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.