forked from KolibriOS/kolibrios
177 lines
5.5 KiB
Groff
177 lines
5.5 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "doc::libswresample 3"
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.TH doc::libswresample 3 " " " " " "
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.SH "NAME"
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libswresample \- audio resampling library
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.SH "DESCRIPTION"
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.IX Header "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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.PP
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Specifically, this library performs the following conversions:
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.IP "\(bu" 4
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\&\fIResampling\fR: 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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.IP "\(bu" 4
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\&\fIFormat conversion\fR: 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 \*(L"plane\*(R").
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.IP "\(bu" 4
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\&\fIRematrixing\fR: 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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.PP
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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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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIffmpeg\fR\|(1), \fIffplay\fR\|(1), \fIffprobe\fR\|(1), \fIffserver\fR\|(1),
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\&\fIffmpeg\-resampler\fR\|(1),
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\&\fIlibavutil\fR\|(3)
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.SH "AUTHORS"
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.IX Header "AUTHORS"
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The FFmpeg developers.
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.PP
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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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\&\fBgit log\fR in the FFmpeg source directory, or browsing the
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online repository at <\fBhttp://source.ffmpeg.org\fR>.
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.PP
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Maintainers for the specific components are listed in the file
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\&\fI\s-1MAINTAINERS\s0\fR in the source code tree.
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