mirror of
https://github.com/ayabusa/Rusty-slicer.git
synced 2024-11-22 19:13:26 +00:00
157 lines
4.0 KiB
Plaintext
157 lines
4.0 KiB
Plaintext
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
|
|
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.
|
|
|
|
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.
|
|
|
|
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
|
|
|
|
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)
|