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136 lines
2.7 KiB
136 lines
2.7 KiB
\input texinfo @c -*- texinfo -*- |
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@settitle FFmpeg Scaler Documentation |
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@titlepage |
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@center @titlefont{FFmpeg Scaler Documentation} |
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@end titlepage |
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@top |
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@contents |
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@chapter Description |
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@c man begin DESCRIPTION |
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The FFmpeg rescaler provides an high-level interface to the libswscale |
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library image conversion utilities. In particular it allows to perform |
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image rescaling and pixel format conversion. |
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@c man end DESCRIPTION |
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@chapter Scaler Options |
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@c man begin SCALER OPTIONS |
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The video scaler supports the following named options. |
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Options may be set by specifying -@var{option} @var{value} in the |
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FFmpeg tools. For programmatic use, they can be set explicitly in the |
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@code{SwsContext} options or through the @file{libavutil/opt.h} API. |
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@table @option |
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@item sws_flags |
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Set the scaler flags. This is also used to set the scaling |
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algorithm. Only a single algorithm should be selected. |
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It accepts the following values: |
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@table @samp |
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@item fast_bilinear |
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Select fast bilinear scaling algorithm. |
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@item bilinear |
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Select bilinear scaling algorithm. |
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@item bicubic |
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Select bicubic scaling algorithm. |
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@item experimental |
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Select experimental scaling algorithm. |
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@item neighbor |
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Select nearest neighbor rescaling algorithm. |
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@item area |
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Select averaging area rescaling algorithm. |
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@item bicubiclin |
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Select bicubic scaling algorithm for the luma component, bilinear for |
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chroma components. |
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@item gauss |
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Select Gaussian rescaling algorithm. |
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@item sinc |
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Select sinc rescaling algorithm. |
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@item lanczos |
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Select lanczos rescaling algorithm. |
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@item spline |
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Select natural bicubic spline rescaling algorithm. |
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@item print_info |
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Enable printing/debug logging. |
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@item accurate_rnd |
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Enable accurate rounding. |
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@item full_chroma_int |
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Enable full chroma interpolation. |
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@item full_chroma_inp |
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Select full chroma input. |
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@item bitexact |
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Enable bitexact output. |
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@end table |
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@item srcw |
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Set source width. |
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@item srch |
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Set source height. |
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@item dstw |
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Set destination width. |
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@item dsth |
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Set destination height. |
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@item src_format |
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Set source pixel format (must be expressed as an integer). |
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@item dst_format |
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Set destination pixel format (must be expressed as an integer). |
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@item src_range |
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Select source range. |
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@item dst_range |
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Select destination range. |
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@item param0, param1 |
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Set scaling algorithm parameters. The specified values are specific of |
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some scaling algorithms and ignored by others. The specified values |
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are floating point number values. |
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@end table |
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@c man end SCALER OPTIONS |
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@ignore |
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@setfilename ffmpeg-scaler |
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@settitle FFmpeg video scaling and pixel format converter |
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@c man begin SEEALSO |
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ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libswscale(3) |
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@c man end |
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@c man begin AUTHORS |
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See Git history (git://source.ffmpeg.org/ffmpeg) |
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@c man end |
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@end ignore |
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@bye
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