Sortix nightly manual
This manual documents Sortix nightly, a development build that has not been officially released. You can instead view this document in the latest official manual.
| FFMPEG-SCALER(1) | FFMPEG-SCALER(1) |
NAME
ffmpeg-scaler - FFmpeg video scaling and pixel format converterDESCRIPTION
The FFmpeg rescaler provides a high-level interface to the libswscale library 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.- 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.
- area
- Select averaging area rescaling algorithm.
- bicublin
- Select bicubic scaling algorithm for the luma component, bilinear for chroma components.
- gauss
- Select Gaussian rescaling algorithm.
- sinc
- Select 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.
- 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.
- 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. Default value is auto.
- auto
- automatic choice
- none
- no 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 patterning 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
- none
- No blending