GstVideo.VideoScaler

Fields

None

Methods

	free ()
	get_coeff (out_offset)
	get_max_taps ()
	horizontal (format, src, dest, dest_offset, width)
	vertical (format, src_lines, dest, dest_offset, width)

Details

class GstVideo.VideoScaler

GstVideo.VideoScaler is a utility object for rescaling and resampling video frames using various interpolation / sampling methods.

free()

Free a previously allocated GstVideo.VideoScaler self.

get_coeff(out_offset)

Parameters:

out_offset (int) – an output offset

Returns:

an array of n_tap float values with filter coefficients.

in_offset:

result input offset

n_taps:

result n_taps

Return type:

(float, in_offset: int, n_taps: int)

For a given pixel at out_offset, get the first required input pixel at in_offset and the n_taps filter coefficients.

Note that for interlaced content, in_offset needs to be incremented with 2 to get the next input line.

get_max_taps()

Returns:

the maximum number of taps

Return type:

int

Get the maximum number of taps for self.

horizontal(format, src, dest, dest_offset, width)

Parameters:

• format (GstVideo.VideoFormat) – a GstVideo.VideoFormat for src and dest

• src (object or None) – source pixels

• dest (object or None) – destination pixels

• dest_offset (int) – the horizontal destination offset

• width (int) – the number of pixels to scale

Horizontally scale the pixels in src to dest, starting from dest_offset for width samples.

vertical(format, src_lines, dest, dest_offset, width)

Parameters:

• format (GstVideo.VideoFormat) – a GstVideo.VideoFormat for srcs and dest

• src_lines (object or None) – source pixels lines

• dest (object or None) – destination pixels

• dest_offset (int) – the vertical destination offset

• width (int) – the number of pixels to scale

Vertically combine width pixels in the lines in src_lines to dest. dest is the location of the target line at dest_offset and srcs are the input lines for dest_offset.