# GstH264Decoder

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstVideoDecoder
                        ╰──GstH264Decoder

The opaque GstH264Decoder data structure.

### Class structure

#### GstH264DecoderClass

The opaque GstH264DecoderClass data structure.

##### Fields

`parent_class` (GstVideoDecoderClass) –
No description available

### GstCodecs.H264DecoderClass

The opaque GstCodecs.H264DecoderClass data structure.

##### Attributes

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

### GstCodecs.H264DecoderClass

The opaque GstCodecs.H264DecoderClass data structure.

##### Attributes

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

## GstCodecs.H264Decoder

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Element
                    ╰──GstVideo.VideoDecoder
                        ╰──GstCodecs.H264Decoder

The opaque GstCodecs.H264Decoder data structure.

## GstCodecs.H264Decoder

    GObject.Object
        ╰──GObject.InitiallyUnowned
            ╰──Gst.Object
                ╰──Gst.Element
                    ╰──GstVideo.VideoDecoder
                        ╰──GstCodecs.H264Decoder

The opaque GstCodecs.H264Decoder data structure.

### Methods

#### gst_h264_decoder_get_picture

    GstH264Picture *
    gst_h264_decoder_get_picture (GstH264Decoder * decoder,
                                  guint32 system_frame_number)

Retrive DPB and return a GstH264Picture corresponding to the system_frame_number

Parameters:

`decoder` –

a GstH264Decoder

`system_frame_number` –

a target system frame number of GstH264Picture

Returns ( [transfer: full]) –

a GstH264Picture if successful, or NULL otherwise

Since : 1.18

#### GstCodecs.H264Decoder.prototype.get_picture

    function GstCodecs.H264Decoder.prototype.get_picture(system_frame_number: Number): {
        // javascript wrapper for 'gst_h264_decoder_get_picture'
    }

Retrive DPB and return a GstCodecs.H264Picture corresponding to the system_frame_number

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`system_frame_number` (Number) –

a target system frame number of GstCodecs.H264Picture

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture if successful, or null otherwise

Since : 1.18

#### GstCodecs.H264Decoder.get_picture

    def GstCodecs.H264Decoder.get_picture (self, system_frame_number):
        #python wrapper for 'gst_h264_decoder_get_picture'

Retrive DPB and return a GstCodecs.H264Picture corresponding to the system_frame_number

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`system_frame_number` (int) –

a target system frame number of GstCodecs.H264Picture

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture if successful, or None otherwise

Since : 1.18

#### gst_h264_decoder_set_process_ref_pic_lists

    gst_h264_decoder_set_process_ref_pic_lists (GstH264Decoder * decoder,
                                                gboolean process)

Called to en/disable reference picture modification process.

Parameters:

`decoder` –

a GstH264Decoder

`process` –

whether subclass is requiring reference picture modification process

Since : 1.18

#### GstCodecs.H264Decoder.prototype.set_process_ref_pic_lists

    function GstCodecs.H264Decoder.prototype.set_process_ref_pic_lists(process: Number): {
        // javascript wrapper for 'gst_h264_decoder_set_process_ref_pic_lists'
    }

Called to en/disable reference picture modification process.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`process` (Number) –

whether subclass is requiring reference picture modification process

Since : 1.18

#### GstCodecs.H264Decoder.set_process_ref_pic_lists

    def GstCodecs.H264Decoder.set_process_ref_pic_lists (self, process):
        #python wrapper for 'gst_h264_decoder_set_process_ref_pic_lists'

Called to en/disable reference picture modification process.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`process` (bool) –

whether subclass is requiring reference picture modification process

Since : 1.18

### Virtual Methods

#### decode_slice

    gboolean
    decode_slice (GstH264Decoder * decoder,
                  GstH264Picture * picture,
                  GstH264Slice * slice,
                  GArray * ref_pic_list0,
                  GArray * ref_pic_list1)

Provides per slice data with parsed slice header and required raw bitstream for subclass to decode it. If gst_h264_decoder_set_process_ref_pic_lists is called with TRUE by the subclass, ref_pic_list0 and ref_pic_list1 are non-%NULL. In case of interlaced stream, ref_pic_list0 and ref_pic_list1 will contain only the first field of complementary reference field pair if currently being decoded picture is a frame picture. Subclasses might need to retrive the other field (i.e., the second field) of the picture if needed.

Parameters:

`decoder` –

a GstH264Decoder

`picture` ( [transfer: none]) –

a GstH264Picture

`slice` ( [transfer: none]) –

a GstH264Slice

`ref_pic_list0` –

(element-type GstH264Picture) (transfer none): an array of GstH264Picture pointers

`ref_pic_list1` –

(element-type GstH264Picture) (transfer none): an array of GstH264Picture pointers

Returns –
No description available

#### vfunc_decode_slice

    function vfunc_decode_slice(decoder: GstCodecs.H264Decoder, picture: GstCodecs.H264Picture, slice: GstCodecs.H264Slice, ref_pic_list0: [ GstCodecs.H264Picture ], ref_pic_list1: [ GstCodecs.H264Picture ]): {
        // javascript implementation of the 'decode_slice' virtual method
    }

Provides per slice data with parsed slice header and required raw bitstream for subclass to decode it. If GstCodecs.H264Decoder.prototype.set_process_ref_pic_lists is called with true by the subclass, ref_pic_list0 and ref_pic_list1 are non-%NULL. In case of interlaced stream, ref_pic_list0 and ref_pic_list1 will contain only the first field of complementary reference field pair if currently being decoded picture is a frame picture. Subclasses might need to retrive the other field (i.e., the second field) of the picture if needed.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`slice` (GstCodecs.H264Slice) –

a GstCodecs.H264Slice

`ref_pic_list0` ([ GstCodecs.H264Picture ]) –

(element-type GstH264Picture) (transfer none): an array of GstCodecs.H264Picture pointers

`ref_pic_list1` ([ GstCodecs.H264Picture ]) –

(element-type GstH264Picture) (transfer none): an array of GstCodecs.H264Picture pointers

Returns (Number) –
No description available

#### do_decode_slice

    def do_decode_slice (decoder, picture, slice, ref_pic_list0, ref_pic_list1):
        #python implementation of the 'decode_slice' virtual method

Provides per slice data with parsed slice header and required raw bitstream for subclass to decode it. If GstCodecs.H264Decoder.set_process_ref_pic_lists is called with True by the subclass, ref_pic_list0 and ref_pic_list1 are non-%NULL. In case of interlaced stream, ref_pic_list0 and ref_pic_list1 will contain only the first field of complementary reference field pair if currently being decoded picture is a frame picture. Subclasses might need to retrive the other field (i.e., the second field) of the picture if needed.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`slice` (GstCodecs.H264Slice) –

a GstCodecs.H264Slice

`ref_pic_list0` ([ GstCodecs.H264Picture ]) –

(element-type GstH264Picture) (transfer none): an array of GstCodecs.H264Picture pointers

`ref_pic_list1` ([ GstCodecs.H264Picture ]) –

(element-type GstH264Picture) (transfer none): an array of GstCodecs.H264Picture pointers

Returns (bool) –
No description available

#### end_picture

    gboolean
    end_picture (GstH264Decoder * decoder,
                 GstH264Picture * picture)

Optional. Called per one GstH264Picture to notify subclass to finish decoding process for the GstH264Picture

Parameters:

`decoder` –

a GstH264Decoder

`picture` ( [transfer: none]) –

a GstH264Picture

Returns –
No description available

#### vfunc_end_picture

    function vfunc_end_picture(decoder: GstCodecs.H264Decoder, picture: GstCodecs.H264Picture): {
        // javascript implementation of the 'end_picture' virtual method
    }

Optional. Called per one GstCodecs.H264Picture to notify subclass to finish decoding process for the GstCodecs.H264Picture

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (Number) –
No description available

#### do_end_picture

    def do_end_picture (decoder, picture):
        #python implementation of the 'end_picture' virtual method

Optional. Called per one GstCodecs.H264Picture to notify subclass to finish decoding process for the GstCodecs.H264Picture

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (bool) –
No description available

#### get_preferred_output_delay

    guint
    get_preferred_output_delay (GstH264Decoder * decoder,
                                gboolean live)

Optional. Called by baseclass to query whether delaying output is preferred by subclass or not.

Parameters:

`decoder` –

a GstH264Decoder

`live` –

whether upstream is live or not

Returns –

the number of perferred delayed output frame

Since : 1.20

#### vfunc_get_preferred_output_delay

    function vfunc_get_preferred_output_delay(decoder: GstCodecs.H264Decoder, live: Number): {
        // javascript implementation of the 'get_preferred_output_delay' virtual method
    }

Optional. Called by baseclass to query whether delaying output is preferred by subclass or not.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`live` (Number) –

whether upstream is live or not

Returns (Number) –

the number of perferred delayed output frame

Since : 1.20

#### do_get_preferred_output_delay

    def do_get_preferred_output_delay (decoder, live):
        #python implementation of the 'get_preferred_output_delay' virtual method

Optional. Called by baseclass to query whether delaying output is preferred by subclass or not.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`live` (bool) –

whether upstream is live or not

Returns (int) –

the number of perferred delayed output frame

Since : 1.20

#### new_field_picture

    gboolean
    new_field_picture (GstH264Decoder * decoder,
                       const GstH264Picture * first_field,
                       GstH264Picture * second_field)

Called when a new field picture is created for interlaced field picture. Subclass can attach implementation specific user data on second_field via gst_h264_picture_set_user_data

Parameters:

`decoder` –

a GstH264Decoder

`first_field` ( [transfer: none]) –

the first field GstH264Picture already decoded

`second_field` ( [transfer: none]) –

a GstH264Picture for the second field

Returns –
No description available

Since : 1.20

#### vfunc_new_field_picture

    function vfunc_new_field_picture(decoder: GstCodecs.H264Decoder, first_field: GstCodecs.H264Picture, second_field: GstCodecs.H264Picture): {
        // javascript implementation of the 'new_field_picture' virtual method
    }

Called when a new field picture is created for interlaced field picture. Subclass can attach implementation specific user data on second_field via GstCodecs.H264Picture.prototype.set_user_data

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`first_field` (GstCodecs.H264Picture) –

the first field GstCodecs.H264Picture already decoded

`second_field` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture for the second field

Returns (Number) –
No description available

Since : 1.20

#### do_new_field_picture

    def do_new_field_picture (decoder, first_field, second_field):
        #python implementation of the 'new_field_picture' virtual method

Called when a new field picture is created for interlaced field picture. Subclass can attach implementation specific user data on second_field via GstCodecs.H264Picture.set_user_data

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`first_field` (GstCodecs.H264Picture) –

the first field GstCodecs.H264Picture already decoded

`second_field` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture for the second field

Returns (bool) –
No description available

Since : 1.20

#### new_picture

    gboolean
    new_picture (GstH264Decoder * decoder,
                 GstVideoCodecFrame * frame,
                 GstH264Picture * picture)

Optional. Called whenever new GstH264Picture is created. Subclass can set implementation specific user data on the GstH264Picture via gst_h264_picture_set_user_data

Parameters:

`decoder` –

a GstH264Decoder

`frame` ( [transfer: none]) –

a GstVideoCodecFrame

`picture` ( [transfer: none]) –

a GstH264Picture

Returns –
No description available

#### vfunc_new_picture

    function vfunc_new_picture(decoder: GstCodecs.H264Decoder, frame: GstVideo.VideoCodecFrame, picture: GstCodecs.H264Picture): {
        // javascript implementation of the 'new_picture' virtual method
    }

Optional. Called whenever new GstCodecs.H264Picture is created. Subclass can set implementation specific user data on the GstCodecs.H264Picture via GstCodecs.H264Picture.prototype.set_user_data

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`frame` (GstVideo.VideoCodecFrame) –

a GstVideo.VideoCodecFrame

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (Number) –
No description available

#### do_new_picture

    def do_new_picture (decoder, frame, picture):
        #python implementation of the 'new_picture' virtual method

Optional. Called whenever new GstCodecs.H264Picture is created. Subclass can set implementation specific user data on the GstCodecs.H264Picture via GstCodecs.H264Picture.set_user_data

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`frame` (GstVideo.VideoCodecFrame) –

a GstVideo.VideoCodecFrame

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (bool) –
No description available

#### new_sequence

    gboolean
    new_sequence (GstH264Decoder * decoder,
                  const GstH264SPS * sps,
                  gint max_dpb_size)

Notifies subclass of SPS update

Parameters:

`decoder` –

a GstH264Decoder

`sps` –

a GstH264SPS

`max_dpb_size` –

the size of dpb including preferred output delay by subclass reported via get_preferred_output_delay method.

Returns –
No description available

#### output_picture

    GstFlowReturn
    output_picture (GstH264Decoder * decoder,
                    GstVideoCodecFrame * frame,
                    GstH264Picture * picture)

Called with a GstH264Picture which is required to be outputted. The GstVideoCodecFrame must be consumed by subclass.

Parameters:

`decoder` –

a GstH264Decoder

`frame` ( [transfer: full]) –

a GstVideoCodecFrame

`picture` ( [transfer: full]) –

a GstH264Picture

Returns –
No description available

#### vfunc_output_picture

    function vfunc_output_picture(decoder: GstCodecs.H264Decoder, frame: GstVideo.VideoCodecFrame, picture: GstCodecs.H264Picture): {
        // javascript implementation of the 'output_picture' virtual method
    }

Called with a GstCodecs.H264Picture which is required to be outputted. The GstVideo.VideoCodecFrame must be consumed by subclass.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`frame` (GstVideo.VideoCodecFrame) –

a GstVideo.VideoCodecFrame

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (Gst.FlowReturn) –
No description available

#### do_output_picture

    def do_output_picture (decoder, frame, picture):
        #python implementation of the 'output_picture' virtual method

Called with a GstCodecs.H264Picture which is required to be outputted. The GstVideo.VideoCodecFrame must be consumed by subclass.

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`frame` (GstVideo.VideoCodecFrame) –

a GstVideo.VideoCodecFrame

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (Gst.FlowReturn) –
No description available

#### start_picture

    gboolean
    start_picture (GstH264Decoder * decoder,
                   GstH264Picture * picture,
                   GstH264Slice * slice,
                   GstH264Dpb * dpb)

Optional. Called per one GstH264Picture to notify subclass to prepare decoding process for the GstH264Picture

Parameters:

`decoder` –

a GstH264Decoder

`picture` ( [transfer: none]) –

a GstH264Picture

`slice` ( [transfer: none]) –

a GstH264Slice

`dpb` ( [transfer: none]) –

a GstH264Dpb

Returns –
No description available

#### vfunc_start_picture

    function vfunc_start_picture(decoder: GstCodecs.H264Decoder, picture: GstCodecs.H264Picture, slice: GstCodecs.H264Slice, dpb: GstCodecs.H264Dpb): {
        // javascript implementation of the 'start_picture' virtual method
    }

Optional. Called per one GstCodecs.H264Picture to notify subclass to prepare decoding process for the GstCodecs.H264Picture

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`slice` (GstCodecs.H264Slice) –

a GstCodecs.H264Slice

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (Number) –
No description available

#### do_start_picture

    def do_start_picture (decoder, picture, slice, dpb):
        #python implementation of the 'start_picture' virtual method

Optional. Called per one GstCodecs.H264Picture to notify subclass to prepare decoding process for the GstCodecs.H264Picture

Parameters:

`decoder` (GstCodecs.H264Decoder) –

a GstCodecs.H264Decoder

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`slice` (GstCodecs.H264Slice) –

a GstCodecs.H264Slice

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (bool) –
No description available

## GstH264Dpb

## GstCodecs.H264Dpb

### Methods

#### gst_h264_dpb_add

    gst_h264_dpb_add (GstH264Dpb * dpb,
                      GstH264Picture * picture)

Store the picture

Parameters:

`dpb` –

a GstH264Dpb

`picture` ( [transfer: full]) –

a GstH264Picture

#### GstCodecs.H264Dpb.prototype.add

    function GstCodecs.H264Dpb.prototype.add(picture: GstCodecs.H264Picture): {
        // javascript wrapper for 'gst_h264_dpb_add'
    }

Store the picture

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

#### GstCodecs.H264Dpb.add

    def GstCodecs.H264Dpb.add (self, picture):
        #python wrapper for 'gst_h264_dpb_add'

Store the picture

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

#### gst_h264_dpb_bump

    GstH264Picture *
    gst_h264_dpb_bump (GstH264Dpb * dpb,
                       gboolean drain)

Perform bumping process as defined in C.4.5.3 "Bumping" process. If drain is TRUE, dpb will remove a GstH264Picture from internal array so that returned GstH264Picture could hold the last reference of it

Parameters:

`dpb` –

a GstH265Dpb

`drain` –

whether draining or not

Returns ( [nullable][transfer: full]) –

a GstH264Picture which is needed to be outputted

Since : 1.20

#### GstCodecs.H264Dpb.prototype.bump

    function GstCodecs.H264Dpb.prototype.bump(drain: Number): {
        // javascript wrapper for 'gst_h264_dpb_bump'
    }

Perform bumping process as defined in C.4.5.3 "Bumping" process. If drain is true, dpb will remove a GstCodecs.H264Picture from internal array so that returned GstCodecs.H264Picture could hold the last reference of it

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H265Dpb

`drain` (Number) –

whether draining or not

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture which is needed to be outputted

Since : 1.20

#### GstCodecs.H264Dpb.bump

    def GstCodecs.H264Dpb.bump (self, drain):
        #python wrapper for 'gst_h264_dpb_bump'

Perform bumping process as defined in C.4.5.3 "Bumping" process. If drain is True, dpb will remove a GstCodecs.H264Picture from internal array so that returned GstCodecs.H264Picture could hold the last reference of it

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H265Dpb

`drain` (bool) –

whether draining or not

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture which is needed to be outputted

Since : 1.20

#### gst_h264_dpb_clear

    gst_h264_dpb_clear (GstH264Dpb * dpb)

Clear all stored GstH264Picture

Parameters:

`dpb` –

a GstH264Dpb

#### GstCodecs.H264Dpb.prototype.clear

    function GstCodecs.H264Dpb.prototype.clear(): {
        // javascript wrapper for 'gst_h264_dpb_clear'
    }

Clear all stored GstCodecs.H264Picture

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

#### GstCodecs.H264Dpb.clear

    def GstCodecs.H264Dpb.clear (self):
        #python wrapper for 'gst_h264_dpb_clear'

Clear all stored GstCodecs.H264Picture

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

#### gst_h264_dpb_delete_unused

    gst_h264_dpb_delete_unused (GstH264Dpb * dpb)

Delete already outputted and not referenced all pictures from dpb

Parameters:

`dpb` –

a GstH264Dpb

#### GstCodecs.H264Dpb.prototype.delete_unused

    function GstCodecs.H264Dpb.prototype.delete_unused(): {
        // javascript wrapper for 'gst_h264_dpb_delete_unused'
    }

Delete already outputted and not referenced all pictures from dpb

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

#### GstCodecs.H264Dpb.delete_unused

    def GstCodecs.H264Dpb.delete_unused (self):
        #python wrapper for 'gst_h264_dpb_delete_unused'

Delete already outputted and not referenced all pictures from dpb

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

#### gst_h264_dpb_free

    gst_h264_dpb_free (GstH264Dpb * dpb)

Free the dpb

Parameters:

`dpb` –

a GstH264Dpb to free

#### GstCodecs.H264Dpb.prototype.free

    function GstCodecs.H264Dpb.prototype.free(): {
        // javascript wrapper for 'gst_h264_dpb_free'
    }

Free the dpb

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb to free

#### GstCodecs.H264Dpb.free

    def GstCodecs.H264Dpb.free (self):
        #python wrapper for 'gst_h264_dpb_free'

Free the dpb

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb to free

#### gst_h264_dpb_get_interlaced

    gboolean
    gst_h264_dpb_get_interlaced (GstH264Dpb * dpb)

Parameters:

`dpb` –

a GstH264Dpb

Returns –

TRUE if dpb is configured for interlaced stream

Since : 1.20

#### GstCodecs.H264Dpb.prototype.get_interlaced

    function GstCodecs.H264Dpb.prototype.get_interlaced(): {
        // javascript wrapper for 'gst_h264_dpb_get_interlaced'
    }

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (Number) –

true if dpb is configured for interlaced stream

Since : 1.20

#### GstCodecs.H264Dpb.get_interlaced

    def GstCodecs.H264Dpb.get_interlaced (self):
        #python wrapper for 'gst_h264_dpb_get_interlaced'

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (bool) –

True if dpb is configured for interlaced stream

Since : 1.20

#### gst_h264_dpb_get_long_ref_by_long_term_pic_num

    GstH264Picture *
    gst_h264_dpb_get_long_ref_by_long_term_pic_num (GstH264Dpb * dpb,
                                                    gint long_term_pic_num)

Find a long term reference picture which has matching long term picture number

Parameters:

`dpb` –

a GstH264Dpb

`long_term_pic_num` –

a long term picture number

Returns ( [nullable][transfer: none]) –

a GstH264Picture

Since : 1.20

#### GstCodecs.H264Dpb.prototype.get_long_ref_by_long_term_pic_num

    function GstCodecs.H264Dpb.prototype.get_long_ref_by_long_term_pic_num(long_term_pic_num: Number): {
        // javascript wrapper for 'gst_h264_dpb_get_long_ref_by_long_term_pic_num'
    }

Find a long term reference picture which has matching long term picture number

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`long_term_pic_num` (Number) –

a long term picture number

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Since : 1.20

#### GstCodecs.H264Dpb.get_long_ref_by_long_term_pic_num

    def GstCodecs.H264Dpb.get_long_ref_by_long_term_pic_num (self, long_term_pic_num):
        #python wrapper for 'gst_h264_dpb_get_long_ref_by_long_term_pic_num'

Find a long term reference picture which has matching long term picture number

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`long_term_pic_num` (int) –

a long term picture number

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Since : 1.20

#### gst_h264_dpb_get_lowest_frame_num_short_ref

    GstH264Picture *
    gst_h264_dpb_get_lowest_frame_num_short_ref (GstH264Dpb * dpb)

Find a short term reference picture which has the lowest frame_num_wrap

Parameters:

`dpb` –

a GstH264Dpb

Returns ( [transfer: full]) –

a GstH264Picture

#### GstCodecs.H264Dpb.prototype.get_lowest_frame_num_short_ref

    function GstCodecs.H264Dpb.prototype.get_lowest_frame_num_short_ref(): {
        // javascript wrapper for 'gst_h264_dpb_get_lowest_frame_num_short_ref'
    }

Find a short term reference picture which has the lowest frame_num_wrap

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

#### GstCodecs.H264Dpb.get_lowest_frame_num_short_ref

    def GstCodecs.H264Dpb.get_lowest_frame_num_short_ref (self):
        #python wrapper for 'gst_h264_dpb_get_lowest_frame_num_short_ref'

Find a short term reference picture which has the lowest frame_num_wrap

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

#### gst_h264_dpb_get_max_num_frames

    gint
    gst_h264_dpb_get_max_num_frames (GstH264Dpb * dpb)

Parameters:

`dpb` –

a GstH264Dpb

Returns –

the number of maximum frames

Since : 1.20

#### GstCodecs.H264Dpb.prototype.get_max_num_frames

    function GstCodecs.H264Dpb.prototype.get_max_num_frames(): {
        // javascript wrapper for 'gst_h264_dpb_get_max_num_frames'
    }

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (Number) –

the number of maximum frames

Since : 1.20

#### GstCodecs.H264Dpb.get_max_num_frames

    def GstCodecs.H264Dpb.get_max_num_frames (self):
        #python wrapper for 'gst_h264_dpb_get_max_num_frames'

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (int) –

the number of maximum frames

Since : 1.20

#### gst_h264_dpb_get_picture

    GstH264Picture *
    gst_h264_dpb_get_picture (GstH264Dpb * dpb,
                              guint32 system_frame_number)

Parameters:

`dpb` –

a GstH264Dpb system_frame_number The system frame number

`system_frame_number` –
No description available
Returns ( [transfer: full]) –

the picture identified with the specified system_frame_number, or NULL if DPB does not contain a GstH264Picture corresponding to the system_frame_number

Since : 1.18

#### GstCodecs.H264Dpb.prototype.get_picture

    function GstCodecs.H264Dpb.prototype.get_picture(system_frame_number: Number): {
        // javascript wrapper for 'gst_h264_dpb_get_picture'
    }

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb system_frame_number The system frame number

`system_frame_number` (Number) –
No description available
Returns (GstCodecs.H264Picture) –

the picture identified with the specified system_frame_number, or null if DPB does not contain a GstCodecs.H264Picture corresponding to the system_frame_number

Since : 1.18

#### GstCodecs.H264Dpb.get_picture

    def GstCodecs.H264Dpb.get_picture (self, system_frame_number):
        #python wrapper for 'gst_h264_dpb_get_picture'

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb system_frame_number The system frame number

`system_frame_number` (int) –
No description available
Returns (GstCodecs.H264Picture) –

the picture identified with the specified system_frame_number, or None if DPB does not contain a GstCodecs.H264Picture corresponding to the system_frame_number

Since : 1.18

#### gst_h264_dpb_get_pictures_all

    GArray *
    gst_h264_dpb_get_pictures_all (GstH264Dpb * dpb)

Return: (element-type GstH264Picture) (transfer full): a GArray of GstH264Picture stored in dpb

Parameters:

`dpb` –

a GstH264Dpb

Returns –
No description available

#### GstCodecs.H264Dpb.prototype.get_pictures_all

    function GstCodecs.H264Dpb.prototype.get_pictures_all(): {
        // javascript wrapper for 'gst_h264_dpb_get_pictures_all'
    }

Return: (element-type GstH264Picture) (transfer full): a GLib.Array of GstCodecs.H264Picture stored in dpb

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns ([ GstCodecs.H264Picture ]) –
No description available

#### GstCodecs.H264Dpb.get_pictures_all

    def GstCodecs.H264Dpb.get_pictures_all (self):
        #python wrapper for 'gst_h264_dpb_get_pictures_all'

Return: (element-type GstH264Picture) (transfer full): a GLib.Array of GstCodecs.H264Picture stored in dpb

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns ([ GstCodecs.H264Picture ]) –
No description available

#### gst_h264_dpb_get_pictures_long_term_ref

    gst_h264_dpb_get_pictures_long_term_ref (GstH264Dpb * dpb,
                                             gboolean include_second_field,
                                             GArray * out)

Retrieve all long-term reference pictures from dpb. The picture will be appended to the array.

Parameters:

`dpb` –

a GstH264Dpb

`include_second_field` –

TRUE if the second field pictures need to be included

`out` ( [out][element-typeGstH264Picture][transfer: full]) –

an array of GstH264Picture pointer

Since : 1.20

#### GstCodecs.H264Dpb.prototype.get_pictures_long_term_ref

    function GstCodecs.H264Dpb.prototype.get_pictures_long_term_ref(include_second_field: Number): {
        // javascript wrapper for 'gst_h264_dpb_get_pictures_long_term_ref'
    }

Retrieve all long-term reference pictures from dpb. The picture will be appended to the array.

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`include_second_field` (Number) –

true if the second field pictures need to be included

Since : 1.20

#### GstCodecs.H264Dpb.get_pictures_long_term_ref

    def GstCodecs.H264Dpb.get_pictures_long_term_ref (self, include_second_field):
        #python wrapper for 'gst_h264_dpb_get_pictures_long_term_ref'

Retrieve all long-term reference pictures from dpb. The picture will be appended to the array.

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`include_second_field` (bool) –

True if the second field pictures need to be included

Since : 1.20

#### gst_h264_dpb_get_pictures_short_term_ref

    gst_h264_dpb_get_pictures_short_term_ref (GstH264Dpb * dpb,
                                              gboolean include_non_existing,
                                              gboolean include_second_field,
                                              GArray * out)

Retrieve all short-term reference pictures from dpb. The picture will be appended to the array.

Parameters:

`dpb` –

a GstH264Dpb

`include_non_existing` –

TRUE if non-existing pictures need to be included

`include_second_field` –

TRUE if the second field pictures need to be included

`out` ( [out][element-typeGstH264Picture][transfer: full]) –

an array of GstH264Picture pointers

Since : 1.20

#### GstCodecs.H264Dpb.prototype.get_pictures_short_term_ref

    function GstCodecs.H264Dpb.prototype.get_pictures_short_term_ref(include_non_existing: Number, include_second_field: Number): {
        // javascript wrapper for 'gst_h264_dpb_get_pictures_short_term_ref'
    }

Retrieve all short-term reference pictures from dpb. The picture will be appended to the array.

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`include_non_existing` (Number) –

true if non-existing pictures need to be included

`include_second_field` (Number) –

true if the second field pictures need to be included

Since : 1.20

#### GstCodecs.H264Dpb.get_pictures_short_term_ref

    def GstCodecs.H264Dpb.get_pictures_short_term_ref (self, include_non_existing, include_second_field):
        #python wrapper for 'gst_h264_dpb_get_pictures_short_term_ref'

Retrieve all short-term reference pictures from dpb. The picture will be appended to the array.

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`include_non_existing` (bool) –

True if non-existing pictures need to be included

`include_second_field` (bool) –

True if the second field pictures need to be included

Since : 1.20

#### gst_h264_dpb_get_short_ref_by_pic_num

    GstH264Picture *
    gst_h264_dpb_get_short_ref_by_pic_num (GstH264Dpb * dpb,
                                           gint pic_num)

Find a short term reference picture which has matching picture number

Parameters:

`dpb` –

a GstH264Dpb

`pic_num` –

a picture number

Returns ( [nullable][transfer: none]) –

a GstH264Picture

#### GstCodecs.H264Dpb.prototype.get_short_ref_by_pic_num

    function GstCodecs.H264Dpb.prototype.get_short_ref_by_pic_num(pic_num: Number): {
        // javascript wrapper for 'gst_h264_dpb_get_short_ref_by_pic_num'
    }

Find a short term reference picture which has matching picture number

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`pic_num` (Number) –

a picture number

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

#### GstCodecs.H264Dpb.get_short_ref_by_pic_num

    def GstCodecs.H264Dpb.get_short_ref_by_pic_num (self, pic_num):
        #python wrapper for 'gst_h264_dpb_get_short_ref_by_pic_num'

Find a short term reference picture which has matching picture number

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`pic_num` (int) –

a picture number

Returns (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

#### gst_h264_dpb_get_size

    gint
    gst_h264_dpb_get_size (GstH264Dpb * dpb)

Return: the length of stored dpb array

Parameters:

`dpb` –

a GstH264Dpb

Returns –
No description available

#### GstCodecs.H264Dpb.prototype.get_size

    function GstCodecs.H264Dpb.prototype.get_size(): {
        // javascript wrapper for 'gst_h264_dpb_get_size'
    }

Return: the length of stored dpb array

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (Number) –
No description available

#### GstCodecs.H264Dpb.get_size

    def GstCodecs.H264Dpb.get_size (self):
        #python wrapper for 'gst_h264_dpb_get_size'

Return: the length of stored dpb array

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (int) –
No description available

#### gst_h264_dpb_mark_all_non_ref

    gst_h264_dpb_mark_all_non_ref (GstH264Dpb * dpb)

Mark all pictures are not referenced

Parameters:

`dpb` –

a GstH264Dpb

#### GstCodecs.H264Dpb.prototype.mark_all_non_ref

    function GstCodecs.H264Dpb.prototype.mark_all_non_ref(): {
        // javascript wrapper for 'gst_h264_dpb_mark_all_non_ref'
    }

Mark all pictures are not referenced

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

#### GstCodecs.H264Dpb.mark_all_non_ref

    def GstCodecs.H264Dpb.mark_all_non_ref (self):
        #python wrapper for 'gst_h264_dpb_mark_all_non_ref'

Mark all pictures are not referenced

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

#### gst_h264_dpb_needs_bump

    gboolean
    gst_h264_dpb_needs_bump (GstH264Dpb * dpb,
                             guint32 max_num_reorder_frames,
                             gboolean low_latency)

Parameters:

`dpb` –

a GstH264Dpb

`max_num_reorder_frames` –

allowed max_num_reorder_frames as specified by sps

`low_latency` –

TRUE if low-latency bumping is required

Returns –

TRUE if bumping is required

Since : 1.20

#### GstCodecs.H264Dpb.prototype.needs_bump

    function GstCodecs.H264Dpb.prototype.needs_bump(max_num_reorder_frames: Number, low_latency: Number): {
        // javascript wrapper for 'gst_h264_dpb_needs_bump'
    }

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`max_num_reorder_frames` (Number) –

allowed max_num_reorder_frames as specified by sps

`low_latency` (Number) –

true if low-latency bumping is required

Returns (Number) –

true if bumping is required

Since : 1.20

#### GstCodecs.H264Dpb.needs_bump

    def GstCodecs.H264Dpb.needs_bump (self, max_num_reorder_frames, low_latency):
        #python wrapper for 'gst_h264_dpb_needs_bump'

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`max_num_reorder_frames` (int) –

allowed max_num_reorder_frames as specified by sps

`low_latency` (bool) –

True if low-latency bumping is required

Returns (bool) –

True if bumping is required

Since : 1.20

#### gst_h264_dpb_num_ref_frames

    gint
    gst_h264_dpb_num_ref_frames (GstH264Dpb * dpb)

Parameters:

`dpb` –

a GstH264Dpb

Returns –

The number of referenced frames

Since : 1.20

#### GstCodecs.H264Dpb.prototype.num_ref_frames

    function GstCodecs.H264Dpb.prototype.num_ref_frames(): {
        // javascript wrapper for 'gst_h264_dpb_num_ref_frames'
    }

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (Number) –

The number of referenced frames

Since : 1.20

#### GstCodecs.H264Dpb.num_ref_frames

    def GstCodecs.H264Dpb.num_ref_frames (self):
        #python wrapper for 'gst_h264_dpb_num_ref_frames'

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

Returns (int) –

The number of referenced frames

Since : 1.20

#### gst_h264_dpb_perform_memory_management_control_operation

    gboolean
    gst_h264_dpb_perform_memory_management_control_operation (GstH264Dpb * dpb,
                                                              GstH264RefPicMarking * ref_pic_marking,
                                                              GstH264Picture * picture)

Perform "8.2.5.4 Adaptive memory control decoded reference picture marking process"

Parameters:

`dpb` –

a GstH265Dpb

`ref_pic_marking` –

a GstH264RefPicMarking

`picture` –

a GstH264Picture

Returns –

TRUE if successful

Since : 1.20

#### gst_h264_dpb_set_interlaced

    gst_h264_dpb_set_interlaced (GstH264Dpb * dpb,
                                 gboolean interlaced)

Parameters:

`dpb` –

a GstH264Dpb

`interlaced` –

TRUE if interlaced

Since : 1.20

#### GstCodecs.H264Dpb.prototype.set_interlaced

    function GstCodecs.H264Dpb.prototype.set_interlaced(interlaced: Number): {
        // javascript wrapper for 'gst_h264_dpb_set_interlaced'
    }

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`interlaced` (Number) –

true if interlaced

Since : 1.20

#### GstCodecs.H264Dpb.set_interlaced

    def GstCodecs.H264Dpb.set_interlaced (self, interlaced):
        #python wrapper for 'gst_h264_dpb_set_interlaced'

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`interlaced` (bool) –

True if interlaced

Since : 1.20

#### gst_h264_dpb_set_max_num_frames

    gst_h264_dpb_set_max_num_frames (GstH264Dpb * dpb,
                                     gint max_num_frames)

Set the number of maximum allowed frames to store

Parameters:

`dpb` –

a GstH264Dpb

`max_num_frames` –

the maximum number of picture

Since : 1.20

#### GstCodecs.H264Dpb.prototype.set_max_num_frames

    function GstCodecs.H264Dpb.prototype.set_max_num_frames(max_num_frames: Number): {
        // javascript wrapper for 'gst_h264_dpb_set_max_num_frames'
    }

Set the number of maximum allowed frames to store

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`max_num_frames` (Number) –

the maximum number of picture

Since : 1.20

#### GstCodecs.H264Dpb.set_max_num_frames

    def GstCodecs.H264Dpb.set_max_num_frames (self, max_num_frames):
        #python wrapper for 'gst_h264_dpb_set_max_num_frames'

Set the number of maximum allowed frames to store

Parameters:

`dpb` (GstCodecs.H264Dpb) –

a GstCodecs.H264Dpb

`max_num_frames` (int) –

the maximum number of picture

Since : 1.20

### Functions

#### gst_h264_dpb_new

    GstH264Dpb *
    gst_h264_dpb_new ()

Create new GstH264Dpb

Returns –

a new GstH264Dpb

## GstH264Picture

## GstCodecs.H264Picture

### Constructors

#### gst_h264_picture_new

    GstH264Picture *
    gst_h264_picture_new ()

Create new GstH264Picture

Returns –

a new GstH264Picture

#### GstCodecs.H264Picture.prototype.new

    function GstCodecs.H264Picture.prototype.new(): {
        // javascript wrapper for 'gst_h264_picture_new'
    }

Create new GstCodecs.H264Picture

Returns (GstCodecs.H264Picture) –

a new GstCodecs.H264Picture

#### GstCodecs.H264Picture.new

    def GstCodecs.H264Picture.new ():
        #python wrapper for 'gst_h264_picture_new'

Create new GstCodecs.H264Picture

Returns (GstCodecs.H264Picture) –

a new GstCodecs.H264Picture

### Methods

#### gst_h264_picture_get_user_data

    gpointer
    gst_h264_picture_get_user_data (GstH264Picture * picture)

Gets private data set on the picture via gst_h264_picture_set_user_data previously.

Parameters:

`picture` –

a GstH264Picture

Returns ( [transfer: none]) –

The previously set user_data

#### GstCodecs.H264Picture.prototype.get_user_data

    function GstCodecs.H264Picture.prototype.get_user_data(): {
        // javascript wrapper for 'gst_h264_picture_get_user_data'
    }

Gets private data set on the picture via GstCodecs.H264Picture.prototype.set_user_data previously.

Parameters:

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (Object) –

The previously set user_data

#### GstCodecs.H264Picture.get_user_data

    def GstCodecs.H264Picture.get_user_data (self):
        #python wrapper for 'gst_h264_picture_get_user_data'

Gets private data set on the picture via GstCodecs.H264Picture.set_user_data previously.

Parameters:

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

Returns (object) –

The previously set user_data

#### gst_h264_picture_set_reference

    gst_h264_picture_set_reference (GstH264Picture * picture,
                                    GstH264PictureReference reference,
                                    gboolean other_field)

Update reference picture type of picture with reference

Parameters:

`picture` –

a GstH264Picture

`reference` –

a GstH264PictureReference

`other_field` –

TRUE if reference needs to be applied to the other field if any

Since : 1.20

#### GstCodecs.H264Picture.prototype.set_reference

    function GstCodecs.H264Picture.prototype.set_reference(reference: GstCodecs.H264PictureReference, other_field: Number): {
        // javascript wrapper for 'gst_h264_picture_set_reference'
    }

Update reference picture type of picture with reference

Parameters:

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`reference` (GstCodecs.H264PictureReference) –

a GstH264PictureReference

`other_field` (Number) –

true if reference needs to be applied to the other field if any

Since : 1.20

#### GstCodecs.H264Picture.set_reference

    def GstCodecs.H264Picture.set_reference (self, reference, other_field):
        #python wrapper for 'gst_h264_picture_set_reference'

Update reference picture type of picture with reference

Parameters:

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`reference` (GstCodecs.H264PictureReference) –

a GstH264PictureReference

`other_field` (bool) –

True if reference needs to be applied to the other field if any

Since : 1.20

#### gst_h264_picture_set_user_data

    gst_h264_picture_set_user_data (GstH264Picture * picture,
                                    gpointer user_data,
                                    GDestroyNotify notify)

Sets user_data on the picture and the GDestroyNotify that will be called when the picture is freed.

If a user_data was previously set, then the previous set notify will be called before the user_data is replaced.

Parameters:

`picture` –

a GstH264Picture

`user_data` –

private data

`notify` ( [closure]) –

a GDestroyNotify

#### GstCodecs.H264Picture.prototype.set_user_data

    function GstCodecs.H264Picture.prototype.set_user_data(user_data: Object, notify: GLib.DestroyNotify): {
        // javascript wrapper for 'gst_h264_picture_set_user_data'
    }

Sets user_data on the picture and the GLib.DestroyNotify that will be called when the picture is freed.

If a user_data was previously set, then the previous set notify will be called before the user_data is replaced.

Parameters:

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`user_data` (Object) –

private data

`notify` (GLib.DestroyNotify) –

a GLib.DestroyNotify

#### GstCodecs.H264Picture.set_user_data

    def GstCodecs.H264Picture.set_user_data (self, *user_data, notify):
        #python wrapper for 'gst_h264_picture_set_user_data'

Sets user_data on the picture and the GLib.DestroyNotify that will be called when the picture is freed.

If a user_data was previously set, then the previous set notify will be called before the user_data is replaced.

Parameters:

`picture` (GstCodecs.H264Picture) –

a GstCodecs.H264Picture

`user_data` (variadic) –

private data

`notify` (GLib.DestroyNotify) –

a GLib.DestroyNotify

## GstH264Slice

### Members

`header` (GstH264SliceHdr) –
No description available
`nalu` (GstH264NalUnit) –
No description available

## GstCodecs.H264Slice

### Members

`header (not introspectable)` (object) –
No description available
`nalu (not introspectable)` (object) –
No description available

## GstCodecs.H264Slice

### Members

`header (not introspectable)` (object) –
No description available
`nalu (not introspectable)` (object) –
No description available

## Function Macros

### GST_H264_DECODER_CAST

    #define GST_H264_DECODER_CAST(obj)       ((GstH264Decoder*)obj)

### GST_H264_PICTURE

    #define GST_H264_PICTURE(obj)     ((GstH264Picture *)obj)

### GST_H264_PICTURE_CAST

    #define GST_H264_PICTURE_CAST(obj) (GST_H264_PICTURE(obj))

### GST_H264_PICTURE_IS_FRAME

    #define GST_H264_PICTURE_IS_FRAME(picture) \
        ((picture)->field == GST_H264_PICTURE_FIELD_FRAME)

Check whether picture is a frame (not a field picture)

Parameters:

`picture` –

a GstH264Picture

### GST_H264_PICTURE_IS_LONG_TERM_REF

    #define GST_H264_PICTURE_IS_LONG_TERM_REF(picture) \
        ((picture)->ref == GST_H264_PICTURE_REF_LONG_TERM)

Check whether picture is used for long-term reference

Parameters:

`picture` –

a GstH264Picture

### GST_H264_PICTURE_IS_REF

    #define GST_H264_PICTURE_IS_REF(picture) \
        ((picture)->ref != GST_H264_PICTURE_REF_NONE)

Check whether picture is used for short-term or long-term reference

Parameters:

`picture` –

a GstH264Picture

### GST_H264_PICTURE_IS_SHORT_TERM_REF

    #define GST_H264_PICTURE_IS_SHORT_TERM_REF(picture) \
        ((picture)->ref == GST_H264_PICTURE_REF_SHORT_TERM)

Check whether picture is used for short-term reference

Parameters:

`picture` –

a GstH264Picture

### GST_IS_H264_PICTURE

    #define GST_IS_H264_PICTURE(obj)  (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_H264_PICTURE))

## Enumerations

### GstH264PictureField

##### Members

`GST_H264_PICTURE_FIELD_FRAME` (0) –
No description available
`GST_H264_PICTURE_FIELD_TOP_FIELD` (1) –
No description available
`GST_H264_PICTURE_FIELD_BOTTOM_FIELD` (2) –
No description available

### GstCodecs.H264PictureField

##### Members

`GstCodecs.H264PictureField.FRAME` (0) –
No description available
`GstCodecs.H264PictureField.TOP_FIELD` (1) –
No description available
`GstCodecs.H264PictureField.BOTTOM_FIELD` (2) –
No description available

### GstCodecs.H264PictureField

##### Members

`GstCodecs.H264PictureField.FRAME` (0) –
No description available
`GstCodecs.H264PictureField.TOP_FIELD` (1) –
No description available
`GstCodecs.H264PictureField.BOTTOM_FIELD` (2) –
No description available

### GstH264PictureReference

##### Members

`GST_H264_PICTURE_REF_NONE` (0) –

Not used for reference picture

`GST_H264_PICTURE_REF_SHORT_TERM` (1) –

Used for short-term reference picture

`GST_H264_PICTURE_REF_LONG_TERM` (2) –

Used for long-term reference picture

### GstCodecs.H264PictureReference

##### Members

`GstCodecs.H264PictureReference.NONE` (0) –

Not used for reference picture

`GstCodecs.H264PictureReference.SHORT_TERM` (1) –

Used for short-term reference picture

`GstCodecs.H264PictureReference.LONG_TERM` (2) –

Used for long-term reference picture

### GstCodecs.H264PictureReference

##### Members

`GstCodecs.H264PictureReference.NONE` (0) –

Not used for reference picture

`GstCodecs.H264PictureReference.SHORT_TERM` (1) –

Used for short-term reference picture

`GstCodecs.H264PictureReference.LONG_TERM` (2) –

Used for long-term reference picture

## Constants

### GST_H264_DPB_MAX_SIZE

    #define GST_H264_DPB_MAX_SIZE 16

### GstCodecs.H264_DPB_MAX_SIZE

### GST_TYPE_H264_PICTURE

    #define GST_TYPE_H264_PICTURE     (gst_h264_picture_get_type())

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