and use the already mapped GstVideo.VideoFrame from GstVideo.VideoAggregatorPad.prototype.get_prepared_frame or directly use the Gst.Buffer from GstVideo.VideoAggregatorPad.prototype.get_current_buffer if it needs to map the buffer in a special way. The result of the aggregation should land in outbuffer.

Parameters:

`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`outbuffer` (Gst.Buffer) –
No description available
Returns (Gst.FlowReturn) –
No description available

#### do_aggregate_frames

    def do_aggregate_frames (videoaggregator, outbuffer):
        #python implementation of the 'aggregate_frames' virtual method

Lets subclasses aggregate frames that are ready. Subclasses should iterate the GstElement.sinkpads and use the already mapped GstVideo.VideoFrame from GstVideo.VideoAggregatorPad.get_prepared_frame or directly use the Gst.Buffer from GstVideo.VideoAggregatorPad.get_current_buffer if it needs to map the buffer in a special way. The result of the aggregation should land in outbuffer.

Parameters:

`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`outbuffer` (Gst.Buffer) –
No description available
Returns (Gst.FlowReturn) –
No description available

#### create_output_buffer

    GstFlowReturn
    create_output_buffer (GstVideoAggregator * videoaggregator,
                          GstBuffer ** outbuffer)

Optional. Lets subclasses provide a GstBuffer to be used as outbuffer of the aggregate_frames vmethod.

Parameters:

`videoaggregator` –
No description available
`outbuffer` –
No description available
Returns –
No description available

#### vfunc_create_output_buffer

    function vfunc_create_output_buffer(videoaggregator: GstVideo.VideoAggregator, outbuffer: Gst.Buffer): {
        // javascript implementation of the 'create_output_buffer' virtual method
    }

Optional. Lets subclasses provide a Gst.Buffer to be used as outbuffer of the aggregate_frames vmethod.

Parameters:

`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`outbuffer` (Gst.Buffer) –
No description available
Returns (Gst.FlowReturn) –
No description available

#### do_create_output_buffer

    def do_create_output_buffer (videoaggregator, outbuffer):
        #python implementation of the 'create_output_buffer' virtual method

Optional. Lets subclasses provide a Gst.Buffer to be used as outbuffer of the aggregate_frames vmethod.

Parameters:

`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`outbuffer` (Gst.Buffer) –
No description available
Returns (Gst.FlowReturn) –
No description available

#### find_best_format

    find_best_format (GstVideoAggregator * vagg,
                      GstCaps * downstream_caps,
                      GstVideoInfo * best_info,
                      gboolean * at_least_one_alpha)

Optional. Lets subclasses decide of the best common format to use.

Parameters:

`vagg` –
No description available
`downstream_caps` –
No description available
`best_info` –
No description available
`at_least_one_alpha` –
No description available

#### vfunc_find_best_format

    function vfunc_find_best_format(vagg: GstVideo.VideoAggregator, downstream_caps: Gst.Caps, best_info: GstVideo.VideoInfo, at_least_one_alpha: Number): {
        // javascript implementation of the 'find_best_format' virtual method
    }

Optional. Lets subclasses decide of the best common format to use.

Parameters:

`vagg` (GstVideo.VideoAggregator) –
No description available
`downstream_caps` (Gst.Caps) –
No description available
`best_info` (GstVideo.VideoInfo) –
No description available
`at_least_one_alpha` (Number) –
No description available

#### do_find_best_format

    def do_find_best_format (vagg, downstream_caps, best_info, at_least_one_alpha):
        #python implementation of the 'find_best_format' virtual method

Optional. Lets subclasses decide of the best common format to use.

Parameters:

`vagg` (GstVideo.VideoAggregator) –
No description available
`downstream_caps` (Gst.Caps) –
No description available
`best_info` (GstVideo.VideoInfo) –
No description available
`at_least_one_alpha` (bool) –
No description available

#### update_caps

    GstCaps *
    update_caps (GstVideoAggregator * videoaggregator,
                 GstCaps * caps)

Optional. Lets subclasses update the GstCaps representing the src pad caps before usage. Return NULL to indicate failure.

Parameters:

`videoaggregator` –
No description available
`caps` –
No description available
Returns –
No description available

#### vfunc_update_caps

    function vfunc_update_caps(videoaggregator: GstVideo.VideoAggregator, caps: Gst.Caps): {
        // javascript implementation of the 'update_caps' virtual method
    }

Optional. Lets subclasses update the Gst.Caps representing the src pad caps before usage. Return null to indicate failure.

Parameters:

`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`caps` (Gst.Caps) –
No description available
Returns (Gst.Caps) –
No description available

#### do_update_caps

    def do_update_caps (videoaggregator, caps):
        #python implementation of the 'update_caps' virtual method

Optional. Lets subclasses update the Gst.Caps representing the src pad caps before usage. Return None to indicate failure.

Parameters:

`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`caps` (Gst.Caps) –
No description available
Returns (Gst.Caps) –
No description available

## GstVideoAggregatorConvertPad

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstPad
                    ╰──GstAggregatorPad
                        ╰──GstVideoAggregatorPad
                            ╰──GstVideoAggregatorConvertPad
                                ╰──GstVideoAggregatorParallelConvertPad

An implementation of GstPad that can be used with GstVideoAggregator.

See GstVideoAggregator for more details.

### Class structure

#### GstVideoAggregatorConvertPadClass

##### Fields

`parent_class` (GstVideoAggregatorPadClass) –
No description available

### GstVideo.VideoAggregatorConvertPadClass

##### Attributes

`parent_class` (GstVideo.VideoAggregatorPadClass) –
No description available

### GstVideo.VideoAggregatorConvertPadClass

##### Attributes

`parent_class` (GstVideo.VideoAggregatorPadClass) –
No description available

## GstVideo.VideoAggregatorConvertPad

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Pad
                    ╰──GstBase.AggregatorPad
                        ╰──GstVideo.VideoAggregatorPad
                            ╰──GstVideo.VideoAggregatorConvertPad
                                ╰──GstVideo.VideoAggregatorParallelConvertPad

An implementation of GstPad that can be used with GstVideo.VideoAggregator.

See GstVideo.VideoAggregator for more details.

## GstVideo.VideoAggregatorConvertPad

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Pad
                    ╰──GstBase.AggregatorPad
                        ╰──GstVideo.VideoAggregatorPad
                            ╰──GstVideo.VideoAggregatorConvertPad
                                ╰──GstVideo.VideoAggregatorParallelConvertPad

An implementation of GstPad that can be used with GstVideo.VideoAggregator.

See GstVideo.VideoAggregator for more details.

### Methods

#### gst_video_aggregator_convert_pad_update_conversion_info

    gst_video_aggregator_convert_pad_update_conversion_info (GstVideoAggregatorConvertPad * pad)

Requests the pad to check and update the converter before the next usage to update for any changes that have happened.

Parameters:

`pad` –

a GstVideoAggregatorPad

#### GstVideo.VideoAggregatorConvertPad.prototype.update_conversion_info

    function GstVideo.VideoAggregatorConvertPad.prototype.update_conversion_info(): {
        // javascript wrapper for 'gst_video_aggregator_convert_pad_update_conversion_info'
    }

Requests the pad to check and update the converter before the next usage to update for any changes that have happened.

Parameters:

`pad` (GstVideo.VideoAggregatorConvertPad) –

a GstVideo.VideoAggregatorPad

#### GstVideo.VideoAggregatorConvertPad.update_conversion_info

    def GstVideo.VideoAggregatorConvertPad.update_conversion_info (self):
        #python wrapper for 'gst_video_aggregator_convert_pad_update_conversion_info'

Requests the pad to check and update the converter before the next usage to update for any changes that have happened.

Parameters:

`pad` (GstVideo.VideoAggregatorConvertPad) –

a GstVideo.VideoAggregatorPad

### Properties

#### converter-config

    “converter-config” GstStructure *

Flags : Read / Write

#### converter-config

    “converter-config” Gst.Structure

Flags : Read / Write

#### converter_config

    “self.props.converter_config” Gst.Structure

Flags : Read / Write

### Virtual Methods

#### create_conversion_info

    create_conversion_info (GstVideoAggregatorConvertPad * pad,
                            GstVideoAggregator * agg,
                            GstVideoInfo * conversion_info)

Parameters:

`pad` –
No description available
`agg` –
No description available
`conversion_info` –
No description available

#### vfunc_create_conversion_info

    function vfunc_create_conversion_info(pad: GstVideo.VideoAggregatorConvertPad, agg: GstVideo.VideoAggregator, conversion_info: GstVideo.VideoInfo): {
        // javascript implementation of the 'create_conversion_info' virtual method
    }

Parameters:

`pad` (GstVideo.VideoAggregatorConvertPad) –
No description available
`agg` (GstVideo.VideoAggregator) –
No description available
`conversion_info` (GstVideo.VideoInfo) –
No description available

#### do_create_conversion_info

    def do_create_conversion_info (pad, agg, conversion_info):
        #python implementation of the 'create_conversion_info' virtual method

Parameters:

`pad` (GstVideo.VideoAggregatorConvertPad) –
No description available
`agg` (GstVideo.VideoAggregator) –
No description available
`conversion_info` (GstVideo.VideoInfo) –
No description available

## GstVideoAggregatorPad

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstPad
                    ╰──GstAggregatorPad
                        ╰──GstVideoAggregatorPad
                            ╰──GstVideoAggregatorConvertPad

### Members

`parent` (GstAggregatorPad) –
No description available
`info` (GstVideoInfo) –

The GstVideoInfo currently set on the pad

### Class structure

#### GstVideoAggregatorPadClass

##### Fields

`parent_class` (GstAggregatorPadClass) –
No description available
`_gst_reserved` (gpointer *) –
No description available

### GstVideo.VideoAggregatorPadClass

##### Attributes

`parent_class` (GstBase.AggregatorPadClass) –
No description available
`_gst_reserved` ([ Object ]) –
No description available

### GstVideo.VideoAggregatorPadClass

##### Attributes

`parent_class` (GstBase.AggregatorPadClass) –
No description available
`_gst_reserved` ([ object ]) –
No description available

## GstVideo.VideoAggregatorPad

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Pad
                    ╰──GstBase.AggregatorPad
                        ╰──GstVideo.VideoAggregatorPad
                            ╰──GstVideo.VideoAggregatorConvertPad

### Members

`parent` (GstBase.AggregatorPad) –
No description available
`info` (GstVideo.VideoInfo) –

The GstVideo.VideoInfo currently set on the pad

## GstVideo.VideoAggregatorPad

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Pad
                    ╰──GstBase.AggregatorPad
                        ╰──GstVideo.VideoAggregatorPad
                            ╰──GstVideo.VideoAggregatorConvertPad

### Members

`parent` (GstBase.AggregatorPad) –
No description available
`info` (GstVideo.VideoInfo) –

The GstVideo.VideoInfo currently set on the pad

### Methods

#### gst_video_aggregator_pad_get_current_buffer

    GstBuffer *
    gst_video_aggregator_pad_get_current_buffer (GstVideoAggregatorPad * pad)

Returns the currently queued buffer that is going to be used for the current output frame.

This must only be called from the aggregate_frames virtual method, or from the prepare_frame virtual method of the aggregator pads.

The return value is only valid until aggregate_frames or prepare_frame returns.

Parameters:

`pad` –

a GstVideoAggregatorPad

Returns ( [transfer: none]) –

The currently queued buffer

#### GstVideo.VideoAggregatorPad.prototype.get_current_buffer

    function GstVideo.VideoAggregatorPad.prototype.get_current_buffer(): {
        // javascript wrapper for 'gst_video_aggregator_pad_get_current_buffer'
    }

Returns the currently queued buffer that is going to be used for the current output frame.

This must only be called from the vfunc_aggregate_frames virtual method, or from the vfunc_prepare_frame virtual method of the aggregator pads.

The return value is only valid until vfunc_aggregate_frames or vfunc_prepare_frame returns.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

Returns (Gst.Buffer) –

The currently queued buffer

#### GstVideo.VideoAggregatorPad.get_current_buffer

    def GstVideo.VideoAggregatorPad.get_current_buffer (self):
        #python wrapper for 'gst_video_aggregator_pad_get_current_buffer'

Returns the currently queued buffer that is going to be used for the current output frame.

This must only be called from the do_aggregate_frames virtual method, or from the do_prepare_frame virtual method of the aggregator pads.

The return value is only valid until do_aggregate_frames or do_prepare_frame returns.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

Returns (Gst.Buffer) –

The currently queued buffer

#### gst_video_aggregator_pad_get_prepared_frame

    GstVideoFrame *
    gst_video_aggregator_pad_get_prepared_frame (GstVideoAggregatorPad * pad)

Returns the currently prepared video frame that has to be aggregated into the current output frame.

This must only be called from the aggregate_frames virtual method, or from the prepare_frame virtual method of the aggregator pads.

The return value is only valid until aggregate_frames or prepare_frame returns.

Parameters:

`pad` –

a GstVideoAggregatorPad

Returns ( [transfer: none]) –

The currently prepared video frame

#### GstVideo.VideoAggregatorPad.prototype.get_prepared_frame

    function GstVideo.VideoAggregatorPad.prototype.get_prepared_frame(): {
        // javascript wrapper for 'gst_video_aggregator_pad_get_prepared_frame'
    }

Returns the currently prepared video frame that has to be aggregated into the current output frame.

This must only be called from the vfunc_aggregate_frames virtual method, or from the vfunc_prepare_frame virtual method of the aggregator pads.

The return value is only valid until vfunc_aggregate_frames or vfunc_prepare_frame returns.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

Returns (GstVideo.VideoFrame) –

The currently prepared video frame

#### GstVideo.VideoAggregatorPad.get_prepared_frame

    def GstVideo.VideoAggregatorPad.get_prepared_frame (self):
        #python wrapper for 'gst_video_aggregator_pad_get_prepared_frame'

Returns the currently prepared video frame that has to be aggregated into the current output frame.

This must only be called from the do_aggregate_frames virtual method, or from the do_prepare_frame virtual method of the aggregator pads.

The return value is only valid until do_aggregate_frames or do_prepare_frame returns.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

Returns (GstVideo.VideoFrame) –

The currently prepared video frame

#### gst_video_aggregator_pad_has_current_buffer

    gboolean
    gst_video_aggregator_pad_has_current_buffer (GstVideoAggregatorPad * pad)

Checks if the pad currently has a buffer queued that is going to be used for the current output frame.

This must only be called from the aggregate_frames virtual method, or from the prepare_frame virtual method of the aggregator pads.

Parameters:

`pad` –

a GstVideoAggregatorPad

Returns –

TRUE if the pad has currently a buffer queued

#### GstVideo.VideoAggregatorPad.prototype.has_current_buffer

    function GstVideo.VideoAggregatorPad.prototype.has_current_buffer(): {
        // javascript wrapper for 'gst_video_aggregator_pad_has_current_buffer'
    }

Checks if the pad currently has a buffer queued that is going to be used for the current output frame.

This must only be called from the vfunc_aggregate_frames virtual method, or from the vfunc_prepare_frame virtual method of the aggregator pads.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

Returns (Number) –

true if the pad has currently a buffer queued

#### GstVideo.VideoAggregatorPad.has_current_buffer

    def GstVideo.VideoAggregatorPad.has_current_buffer (self):
        #python wrapper for 'gst_video_aggregator_pad_has_current_buffer'

Checks if the pad currently has a buffer queued that is going to be used for the current output frame.

This must only be called from the do_aggregate_frames virtual method, or from the do_prepare_frame virtual method of the aggregator pads.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

Returns (bool) –

True if the pad has currently a buffer queued

#### gst_video_aggregator_pad_set_needs_alpha

    gst_video_aggregator_pad_set_needs_alpha (GstVideoAggregatorPad * pad,
                                              gboolean needs_alpha)

Allows selecting that this pad requires an output format with alpha

Parameters:

`pad` –

a GstVideoAggregatorPad

`needs_alpha` –

TRUE if this pad requires alpha output

#### GstVideo.VideoAggregatorPad.prototype.set_needs_alpha

    function GstVideo.VideoAggregatorPad.prototype.set_needs_alpha(needs_alpha: Number): {
        // javascript wrapper for 'gst_video_aggregator_pad_set_needs_alpha'
    }

Allows selecting that this pad requires an output format with alpha

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

`needs_alpha` (Number) –

true if this pad requires alpha output

#### GstVideo.VideoAggregatorPad.set_needs_alpha

    def GstVideo.VideoAggregatorPad.set_needs_alpha (self, needs_alpha):
        #python wrapper for 'gst_video_aggregator_pad_set_needs_alpha'

Allows selecting that this pad requires an output format with alpha

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

a GstVideo.VideoAggregatorPad

`needs_alpha` (bool) –

True if this pad requires alpha output

### Properties

#### max-last-buffer-repeat

    “max-last-buffer-repeat” guint64

Flags : Read / Write

#### max-last-buffer-repeat

    “max-last-buffer-repeat” Number

Flags : Read / Write

#### max_last_buffer_repeat

    “self.props.max_last_buffer_repeat” int

Flags : Read / Write

#### repeat-after-eos

    “repeat-after-eos” gboolean

Flags : Read / Write

#### repeat-after-eos

    “repeat-after-eos” Number

Flags : Read / Write

#### repeat_after_eos

    “self.props.repeat_after_eos” bool

Flags : Read / Write

#### zorder

    “zorder” guint

Flags : Read / Write

#### zorder

    “zorder” Number

Flags : Read / Write

#### zorder

    “self.props.zorder” int

Flags : Read / Write

### Virtual Methods

#### clean_frame

    clean_frame (GstVideoAggregatorPad * pad,
                 GstVideoAggregator * videoaggregator,
                 GstVideoFrame * prepared_frame)

clean the frame previously prepared in prepare_frame

Parameters:

`pad` –
No description available
`videoaggregator` –
No description available
`prepared_frame` –
No description available

#### vfunc_clean_frame

    function vfunc_clean_frame(pad: GstVideo.VideoAggregatorPad, videoaggregator: GstVideo.VideoAggregator, prepared_frame: GstVideo.VideoFrame): {
        // javascript implementation of the 'clean_frame' virtual method
    }

clean the frame previously prepared in prepare_frame

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –
No description available
`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`prepared_frame` (GstVideo.VideoFrame) –
No description available

#### do_clean_frame

    def do_clean_frame (pad, videoaggregator, prepared_frame):
        #python implementation of the 'clean_frame' virtual method

clean the frame previously prepared in prepare_frame

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –
No description available
`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`prepared_frame` (GstVideo.VideoFrame) –
No description available

#### prepare_frame

    gboolean
    prepare_frame (GstVideoAggregatorPad * pad,
                   GstVideoAggregator * videoaggregator,
                   GstBuffer * buffer,
                   GstVideoFrame * prepared_frame)

Prepare the frame from the pad buffer and sets it to prepared_frame. Implementations should always return TRUE. Returning FALSE will cease iteration over subsequent pads.

Parameters:

`pad` –
No description available
`videoaggregator` –
No description available
`buffer` –
No description available
`prepared_frame` –
No description available
Returns –
No description available

#### vfunc_prepare_frame

    function vfunc_prepare_frame(pad: GstVideo.VideoAggregatorPad, videoaggregator: GstVideo.VideoAggregator, buffer: Gst.Buffer, prepared_frame: GstVideo.VideoFrame): {
        // javascript implementation of the 'prepare_frame' virtual method
    }

Prepare the frame from the pad buffer and sets it to prepared_frame. Implementations should always return TRUE. Returning FALSE will cease iteration over subsequent pads.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –
No description available
`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`buffer` (Gst.Buffer) –
No description available
`prepared_frame` (GstVideo.VideoFrame) –
No description available
Returns (Number) –
No description available

#### do_prepare_frame

    def do_prepare_frame (pad, videoaggregator, buffer, prepared_frame):
        #python implementation of the 'prepare_frame' virtual method

Prepare the frame from the pad buffer and sets it to prepared_frame. Implementations should always return TRUE. Returning FALSE will cease iteration over subsequent pads.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –
No description available
`videoaggregator` (GstVideo.VideoAggregator) –
No description available
`buffer` (Gst.Buffer) –
No description available
`prepared_frame` (GstVideo.VideoFrame) –
No description available
Returns (bool) –
No description available

#### prepare_frame_finish

    prepare_frame_finish (GstVideoAggregatorPad * pad,
                          GstVideoAggregator * videoaggregator,
                          GstVideoFrame * prepared_frame)

Finish preparing prepared_frame.

If overriden, `prepare_frame_start` must also be overriden.

Parameters:

`pad` –

the GstVideoAggregatorPad

`videoaggregator` –

the parent GstVideoAggregator

`prepared_frame` –

the GstVideoFrame to prepare into

Since : 1.20

#### vfunc_prepare_frame_finish

    function vfunc_prepare_frame_finish(pad: GstVideo.VideoAggregatorPad, videoaggregator: GstVideo.VideoAggregator, prepared_frame: GstVideo.VideoFrame): {
        // javascript implementation of the 'prepare_frame_finish' virtual method
    }

Finish preparing prepared_frame.

If overriden, `prepare_frame_start` must also be overriden.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

the GstVideo.VideoAggregatorPad

`videoaggregator` (GstVideo.VideoAggregator) –

the parent GstVideo.VideoAggregator

`prepared_frame` (GstVideo.VideoFrame) –

the GstVideo.VideoFrame to prepare into

Since : 1.20

#### do_prepare_frame_finish

    def do_prepare_frame_finish (pad, videoaggregator, prepared_frame):
        #python implementation of the 'prepare_frame_finish' virtual method

Finish preparing prepared_frame.

If overriden, `prepare_frame_start` must also be overriden.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

the GstVideo.VideoAggregatorPad

`videoaggregator` (GstVideo.VideoAggregator) –

the parent GstVideo.VideoAggregator

`prepared_frame` (GstVideo.VideoFrame) –

the GstVideo.VideoFrame to prepare into

Since : 1.20

#### prepare_frame_start

    prepare_frame_start (GstVideoAggregatorPad * pad,
                         GstVideoAggregator * videoaggregator,
                         GstBuffer * buffer,
                         GstVideoFrame * prepared_frame)

Begin preparing the frame from the pad buffer and sets it to prepared_frame.

If overriden, `prepare_frame_finish` must also be overriden.

Parameters:

`pad` –

the GstVideoAggregatorPad

`videoaggregator` –

the parent GstVideoAggregator

`buffer` –

the input GstBuffer to prepare

`prepared_frame` –

the GstVideoFrame to prepare into

Since : 1.20

#### vfunc_prepare_frame_start

    function vfunc_prepare_frame_start(pad: GstVideo.VideoAggregatorPad, videoaggregator: GstVideo.VideoAggregator, buffer: Gst.Buffer, prepared_frame: GstVideo.VideoFrame): {
        // javascript implementation of the 'prepare_frame_start' virtual method
    }

Begin preparing the frame from the pad buffer and sets it to prepared_frame.

If overriden, `prepare_frame_finish` must also be overriden.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

the GstVideo.VideoAggregatorPad

`videoaggregator` (GstVideo.VideoAggregator) –

the parent GstVideo.VideoAggregator

`buffer` (Gst.Buffer) –

the input Gst.Buffer to prepare

`prepared_frame` (GstVideo.VideoFrame) –

the GstVideo.VideoFrame to prepare into

Since : 1.20

#### do_prepare_frame_start

    def do_prepare_frame_start (pad, videoaggregator, buffer, prepared_frame):
        #python implementation of the 'prepare_frame_start' virtual method

Begin preparing the frame from the pad buffer and sets it to prepared_frame.

If overriden, `prepare_frame_finish` must also be overriden.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –

the GstVideo.VideoAggregatorPad

`videoaggregator` (GstVideo.VideoAggregator) –

the parent GstVideo.VideoAggregator

`buffer` (Gst.Buffer) –

the input Gst.Buffer to prepare

`prepared_frame` (GstVideo.VideoFrame) –

the GstVideo.VideoFrame to prepare into

Since : 1.20

#### update_conversion_info

    update_conversion_info (GstVideoAggregatorPad * pad)

Called when either the input or output formats have changed.

Parameters:

`pad` –
No description available

#### vfunc_update_conversion_info

    function vfunc_update_conversion_info(pad: GstVideo.VideoAggregatorPad): {
        // javascript implementation of the 'update_conversion_info' virtual method
    }

Called when either the input or output formats have changed.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –
No description available

#### do_update_conversion_info

    def do_update_conversion_info (pad):
        #python implementation of the 'update_conversion_info' virtual method

Called when either the input or output formats have changed.

Parameters:

`pad` (GstVideo.VideoAggregatorPad) –
No description available

## GstVideoAggregatorParallelConvertPad

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstPad
                    ╰──GstAggregatorPad
                        ╰──GstVideoAggregatorPad
                            ╰──GstVideoAggregatorConvertPad
                                ╰──GstVideoAggregatorParallelConvertPad

An implementation of GstPad that can be used with GstVideoAggregator.

See GstVideoAggregator for more details.

### Members

`parent_instance` (GstVideoAggregatorConvertPad) –
No description available

### Class structure

#### GstVideoAggregatorParallelConvertPadClass

##### Fields

`parent_class` (GstVideoAggregatorConvertPadClass) –
No description available

### GstVideo.VideoAggregatorParallelConvertPadClass

##### Attributes

`parent_class` (GstVideo.VideoAggregatorConvertPadClass) –
No description available

### GstVideo.VideoAggregatorParallelConvertPadClass

##### Attributes

`parent_class` (GstVideo.VideoAggregatorConvertPadClass) –
No description available

## GstVideo.VideoAggregatorParallelConvertPad

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Pad
                    ╰──GstBase.AggregatorPad
                        ╰──GstVideo.VideoAggregatorPad
                            ╰──GstVideo.VideoAggregatorConvertPad
                                ╰──GstVideo.VideoAggregatorParallelConvertPad

An implementation of GstPad that can be used with GstVideo.VideoAggregator.

See GstVideo.VideoAggregator for more details.

### Members

`parent_instance` (GstVideo.VideoAggregatorConvertPad) –
No description available

## GstVideo.VideoAggregatorParallelConvertPad

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Pad
                    ╰──GstBase.AggregatorPad
                        ╰──GstVideo.VideoAggregatorPad
                            ╰──GstVideo.VideoAggregatorConvertPad
                                ╰──GstVideo.VideoAggregatorParallelConvertPad

An implementation of GstPad that can be used with GstVideo.VideoAggregator.

See GstVideo.VideoAggregator for more details.

### Members

`parent_instance` (GstVideo.VideoAggregatorConvertPad) –
No description available

## Function Macros

### GST_VIDEO_AGGREGATOR_CAST

    #define GST_VIDEO_AGGREGATOR_CAST(obj) ((GstVideoAggregator *)(obj))

### GST_VIDEO_AGGREGATOR_PAD_CAST

    #define GST_VIDEO_AGGREGATOR_PAD_CAST(obj) ((GstVideoAggregatorPad *)(obj))

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