forked from KolibriOS/kolibrios
74 lines
1.7 KiB
Plaintext
74 lines
1.7 KiB
Plaintext
=head1 NAME
|
|
|
|
libswresample - audio resampling library
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
|
|
The libswresample library performs highly optimized audio resampling,
|
|
rematrixing and sample format conversion operations.
|
|
|
|
Specifically, this library performs the following conversions:
|
|
|
|
|
|
=over 4
|
|
|
|
|
|
=item *
|
|
|
|
I<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 *
|
|
|
|
I<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 *
|
|
|
|
I<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.
|
|
|
|
=back
|
|
|
|
|
|
Various other audio conversions (e.g. stretching and padding) are
|
|
enabled through dedicated options.
|
|
|
|
|
|
|
|
=head1 SEE ALSO
|
|
|
|
|
|
|
|
ffmpeg(1), ffplay(1), ffprobe(1), ffserver(1),
|
|
ffmpeg-resampler(1),
|
|
libavutil(3)
|
|
|
|
|
|
=head1 AUTHORS
|
|
|
|
|
|
The FFmpeg developers.
|
|
|
|
For details about the authorship, see the Git history of the project
|
|
(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command
|
|
B<git log> in the FFmpeg source directory, or browsing the
|
|
online repository at E<lt>B<http://source.ffmpeg.org>E<gt>.
|
|
|
|
Maintainers for the specific components are listed in the file
|
|
F<MAINTAINERS> in the source code tree.
|
|
|
|
|
|
|