cross-library (GStreamer + Core Audio + MAD + FFmpeg) audio decoding for Python
Decode audio files using whichever backend is available. The library currently supports:
- Gstreamer via PyGObject.
- Core Audio on Mac OS X via ctypes. (PyObjC not required.)
- MAD via the pymad bindings.
- FFmpeg or Libav via its command-line interface.
- The standard library wave, aifc, and sunau modules (for uncompressed audio formats).
Use the library like so::
with audioread.audio_open(filename) as f: print(f.channels, f.samplerate, f.duration) for buf in f: do_something(buf)
Buffers in the file can be accessed by iterating over the object returned from
audio_open. Each buffer is a bytes-like object (
bytearray) containing raw 16-bit little-endian signed integer PCM
data. (Currently, these PCM format parameters are not configurable, but this
could be added to most of the backends.)
Additional values are available as fields on the audio file object:
channelsis the number of audio channels (an integer).
samplerateis given in Hz (an integer).
durationis the length of the audio in seconds (a float).
audio_open function transparently selects a backend that can read the
file. (Each backend is implemented in a module inside the
package.) If no backends succeed in opening the file, a
exception is raised. This exception is only used when the file type is
unsupported by the backends; if the file doesn't exist, a standard
will be raised.
Audioread is "universal" and supports both Python 2 (2.6+) and Python 3