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FFMPEG-SCALER(1) FFMPEG-SCALER(1) NAME ffmpeg-scaler - FFmpeg video scaling and pixel format converter DESCRIPTION The FFmpeg rescaler provides a high-level interface to the libswscale li- brary image conversion utilities. In particular it allows one to perform image rescaling and pixel format conversion. SCALER OPTIONS The video scaler supports the following named options. Options may be set by specifying -option value in the FFmpeg tools, with a few API-only exceptions noted below. For programmatic use, they can be set explicitly in the "SwsContext" options or through the libavutil/opt.h API. sws_flags Set the scaler flags. This is also used to set the scaling algorithm. Only a single algorithm should be selected. Default value is bicubic. It accepts the following values: fast_bilinear Select fast bilinear scaling algorithm. bilinear Select bilinear scaling algorithm. bicubic Select bicubic scaling algorithm. experimental Select experimental scaling algorithm. neighbor Select nearest neighbor rescaling algorithm. areaSelect averaging area rescaling algorithm. bicublin Select bicubic scaling algorithm for the luma component, bilinear for chroma components. gauss Select Gaussian rescaling algorithm. sincSelect sinc rescaling algorithm. lanczos Select Lanczos rescaling algorithm. The default width (alpha) is 3 and can be changed by setting "param0". spline Select natural bicubic spline rescaling algorithm. print_info Enable printing/debug logging. accurate_rnd Enable accurate rounding. full_chroma_int Enable full chroma interpolation. full_chroma_inp Select full chroma input. bitexact Enable bitexact output. unstable Allow the use of experimental new code. May subtly affect the out- put or even produce wrong results. For testing only. srcw (API only) Set source width. srch (API only) Set source height. dstw (API only) Set destination width. dsth (API only) Set destination height. src_format (API only) Set source pixel format (must be expressed as an integer). dst_format (API only) Set destination pixel format (must be expressed as an integer). src_range (boolean) If value is set to 1, indicates source is full range. Default value is 0, which indicates source is limited range. dst_range (boolean) If value is set to 1, enable full range for destination. Default value is 0, which enables limited range. gamma (boolean) If value is set to 1, enable gamma correct scaling. Default value is 0. 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. sws_dither Set the dithering algorithm. Accepts one of the following values. De- fault value is auto. autoautomatic choice noneno dithering bayer bayer dither ed error diffusion dither a_dither arithmetic dither, based using addition x_dither arithmetic dither, based using xor (more random/less apparent pat- terning that a_dither). alphablend Set the alpha blending to use when the input has alpha but the output does not. Default value is none. uniform_color Blend onto a uniform background color checkerboard Blend onto a checkerboard noneNo blending SEE ALSO ffmpeg(1), ffplay(1), ffprobe(1), libswscale(3) AUTHORS The FFmpeg developers. For details about the authorship, see the Git history of the project (https://git.ffmpeg.org/ffmpeg), e.g. by typing the command git log in the FFmpeg source directory, or browsing the online repository at <https://git.ffmpeg.org/ffmpeg>. Maintainers for the specific components are listed in the file MAINTAINERS in the source code tree. FFMPEG-SCALER(1)
NAME | DESCRIPTION | SCALER OPTIONS | SEE ALSO | AUTHORS
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