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\input texinfo @c -*- texinfo -*-

@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{ffserver.html,ffserver},

@url{ffmpeg-resampler.html,ffmpeg-resampler},

@url{libavutil.html,libavutil}

@end ifhtml

@ifnothtml

ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),

ffmpeg-resampler(1),

libavutil(3)

@end ifnothtml

@include authors.texi

@ignore

@setfilename libswresample

@settitle audio resampling library

@end ignore

@bye