From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001 From: Indrajith K L Date: Sat, 3 Dec 2022 17:00:20 +0530 Subject: Adds most of the tools --- ffmpeg/doc/ffmpeg-scaler.html | 256 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 ffmpeg/doc/ffmpeg-scaler.html (limited to 'ffmpeg/doc/ffmpeg-scaler.html') diff --git a/ffmpeg/doc/ffmpeg-scaler.html b/ffmpeg/doc/ffmpeg-scaler.html new file mode 100644 index 0000000..4b5bf0d --- /dev/null +++ b/ffmpeg/doc/ffmpeg-scaler.html @@ -0,0 +1,256 @@ + + + + + + + FFmpeg Scaler Documentation + + + + + + +
+

+ FFmpeg Scaler Documentation +

+
+
+ + + + +
+

Table of Contents

+ +
+ + +
+
+ + +

1 Description

+ +

The FFmpeg rescaler provides a high-level interface to the libswscale +library image conversion utilities. In particular it allows one to perform +image rescaling and pixel format conversion. +

+ + +

2 Scaler Options

+ +

The video scaler supports the following named options. +

+

Options may be set by specifying -option value in the +FFmpeg tools, with a few API-only exceptions noted below. +For programmatic use, they can be set explicitly in the +SwsContext options or through the libavutil/opt.h API. +

+
+
+
+
sws_flags
+

Set the scaler flags. This is also used to set the scaling +algorithm. Only a single algorithm should be selected. Default +value is ‘bicubic’. +

+

It accepts the following values: +

+
‘fast_bilinear’
+

Select fast bilinear scaling algorithm. +

+
+
‘bilinear’
+

Select bilinear scaling algorithm. +

+
+
‘bicubic’
+

Select bicubic scaling algorithm. +

+
+
‘experimental’
+

Select experimental scaling algorithm. +

+
+
‘neighbor’
+

Select nearest neighbor rescaling algorithm. +

+
+
‘area’
+

Select averaging area rescaling algorithm. +

+
+
‘bicublin’
+

Select bicubic scaling algorithm for the luma component, bilinear for +chroma components. +

+
+
‘gauss’
+

Select Gaussian rescaling algorithm. +

+
+
‘sinc’
+

Select sinc rescaling algorithm. +

+
+
‘lanczos’
+

Select Lanczos rescaling algorithm. The default width (alpha) is 3 and can be +changed by setting param0. +

+
+
‘spline’
+

Select natural bicubic spline rescaling algorithm. +

+
+
‘print_info’
+

Enable printing/debug logging. +

+
+
‘accurate_rnd’
+

Enable accurate rounding. +

+
+
‘full_chroma_int’
+

Enable full chroma interpolation. +

+
+
‘full_chroma_inp’
+

Select full chroma input. +

+
+
‘bitexact’
+

Enable bitexact output. +

+
+ +
+
srcw (API only)
+

Set source width. +

+
+
srch (API only)
+

Set source height. +

+
+
dstw (API only)
+

Set destination width. +

+
+
dsth (API only)
+

Set destination height. +

+
+
src_format (API only)
+

Set source pixel format (must be expressed as an integer). +

+
+
dst_format (API only)
+

Set destination pixel format (must be expressed as an integer). +

+
+
src_range (boolean)
+

If value is set to 1, indicates source is full range. Default value is +0, which indicates source is limited range. +

+
+
dst_range (boolean)
+

If value is set to 1, enable full range for destination. Default value +is 0, which enables limited range. +

+
+
param0, param1
+

Set scaling algorithm parameters. The specified values are specific of +some scaling algorithms and ignored by others. The specified values +are floating point number values. +

+
+
sws_dither
+

Set the dithering algorithm. Accepts one of the following +values. Default value is ‘auto’. +

+
+
‘auto’
+

automatic choice +

+
+
‘none’
+

no dithering +

+
+
‘bayer’
+

bayer dither +

+
+
‘ed’
+

error diffusion dither +

+
+
‘a_dither’
+

arithmetic dither, based using addition +

+
+
‘x_dither’
+

arithmetic dither, based using xor (more random/less apparent patterning that +a_dither). +

+
+
+ +
+
alphablend
+

Set the alpha blending to use when the input has alpha but the output does not. +Default value is ‘none’. +

+
+
‘uniform_color’
+

Blend onto a uniform background color +

+
+
‘checkerboard’
+

Blend onto a checkerboard +

+
+
‘none’
+

No blending +

+
+
+ +
+
+ + + +

3 See Also

+ +

ffmpeg, ffplay, ffprobe, +libswscale +

+ + +

4 Authors

+ +

The FFmpeg developers. +

+

For details about the authorship, see the Git history of the project +(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command +git log in the FFmpeg source directory, or browsing the +online repository at http://source.ffmpeg.org. +

+

Maintainers for the specific components are listed in the file +MAINTAINERS in the source code tree. +

+ +

+ This document was generated using makeinfo. +

+
+ + -- cgit v1.2.3