GstVideoChromaResample

The functions gst_video_chroma_from_string and gst_video_chroma_to_string convert between GstVideoChromaSite and string descriptions.

GstVideoChromaResample is a utility object for resampling chroma planes and converting between different chroma sampling sitings.

GstVideoChromaResample

GstVideo.VideoChromaResample

GstVideo.VideoChromaResample

Methods

gst_video_chroma_resample_free 

gst_video_chroma_resample_free (GstVideoChromaResample * resample)

Free resample

Parameters:

resample –

a GstVideoChromaResample

GstVideo.VideoChromaResample.prototype.free 

function GstVideo.VideoChromaResample.prototype.free(): {
    // javascript wrapper for 'gst_video_chroma_resample_free'
}

Free resample

Parameters:

a GstVideo.VideoChromaResample

GstVideo.VideoChromaResample.free 

def GstVideo.VideoChromaResample.free (self):
    #python wrapper for 'gst_video_chroma_resample_free'

Free resample

Parameters:

a GstVideo.VideoChromaResample

gst_video_chroma_resample_get_info 

gst_video_chroma_resample_get_info (GstVideoChromaResample * resample,
                                    guint * n_lines,
                                    gint * offset)

The resampler must be fed n_lines at a time. The first line should be at offset.

Parameters:

resample –

a GstVideoChromaResample

n_lines ( [out][optional]) –

the number of input lines

offset ( [out][optional]) –

the first line

GstVideo.VideoChromaResample.prototype.get_info 

function GstVideo.VideoChromaResample.prototype.get_info(): {
    // javascript wrapper for 'gst_video_chroma_resample_get_info'
}

The resampler must be fed n_lines at a time. The first line should be at offset.

Parameters:

a GstVideo.VideoChromaResample

GstVideo.VideoChromaResample.get_info 

def GstVideo.VideoChromaResample.get_info (self):
    #python wrapper for 'gst_video_chroma_resample_get_info'

The resampler must be fed n_lines at a time. The first line should be at offset.

Parameters:

a GstVideo.VideoChromaResample

Functions

gst_video_chroma_resample_new 

GstVideoChromaResample *
gst_video_chroma_resample_new (GstVideoChromaMethod method,
                               GstVideoChromaSite site,
                               GstVideoChromaFlags flags,
                               GstVideoFormat format,
                               gint h_factor,
                               gint v_factor)

Create a new resampler object for the given parameters. When h_factor or v_factor is > 0, upsampling will be used, otherwise subsampling is performed.

Parameters:

method –

a GstVideoChromaMethod

site –

a GstVideoChromaSite

flags –

GstVideoChromaFlags

format –

the GstVideoFormat

h_factor –

horizontal resampling factor

v_factor –

vertical resampling factor

Returns –

a new GstVideoChromaResample that should be freed with gst_video_chroma_resample_free after usage.

Functions

gst_video_chroma_from_string 

GstVideoChromaSite
gst_video_chroma_from_string (const gchar * s)

Convert s to a GstVideoChromaSite

Parameters:

s –

a chromasite string

Returns –

a GstVideoChromaSite or GST_VIDEO_CHROMA_SITE_UNKNOWN when s does not contain a valid chroma description.

deprecated : 1.20: Use gst_video_chroma_site_from_string() instead.

GstVideo.prototype.video_chroma_from_string 

function GstVideo.prototype.video_chroma_from_string(s: String): {
    // javascript wrapper for 'gst_video_chroma_from_string'
}

Convert s to a GstVideo.VideoChromaSite

Parameters:

s (String) –

a chromasite string

Returns (GstVideo.VideoChromaSite) –

a GstVideo.VideoChromaSite or GstVideo.VideoChromaSite.UNKNOWN when s does not contain a valid chroma description.

deprecated : 1.20: Use gst_video_chroma_site_from_string() instead.

GstVideo.video_chroma_from_string 

def GstVideo.video_chroma_from_string (s):
    #python wrapper for 'gst_video_chroma_from_string'

Convert s to a GstVideo.VideoChromaSite

Parameters:

s (str) –

a chromasite string

Returns (GstVideo.VideoChromaSite) –

a GstVideo.VideoChromaSite or GstVideo.VideoChromaSite.UNKNOWN when s does not contain a valid chroma description.

deprecated : 1.20: Use gst_video_chroma_site_from_string() instead.

gst_video_chroma_resample 

gst_video_chroma_resample (GstVideoChromaResample * resample,
                           gpointer * lines,
                           gint width)

Perform resampling of width chroma pixels in lines.

Parameters:

resample –

a GstVideoChromaResample

lines –

pixel lines

width –

the number of pixels on one line

GstVideo.prototype.video_chroma_resample 

function GstVideo.prototype.video_chroma_resample(resample: GstVideo.VideoChromaResample, lines: Object, width: Number): {
    // javascript wrapper for 'gst_video_chroma_resample'
}

Perform resampling of width chroma pixels in lines.

Parameters:

a GstVideo.VideoChromaResample

lines (Object) –

pixel lines

width (Number) –

the number of pixels on one line

GstVideo.video_chroma_resample 

def GstVideo.video_chroma_resample (resample, lines, width):
    #python wrapper for 'gst_video_chroma_resample'

Perform resampling of width chroma pixels in lines.

Parameters:

a GstVideo.VideoChromaResample

lines (object) –

pixel lines

width (int) –

the number of pixels on one line

gst_video_chroma_site_from_string 

GstVideoChromaSite
gst_video_chroma_site_from_string (const gchar * s)

Convert s to a GstVideoChromaSite

Parameters:

s –

a chromasite string

Returns –

a GstVideoChromaSite or GST_VIDEO_CHROMA_SITE_UNKNOWN when s does not contain a valid chroma-site description.

Since : 1.20

GstVideo.prototype.video_chroma_site_from_string 

function GstVideo.prototype.video_chroma_site_from_string(s: String): {
    // javascript wrapper for 'gst_video_chroma_site_from_string'
}

Convert s to a GstVideo.VideoChromaSite

Parameters:

s (String) –

a chromasite string

Returns (GstVideo.VideoChromaSite) –

a GstVideo.VideoChromaSite or GstVideo.VideoChromaSite.UNKNOWN when s does not contain a valid chroma-site description.

Since : 1.20

GstVideo.video_chroma_site_from_string 

def GstVideo.video_chroma_site_from_string (s):
    #python wrapper for 'gst_video_chroma_site_from_string'

Convert s to a GstVideo.VideoChromaSite

Parameters:

s (str) –

a chromasite string

Returns (GstVideo.VideoChromaSite) –

a GstVideo.VideoChromaSite or GstVideo.VideoChromaSite.UNKNOWN when s does not contain a valid chroma-site description.

Since : 1.20

gst_video_chroma_site_to_string 

gchar *
gst_video_chroma_site_to_string (GstVideoChromaSite site)

Converts site to its string representation.

Parameters:

site –

a GstVideoChromaSite

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

a string representation of site or NULL if site contains undefined value or is equal to GST_VIDEO_CHROMA_SITE_UNKNOWN

Since : 1.20

GstVideo.prototype.video_chroma_site_to_string 

function GstVideo.prototype.video_chroma_site_to_string(site: GstVideo.VideoChromaSite): {
    // javascript wrapper for 'gst_video_chroma_site_to_string'
}

Converts site to its string representation.

Parameters:

a GstVideo.VideoChromaSite

Returns (String) –

a string representation of site or null if site contains undefined value or is equal to GstVideo.VideoChromaSite.UNKNOWN

Since : 1.20

GstVideo.video_chroma_site_to_string 

def GstVideo.video_chroma_site_to_string (site):
    #python wrapper for 'gst_video_chroma_site_to_string'

Converts site to its string representation.

Parameters:

a GstVideo.VideoChromaSite

Returns (str) –

a string representation of site or None if site contains undefined value or is equal to GstVideo.VideoChromaSite.UNKNOWN

Since : 1.20

gst_video_chroma_to_string 

const gchar *
gst_video_chroma_to_string (GstVideoChromaSite site)

Converts site to its string representation.

Parameters:

site –

a GstVideoChromaSite

Returns –

a string describing site.

deprecated : 1.20: Use gst_video_chroma_site_to_string() instead.

GstVideo.prototype.video_chroma_to_string 

function GstVideo.prototype.video_chroma_to_string(site: GstVideo.VideoChromaSite): {
    // javascript wrapper for 'gst_video_chroma_to_string'
}

Converts site to its string representation.

Parameters:

a GstVideo.VideoChromaSite

Returns (String) –

a string describing site.

deprecated : 1.20: Use gst_video_chroma_site_to_string() instead.

GstVideo.video_chroma_to_string 

def GstVideo.video_chroma_to_string (site):
    #python wrapper for 'gst_video_chroma_to_string'

Converts site to its string representation.

Parameters:

a GstVideo.VideoChromaSite

Returns (str) –

a string describing site.

deprecated : 1.20: Use gst_video_chroma_site_to_string() instead.

Enumerations

GstVideoChromaFlags

Extra flags that influence the result from gst_video_chroma_resample_new.

Members
GST_VIDEO_CHROMA_FLAG_NONE (0) –

no flags

GST_VIDEO_CHROMA_FLAG_INTERLACED (1) –

the input is interlaced

GstVideo.VideoChromaFlags

Extra flags that influence the result from gst_video_chroma_resample_new (not introspectable).

Members
GstVideo.VideoChromaFlags.NONE (0) –

no flags

GstVideo.VideoChromaFlags.INTERLACED (1) –

the input is interlaced

GstVideo.VideoChromaFlags

Extra flags that influence the result from gst_video_chroma_resample_new (not introspectable).

Members
GstVideo.VideoChromaFlags.NONE (0) –

no flags

GstVideo.VideoChromaFlags.INTERLACED (1) –

the input is interlaced

GstVideoChromaMethod

Different subsampling and upsampling methods

Members
GST_VIDEO_CHROMA_METHOD_NEAREST (0) –

Duplicates the chroma samples when upsampling and drops when subsampling

GST_VIDEO_CHROMA_METHOD_LINEAR (1) –

Uses linear interpolation to reconstruct missing chroma and averaging to subsample

GstVideo.VideoChromaMethod

Different subsampling and upsampling methods

Members
GstVideo.VideoChromaMethod.NEAREST (0) –

Duplicates the chroma samples when upsampling and drops when subsampling

GstVideo.VideoChromaMethod.LINEAR (1) –

Uses linear interpolation to reconstruct missing chroma and averaging to subsample

GstVideo.VideoChromaMethod

Different subsampling and upsampling methods

Members
GstVideo.VideoChromaMethod.NEAREST (0) –

Duplicates the chroma samples when upsampling and drops when subsampling

GstVideo.VideoChromaMethod.LINEAR (1) –

Uses linear interpolation to reconstruct missing chroma and averaging to subsample

GstVideoChromaSite

Various Chroma sitings.

Members
GST_VIDEO_CHROMA_SITE_UNKNOWN (0) –

unknown cositing

GST_VIDEO_CHROMA_SITE_NONE (1) –

no cositing

GST_VIDEO_CHROMA_SITE_H_COSITED (2) –

chroma is horizontally cosited

GST_VIDEO_CHROMA_SITE_V_COSITED (4) –

chroma is vertically cosited

GST_VIDEO_CHROMA_SITE_ALT_LINE (8) –

choma samples are sited on alternate lines

GST_VIDEO_CHROMA_SITE_COSITED (6) –

chroma samples cosited with luma samples

GST_VIDEO_CHROMA_SITE_JPEG (1) –

jpeg style cositing, also for mpeg1 and mjpeg

GST_VIDEO_CHROMA_SITE_MPEG2 (2) –

mpeg2 style cositing

GST_VIDEO_CHROMA_SITE_DV (14) –

DV style cositing

GstVideo.VideoChromaSite

Various Chroma sitings.

Members
GstVideo.VideoChromaSite.UNKNOWN (0) –

unknown cositing

GstVideo.VideoChromaSite.NONE (1) –

no cositing

GstVideo.VideoChromaSite.H_COSITED (2) –

chroma is horizontally cosited

GstVideo.VideoChromaSite.V_COSITED (4) –

chroma is vertically cosited

GstVideo.VideoChromaSite.ALT_LINE (8) –

choma samples are sited on alternate lines

GstVideo.VideoChromaSite.COSITED (6) –

chroma samples cosited with luma samples

GstVideo.VideoChromaSite.JPEG (1) –

jpeg style cositing, also for mpeg1 and mjpeg

GstVideo.VideoChromaSite.MPEG2 (2) –

mpeg2 style cositing

GstVideo.VideoChromaSite.DV (14) –

DV style cositing

GstVideo.VideoChromaSite

Various Chroma sitings.

Members
GstVideo.VideoChromaSite.UNKNOWN (0) –

unknown cositing

GstVideo.VideoChromaSite.NONE (1) –

no cositing

GstVideo.VideoChromaSite.H_COSITED (2) –

chroma is horizontally cosited

GstVideo.VideoChromaSite.V_COSITED (4) –

chroma is vertically cosited

GstVideo.VideoChromaSite.ALT_LINE (8) –

choma samples are sited on alternate lines

GstVideo.VideoChromaSite.COSITED (6) –

chroma samples cosited with luma samples

GstVideo.VideoChromaSite.JPEG (1) –

jpeg style cositing, also for mpeg1 and mjpeg

GstVideo.VideoChromaSite.MPEG2 (2) –

mpeg2 style cositing

GstVideo.VideoChromaSite.DV (14) –

DV style cositing

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