yading@10: =head1 NAME
yading@10: 
yading@10: ffmpeg-scaler - FFmpeg video scaling and pixel format converter
yading@10: 
yading@10: =head1 DESCRIPTION
yading@10: 
yading@10: 
yading@10: The FFmpeg rescaler provides an high-level interface to the libswscale
yading@10: library image conversion utilities. In particular it allows to perform
yading@10: image rescaling and pixel format conversion.
yading@10: 
yading@10: 
yading@10: 
yading@10: =head1 SCALER OPTIONS
yading@10: 
yading@10: 
yading@10: The video scaler supports the following named options.
yading@10: 
yading@10: Options may be set by specifying -I<option> I<value> in the
yading@10: FFmpeg tools. For programmatic use, they can be set explicitly in the
yading@10: C<SwsContext> options or through the F<libavutil/opt.h> API.
yading@10: 
yading@10: 
yading@10: =over 4
yading@10: 
yading@10: 
yading@10: 
yading@10: =item B<sws_flags>
yading@10: 
yading@10: Set the scaler flags. This is also used to set the scaling
yading@10: algorithm. Only a single algorithm should be selected.
yading@10: 
yading@10: It accepts the following values:
yading@10: 
yading@10: =over 4
yading@10: 
yading@10: 
yading@10: =item B<fast_bilinear>
yading@10: 
yading@10: Select fast bilinear scaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<bilinear>
yading@10: 
yading@10: Select bilinear scaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<bicubic>
yading@10: 
yading@10: Select bicubic scaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<experimental>
yading@10: 
yading@10: Select experimental scaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<neighbor>
yading@10: 
yading@10: Select nearest neighbor rescaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<area>
yading@10: 
yading@10: Select averaging area rescaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<bicubiclin>
yading@10: 
yading@10: Select bicubic scaling algorithm for the luma component, bilinear for
yading@10: chroma components.
yading@10: 
yading@10: 
yading@10: =item B<gauss>
yading@10: 
yading@10: Select Gaussian rescaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<sinc>
yading@10: 
yading@10: Select sinc rescaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<lanczos>
yading@10: 
yading@10: Select lanczos rescaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<spline>
yading@10: 
yading@10: Select natural bicubic spline rescaling algorithm.
yading@10: 
yading@10: 
yading@10: =item B<print_info>
yading@10: 
yading@10: Enable printing/debug logging.
yading@10: 
yading@10: 
yading@10: =item B<accurate_rnd>
yading@10: 
yading@10: Enable accurate rounding.
yading@10: 
yading@10: 
yading@10: =item B<full_chroma_int>
yading@10: 
yading@10: Enable full chroma interpolation.
yading@10: 
yading@10: 
yading@10: =item B<full_chroma_inp>
yading@10: 
yading@10: Select full chroma input.
yading@10: 
yading@10: 
yading@10: =item B<bitexact>
yading@10: 
yading@10: Enable bitexact output.
yading@10: 
yading@10: =back
yading@10: 
yading@10: 
yading@10: 
yading@10: =item B<srcw>
yading@10: 
yading@10: Set source width.
yading@10: 
yading@10: 
yading@10: =item B<srch>
yading@10: 
yading@10: Set source height.
yading@10: 
yading@10: 
yading@10: =item B<dstw>
yading@10: 
yading@10: Set destination width.
yading@10: 
yading@10: 
yading@10: =item B<dsth>
yading@10: 
yading@10: Set destination height.
yading@10: 
yading@10: 
yading@10: =item B<src_format>
yading@10: 
yading@10: Set source pixel format (must be expressed as an integer).
yading@10: 
yading@10: 
yading@10: =item B<dst_format>
yading@10: 
yading@10: Set destination pixel format (must be expressed as an integer).
yading@10: 
yading@10: 
yading@10: =item B<src_range>
yading@10: 
yading@10: Select source range.
yading@10: 
yading@10: 
yading@10: =item B<dst_range>
yading@10: 
yading@10: Select destination range.
yading@10: 
yading@10: 
yading@10: =item B<param0, param1>
yading@10: 
yading@10: Set scaling algorithm parameters. The specified values are specific of
yading@10: some scaling algorithms and ignored by others. The specified values
yading@10: are floating point number values.
yading@10: 
yading@10: 
yading@10: =back
yading@10: 
yading@10: 
yading@10: 
yading@10: 
yading@10: =head1 SEE ALSO
yading@10: 
yading@10: 
yading@10: 
yading@10: ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libswscale(3)
yading@10: 
yading@10: 
yading@10: =head1 AUTHORS
yading@10: 
yading@10: 
yading@10: The FFmpeg developers.
yading@10: 
yading@10: For details about the authorship, see the Git history of the project
yading@10: (git://source.ffmpeg.org/ffmpeg), e.g. by typing the command
yading@10: B<git log> in the FFmpeg source directory, or browsing the
yading@10: online repository at E<lt>B<http://source.ffmpeg.org>E<gt>.
yading@10: 
yading@10: Maintainers for the specific components are listed in the file
yading@10: F<MAINTAINERS> in the source code tree.
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yading@10: 
yading@10: