72 lines
1.8 KiB
Plaintext
72 lines
1.8 KiB
Plaintext
\input texinfo @c -*- texinfo -*-
|
|
@documentencoding UTF-8
|
|
|
|
@settitle Libswresample Documentation
|
|
@titlepage
|
|
@center @titlefont{Libswresample Documentation}
|
|
@end titlepage
|
|
|
|
@top
|
|
|
|
@contents
|
|
|
|
@chapter Description
|
|
@c man begin DESCRIPTION
|
|
|
|
The libswresample library performs highly optimized audio resampling,
|
|
rematrixing and sample format conversion operations.
|
|
|
|
Specifically, this library performs the following conversions:
|
|
|
|
@itemize
|
|
@item
|
|
@emph{Resampling}: is the process of changing the audio rate, for
|
|
example from a high sample rate of 44100Hz to 8000Hz. Audio
|
|
conversion from high to low sample rate is a lossy process. Several
|
|
resampling options and algorithms are available.
|
|
|
|
@item
|
|
@emph{Format conversion}: is the process of converting the type of
|
|
samples, for example from 16-bit signed samples to unsigned 8-bit or
|
|
float samples. It also handles packing conversion, when passing from
|
|
packed layout (all samples belonging to distinct channels interleaved
|
|
in the same buffer), to planar layout (all samples belonging to the
|
|
same channel stored in a dedicated buffer or "plane").
|
|
|
|
@item
|
|
@emph{Rematrixing}: is the process of changing the channel layout, for
|
|
example from stereo to mono. When the input channels cannot be mapped
|
|
to the output streams, the process is lossy, since it involves
|
|
different gain factors and mixing.
|
|
@end itemize
|
|
|
|
Various other audio conversions (e.g. stretching and padding) are
|
|
enabled through dedicated options.
|
|
|
|
@c man end DESCRIPTION
|
|
|
|
@chapter See Also
|
|
|
|
@ifhtml
|
|
@url{ffmpeg.html,ffmpeg}, @url{ffplay.html,ffplay}, @url{ffprobe.html,ffprobe},
|
|
@url{ffmpeg-resampler.html,ffmpeg-resampler},
|
|
@url{libavutil.html,libavutil}
|
|
@end ifhtml
|
|
|
|
@ifnothtml
|
|
ffmpeg(1), ffplay(1), ffprobe(1),
|
|
ffmpeg-resampler(1),
|
|
libavutil(3)
|
|
@end ifnothtml
|
|
|
|
@include authors.texi
|
|
|
|
@ignore
|
|
|
|
@setfilename libswresample
|
|
@settitle audio resampling library
|
|
|
|
@end ignore
|
|
|
|
@bye
|