NAME

       libswresample - audio resampling library

DESCRIPTION

       The libswresample library performs highly optimized audio resampling, rematrixing and sample format
       conversion operations.

       Specifically, this library performs the following conversions:

       •   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.

       •   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").

       •   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.

       Various other audio conversions (e.g. stretching and padding) are enabled through dedicated options.

SEE ALSO

       ffmpeg(1), ffplay(1), ffprobe(1), ffmpeg-resampler(1), libavutil(3)

AUTHORS

       The FFmpeg developers.

       For details about the authorship, see the Git history  of  the  project  (https://git.ffmpeg.org/ffmpeg),
       e.g.  by  typing the command git log in the FFmpeg source directory, or browsing the online repository at
       <https://git.ffmpeg.org/ffmpeg>.

       Maintainers for the specific components are listed in the file MAINTAINERS in the source code tree.

                                                                                           doc::libswresample(3)