libswresample - audio resampling library
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.
ffmpeg(1), ffplay(1), ffprobe(1),
ffmpeg-resampler(1), libavutil(3)
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.