142 lines
2.8 KiB
Plaintext
142 lines
2.8 KiB
Plaintext
\input texinfo @c -*- texinfo -*-
|
|
|
|
@settitle FFmpeg Scaler Documentation
|
|
@titlepage
|
|
@center @titlefont{FFmpeg Scaler Documentation}
|
|
@end titlepage
|
|
|
|
@top
|
|
|
|
@contents
|
|
|
|
@chapter Description
|
|
@c man begin DESCRIPTION
|
|
|
|
The FFmpeg rescaler provides an high-level interface to the libswscale
|
|
library image conversion utilities. In particular it allows to perform
|
|
image rescaling and pixel format conversion.
|
|
|
|
@c man end DESCRIPTION
|
|
|
|
@chapter Scaler Options
|
|
@c man begin SCALER OPTIONS
|
|
|
|
The video scaler supports the following named options.
|
|
|
|
Options may be set by specifying -@var{option} @var{value} in the
|
|
FFmpeg tools. For programmatic use, they can be set explicitly in the
|
|
@code{SwsContext} options or through the @file{libavutil/opt.h} API.
|
|
|
|
@table @option
|
|
|
|
@item sws_flags
|
|
Set the scaler flags. This is also used to set the scaling
|
|
algorithm. Only a single algorithm should be selected.
|
|
|
|
It accepts the following values:
|
|
@table @samp
|
|
@item fast_bilinear
|
|
Select fast bilinear scaling algorithm.
|
|
|
|
@item bilinear
|
|
Select bilinear scaling algorithm.
|
|
|
|
@item bicubic
|
|
Select bicubic scaling algorithm.
|
|
|
|
@item experimental
|
|
Select experimental scaling algorithm.
|
|
|
|
@item neighbor
|
|
Select nearest neighbor rescaling algorithm.
|
|
|
|
@item area
|
|
Select averaging area rescaling algorithm.
|
|
|
|
@item bicubiclin
|
|
Select bicubic scaling algorithm for the luma component, bilinear for
|
|
chroma components.
|
|
|
|
@item gauss
|
|
Select Gaussian rescaling algorithm.
|
|
|
|
@item sinc
|
|
Select sinc rescaling algorithm.
|
|
|
|
@item lanczos
|
|
Select lanczos rescaling algorithm.
|
|
|
|
@item spline
|
|
Select natural bicubic spline rescaling algorithm.
|
|
|
|
@item print_info
|
|
Enable printing/debug logging.
|
|
|
|
@item accurate_rnd
|
|
Enable accurate rounding.
|
|
|
|
@item full_chroma_int
|
|
Enable full chroma interpolation.
|
|
|
|
@item full_chroma_inp
|
|
Select full chroma input.
|
|
|
|
@item bitexact
|
|
Enable bitexact output.
|
|
@end table
|
|
|
|
@item srcw
|
|
Set source width.
|
|
|
|
@item srch
|
|
Set source height.
|
|
|
|
@item dstw
|
|
Set destination width.
|
|
|
|
@item dsth
|
|
Set destination height.
|
|
|
|
@item src_format
|
|
Set source pixel format (must be expressed as an integer).
|
|
|
|
@item dst_format
|
|
Set destination pixel format (must be expressed as an integer).
|
|
|
|
@item src_range
|
|
Select source range.
|
|
|
|
@item dst_range
|
|
Select destination range.
|
|
|
|
@item 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.
|
|
|
|
@end table
|
|
|
|
@c man end SCALER OPTIONS
|
|
|
|
@chapter See Also
|
|
|
|
@ifhtml
|
|
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe}, @url{ffserver.html,ffserver},
|
|
@url{libswscale.html,libswscale}
|
|
@end ifhtml
|
|
|
|
@ifnothtml
|
|
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libswscale(3)
|
|
@end ifnothtml
|
|
|
|
@include authors.texi
|
|
|
|
@ignore
|
|
|
|
@setfilename ffmpeg-scaler
|
|
@settitle FFmpeg video scaling and pixel format converter
|
|
|
|
@end ignore
|
|
|
|
@bye
|