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157 lines
4.0 KiB
Plaintext
157 lines
4.0 KiB
Plaintext
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FFMPEG-SCALER(1) FFMPEG-SCALER(1)
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NAME
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ffmpeg-scaler - FFmpeg video scaling and pixel format converter
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DESCRIPTION
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The FFmpeg rescaler provides a high-level interface to the libswscale
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library image conversion utilities. In particular it allows one to
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perform image rescaling and pixel format conversion.
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SCALER OPTIONS
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The video scaler supports the following named options.
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Options may be set by specifying -option value in the FFmpeg tools,
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with a few API-only exceptions noted below. For programmatic use, they
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can be set explicitly in the "SwsContext" options or through the
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libavutil/opt.h API.
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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. Default
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value is bicubic.
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It accepts the following values:
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fast_bilinear
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Select fast bilinear scaling algorithm.
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bilinear
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Select bilinear scaling algorithm.
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bicubic
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Select bicubic scaling algorithm.
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experimental
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Select experimental scaling algorithm.
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neighbor
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Select nearest neighbor rescaling algorithm.
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area
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Select averaging area rescaling algorithm.
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bicublin
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Select bicubic scaling algorithm for the luma component,
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bilinear for chroma components.
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gauss
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Select Gaussian rescaling algorithm.
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sinc
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Select sinc rescaling algorithm.
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lanczos
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Select Lanczos rescaling algorithm. The default width (alpha)
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is 3 and can be changed by setting "param0".
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spline
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Select natural bicubic spline rescaling algorithm.
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print_info
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Enable printing/debug logging.
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accurate_rnd
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Enable accurate rounding.
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full_chroma_int
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Enable full chroma interpolation.
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full_chroma_inp
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Select full chroma input.
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bitexact
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Enable bitexact output.
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srcw (API only)
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Set source width.
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srch (API only)
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Set source height.
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dstw (API only)
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Set destination width.
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dsth (API only)
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Set destination height.
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src_format (API only)
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Set source pixel format (must be expressed as an integer).
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dst_format (API only)
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Set destination pixel format (must be expressed as an integer).
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src_range (boolean)
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If value is set to 1, indicates source is full range. Default value
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is 0, which indicates source is limited range.
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dst_range (boolean)
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If value is set to 1, enable full range for destination. Default
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value is 0, which enables limited range.
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param0, param1
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Set scaling algorithm parameters. The specified values are specific
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of some scaling algorithms and ignored by others. The specified
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values are floating point number values.
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sws_dither
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Set the dithering algorithm. Accepts one of the following values.
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Default value is auto.
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auto
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automatic choice
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none
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no dithering
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bayer
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bayer dither
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ed error diffusion dither
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a_dither
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arithmetic dither, based using addition
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x_dither
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arithmetic dither, based using xor (more random/less apparent
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patterning that a_dither).
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alphablend
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Set the alpha blending to use when the input has alpha but the
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output does not. Default value is none.
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uniform_color
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Blend onto a uniform background color
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checkerboard
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Blend onto a checkerboard
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none
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No blending
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SEE ALSO
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ffmpeg(1), ffplay(1), ffprobe(1), libswscale(3)
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AUTHORS
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The FFmpeg developers.
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For details about the authorship, see the Git history of the project
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(https://git.ffmpeg.org/ffmpeg), e.g. by typing the command git log in
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the FFmpeg source directory, or browsing the online repository at
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<https://git.ffmpeg.org/ffmpeg>.
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Maintainers for the specific components are listed in the file
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MAINTAINERS in the source code tree.
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FFMPEG-SCALER(1)
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