comparison ffmpeg/doc/ffmpeg-scaler.1 @ 10:6840f77b83aa

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