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@anchor{scaler_options}

@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

@anchor{sws_flags}

@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.

@item sws_dither

Set the dithering algorithm. Accepts one of the following

values. Default value is @samp{auto}.

@table @samp

@item auto

automatic choice

@item none

no dithering

@item bayer

bayer dither

@item ed

error diffusion dither

@end table

@end table

@c man end SCALER OPTIONS