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submodule
ffmpeg
Commits
cf6c6134
Commit
cf6c6134
authored
Nov 13, 2012
by
Stefano Sabatini
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doc: add libswscale.texi and ffmpeg-scaler.texi files
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-1
Makefile
doc/Makefile
+2
-1
ffmpeg-scaler.texi
doc/ffmpeg-scaler.texi
+136
-0
libswscale.texi
doc/libswscale.texi
+55
-0
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doc/Makefile
View file @
cf6c6134
DOCLIBS-$(CONFIG_AVUTIL)
+=
libavutil
DOCLIBS-$(CONFIG_AVUTIL)
+=
libavutil
DOCLIBS-$(CONFIG_SWSCALE)
+=
libswscale
DOCLIBS-$(CONFIG_SWRESAMPLE)
+=
libswresample
DOCLIBS-$(CONFIG_SWRESAMPLE)
+=
libswresample
DOCLIBS-$(CONFIG_AVCODEC)
+=
libavcodec
DOCLIBS-$(CONFIG_AVCODEC)
+=
libavcodec
DOCLIBS-$(CONFIG_AVFILTER)
+=
libavfilter
DOCLIBS-$(CONFIG_AVFILTER)
+=
libavfilter
COMPONENTS
=
$
(
PROGS-yes
)
ffmpeg-codecs ffmpeg-filters ffmpeg-resampler
COMPONENTS
=
$
(
PROGS-yes
)
ffmpeg-codecs ffmpeg-filters ffmpeg-resampler
ffmpeg-scaler
MANPAGES
=
$
(
COMPONENTS:%
=
doc/%.1
)
$
(
DOCLIBS-yes:%
=
doc/%.3
)
MANPAGES
=
$
(
COMPONENTS:%
=
doc/%.1
)
$
(
DOCLIBS-yes:%
=
doc/%.3
)
PODPAGES
=
$
(
COMPONENTS:%
=
doc/%.pod
)
$
(
DOCLIBS-yes:%
=
doc/%.pod
)
PODPAGES
=
$
(
COMPONENTS:%
=
doc/%.pod
)
$
(
DOCLIBS-yes:%
=
doc/%.pod
)
...
...
doc/ffmpeg-scaler.texi
0 → 100644
View file @
cf6c6134
\input
texinfo @c -*- texinfo -*-
@settitle FFmpeg Scaler Documentation
@titlepage
@center @titlefont
{
FFmpeg Scaler Documentation
}
@end titlepage
@top
@contents
@chapter Description
@c man begin DESCRIPTION
The FFmpeg rescaler provides an high-level interface to the libswscale
library image conversion utilities. In particular it allows to perform
image rescaling and pixel format conversion.
@c man end DESCRIPTION
@chapter Scaler Options
@c man begin SCALER OPTIONS
The video scaler supports the following named options.
Options may be set by specifying -@var
{
option
}
@var
{
value
}
in the
FFmpeg tools. For programmatic use, they can be set explicitly in the
@code
{
SwsContext
}
options or through the @file
{
libavutil/opt.h
}
API.
@table @option
@item sws
_
flags
Set the scaler flags. This is also used to set the scaling
algorithm. Only a single algorithm should be selected.
It accepts the following values:
@table @samp
@item fast
_
bilinear
Select fast bilinear scaling algorithm.
@item bilinear
Select bilinear scaling algorithm.
@item bicubic
Select bicubic scaling algorithm.
@item experimental
Select experimental scaling algorithm.
@item neighbor
Select nearest neighbor rescaling algorithm.
@item area
Select averaging area rescaling algorithm.
@item bicubiclin
Select bicubic scaling algorithm for the luma component, bilinear for
chroma components.
@item gauss
Select Gaussian rescaling algorithm.
@item sinc
Select sinc rescaling algorithm.
@item lanczos
Select lanczos rescaling algorithm.
@item spline
Select natural bicubic spline rescaling algorithm.
@item print
_
info
Enable printing/debug logging.
@item accurate
_
rnd
Enable accurate rounding.
@item full
_
chroma
_
int
Enable full chroma interpolation.
@item full
_
chroma
_
inp
Select full chroma input.
@item bitexact
Enable bitexact output.
@end table
@item srcw
Set source width.
@item srch
Set source height.
@item dstw
Set destination width.
@item dsth
Set destination height.
@item src
_
format
Set source pixel format (must be expressed as an integer).
@item dst
_
format
Set destination pixel format (must be expressed as an integer).
@item src
_
range
Select source range.
@item dst
_
range
Select destination range.
@item 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.
@end table
@c man end SCALER OPTIONS
@ignore
@setfilename ffmpeg-scaler
@settitle FFmpeg video scaling and pixel format converter
@c man begin SEEALSO
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), libswscale(3)
@c man end
@c man begin AUTHORS
See Git history (git://source.ffmpeg.org/ffmpeg)
@c man end
@end ignore
@bye
doc/libswscale.texi
0 → 100644
View file @
cf6c6134
\input
texinfo @c -*- texinfo -*-
@settitle Libswscale Documentation
@titlepage
@center @titlefont
{
Libswscale Documentation
}
@end titlepage
@top
@contents
@chapter Description
@c man begin DESCRIPTION
The libswscale library performs highly optimized image scaling and
colorspace and pixel format conversion operations.
Specifically, this library performs the following conversions:
@itemize
@item
@emph
{
Rescaling
}
: is the process of changing the video size. Several
rescaling options and algorithms are available. This is usually a
lossy process.
@item
@emph
{
Pixel format conversion
}
: is the process of converting the image
format and colorspace of the image, for example from planar YUV420P to
RGB24 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 "plane").
This is usually a lossy process in case the source and destination
colorspaces differ.
@end itemize
@c man end DESCRIPTION
@ignore
@setfilename libswscale
@settitle video scaling and pixel format conversion library
@c man begin SEEALSO
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), ffmpeg-scaler(1), libavutil(3)
@c man end
@c man begin AUTHORS
See Git history (git://source.ffmpeg.org/ffmpeg)
@c man end
@end ignore
@bye
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