External_Ex/ffmpeg/ffmpeg4.4.5/share/man/man3/libswscale.3

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.\" ========================================================================
.\"
.IX Title "doc::libswscale 3"
.TH doc::libswscale 3 " " " " " "
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
libswscale \- video scaling and pixel format conversion library
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The libswscale library performs highly optimized image scaling and
colorspace and pixel format conversion operations.
.PP
Specifically, this library performs the following conversions:
.IP "\(bu" 4
\&\fIRescaling\fR: is the process of changing the video size. Several
rescaling options and algorithms are available. This is usually a
lossy process.
.IP "\(bu" 4
\&\fIPixel format conversion\fR: is the process of converting the image
format and colorspace of the image, for example from planar \s-1YUV420P\s0 to
\&\s-1RGB24\s0 packed. It also handles packing conversion, that is converts
from packed layout (all pixels belonging to distinct planes
interleaved in the same buffer), to planar layout (all samples
belonging to the same plane stored in a dedicated buffer or \*(L"plane\*(R").
.Sp
This is usually a lossy process in case the source and destination
colorspaces differ.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBffmpeg\fR\|(1), \fBffplay\fR\|(1), \fBffprobe\fR\|(1),
\&\fBffmpeg\-scaler\fR\|(1),
\&\fBlibavutil\fR\|(3)
.SH "AUTHORS"
.IX Header "AUTHORS"
The FFmpeg developers.
.PP
For details about the authorship, see the Git history of the project
(https://git.ffmpeg.org/ffmpeg), e.g. by typing the command
\&\fBgit log\fR in the FFmpeg source directory, or browsing the
online repository at <\fBhttps://git.ffmpeg.org/ffmpeg\fR>.
.PP
Maintainers for the specific components are listed in the file
\&\fI\s-1MAINTAINERS\s0\fR in the source code tree.