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yading@10: .\" ========================================================================
yading@10: .\"
yading@10: .IX Title "FFMPEG-SCALER 1"
yading@10: .TH FFMPEG-SCALER 1 "2013-04-21" " " " "
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yading@10: .nh
yading@10: .SH "NAME"
yading@10: ffmpeg\-scaler \- FFmpeg video scaling and pixel format converter
yading@10: .SH "DESCRIPTION"
yading@10: .IX Header "DESCRIPTION"
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: .SH "SCALER OPTIONS"
yading@10: .IX Header "SCALER OPTIONS"
yading@10: The video scaler supports the following named options.
yading@10: .PP
yading@10: Options may be set by specifying \-\fIoption\fR \fIvalue\fR in the
yading@10: FFmpeg tools. For programmatic use, they can be set explicitly in the
yading@10: \&\f(CW\*(C`SwsContext\*(C'\fR options or through the \fIlibavutil/opt.h\fR \s-1API\s0.
yading@10: .IP "\fBsws_flags\fR" 4
yading@10: .IX Item "sws_flags"
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: .Sp
yading@10: It accepts the following values:
yading@10: .RS 4
yading@10: .IP "\fBfast_bilinear\fR" 4
yading@10: .IX Item "fast_bilinear"
yading@10: Select fast bilinear scaling algorithm.
yading@10: .IP "\fBbilinear\fR" 4
yading@10: .IX Item "bilinear"
yading@10: Select bilinear scaling algorithm.
yading@10: .IP "\fBbicubic\fR" 4
yading@10: .IX Item "bicubic"
yading@10: Select bicubic scaling algorithm.
yading@10: .IP "\fBexperimental\fR" 4
yading@10: .IX Item "experimental"
yading@10: Select experimental scaling algorithm.
yading@10: .IP "\fBneighbor\fR" 4
yading@10: .IX Item "neighbor"
yading@10: Select nearest neighbor rescaling algorithm.
yading@10: .IP "\fBarea\fR" 4
yading@10: .IX Item "area"
yading@10: Select averaging area rescaling algorithm.
yading@10: .IP "\fBbicubiclin\fR" 4
yading@10: .IX Item "bicubiclin"
yading@10: Select bicubic scaling algorithm for the luma component, bilinear for
yading@10: chroma components.
yading@10: .IP "\fBgauss\fR" 4
yading@10: .IX Item "gauss"
yading@10: Select Gaussian rescaling algorithm.
yading@10: .IP "\fBsinc\fR" 4
yading@10: .IX Item "sinc"
yading@10: Select sinc rescaling algorithm.
yading@10: .IP "\fBlanczos\fR" 4
yading@10: .IX Item "lanczos"
yading@10: Select lanczos rescaling algorithm.
yading@10: .IP "\fBspline\fR" 4
yading@10: .IX Item "spline"
yading@10: Select natural bicubic spline rescaling algorithm.
yading@10: .IP "\fBprint_info\fR" 4
yading@10: .IX Item "print_info"
yading@10: Enable printing/debug logging.
yading@10: .IP "\fBaccurate_rnd\fR" 4
yading@10: .IX Item "accurate_rnd"
yading@10: Enable accurate rounding.
yading@10: .IP "\fBfull_chroma_int\fR" 4
yading@10: .IX Item "full_chroma_int"
yading@10: Enable full chroma interpolation.
yading@10: .IP "\fBfull_chroma_inp\fR" 4
yading@10: .IX Item "full_chroma_inp"
yading@10: Select full chroma input.
yading@10: .IP "\fBbitexact\fR" 4
yading@10: .IX Item "bitexact"
yading@10: Enable bitexact output.
yading@10: .RE
yading@10: .RS 4
yading@10: .RE
yading@10: .IP "\fBsrcw\fR" 4
yading@10: .IX Item "srcw"
yading@10: Set source width.
yading@10: .IP "\fBsrch\fR" 4
yading@10: .IX Item "srch"
yading@10: Set source height.
yading@10: .IP "\fBdstw\fR" 4
yading@10: .IX Item "dstw"
yading@10: Set destination width.
yading@10: .IP "\fBdsth\fR" 4
yading@10: .IX Item "dsth"
yading@10: Set destination height.
yading@10: .IP "\fBsrc_format\fR" 4
yading@10: .IX Item "src_format"
yading@10: Set source pixel format (must be expressed as an integer).
yading@10: .IP "\fBdst_format\fR" 4
yading@10: .IX Item "dst_format"
yading@10: Set destination pixel format (must be expressed as an integer).
yading@10: .IP "\fBsrc_range\fR" 4
yading@10: .IX Item "src_range"
yading@10: Select source range.
yading@10: .IP "\fBdst_range\fR" 4
yading@10: .IX Item "dst_range"
yading@10: Select destination range.
yading@10: .IP "\fBparam0, param1\fR" 4
yading@10: .IX Item "param0, param1"
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: .SH "SEE ALSO"
yading@10: .IX Header "SEE ALSO"
yading@10: \&\fIffmpeg\fR\|(1), \fIffplay\fR\|(1), \fIffprobe\fR\|(1), \fIffserver\fR\|(1), \fIlibswscale\fR\|(3)
yading@10: .SH "AUTHORS"
yading@10: .IX Header "AUTHORS"
yading@10: The FFmpeg developers.
yading@10: .PP
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: \&\fBgit log\fR in the FFmpeg source directory, or browsing the
yading@10: online repository at <\fBhttp://source.ffmpeg.org\fR>.
yading@10: .PP
yading@10: Maintainers for the specific components are listed in the file
yading@10: \&\fI\s-1MAINTAINERS\s0\fR in the source code tree.