74 lines
1.7 KiB
Plaintext
74 lines
1.7 KiB
Plaintext
=head1 NAME
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libswresample - audio resampling library
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=head1 DESCRIPTION
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The libswresample library performs highly optimized audio resampling,
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rematrixing and sample format conversion operations.
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Specifically, this library performs the following conversions:
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=over 4
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=item *
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I<Resampling>: is the process of changing the audio rate, for
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example from a high sample rate of 44100Hz to 8000Hz. Audio
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conversion from high to low sample rate is a lossy process. Several
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resampling options and algorithms are available.
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=item *
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I<Format conversion>: is the process of converting the type of
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samples, for example from 16-bit signed samples to unsigned 8-bit or
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float samples. It also handles packing conversion, when passing from
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packed layout (all samples belonging to distinct channels interleaved
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in the same buffer), to planar layout (all samples belonging to the
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same channel stored in a dedicated buffer or "plane").
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=item *
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I<Rematrixing>: is the process of changing the channel layout, for
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example from stereo to mono. When the input channels cannot be mapped
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to the output streams, the process is lossy, since it involves
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different gain factors and mixing.
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=back
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Various other audio conversions (e.g. stretching and padding) are
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enabled through dedicated options.
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=head1 SEE ALSO
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ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
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ffmpeg-resampler(1),
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libavutil(3)
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=head1 AUTHORS
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The FFmpeg developers.
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For details about the authorship, see the Git history of the project
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(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command
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B<git log> in the FFmpeg source directory, or browsing the
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online repository at E<lt>B<http://source.ffmpeg.org>E<gt>.
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Maintainers for the specific components are listed in the file
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F<MAINTAINERS> in the source code tree.
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