pyfaac

A easy python module taking raw PCM audio to ADTS AAC using libfaac.

Install

You need installed packages:

• libfaac-dev
• python-dev

and c compiler.

Build:

python setup.py install

Using

import pyfaac

samplerate = 16000
channels = 1
bitrate = 92000

input = open('in.wav', 'rb')
output = open('out.aac', 'wb')

codec = pyfaac.pyfaac(samplerate, channels, bitrate)
size = codec.getSize()

while True:
    data = input.read(size)
    if data:
        stream = codec.encode(data)
        output.write(stream)
    else:
        break

excess = codec.close()

input.close()
output.write(excess)
output.flush()
output.close()

Interface

codec = pyfaac.pyfaac(samplerate, channels, bitrate)

• samplerate — source PCM sample rate. AAC requires a minimum 16000 KHz;
• channels — source PCM channels. 1 — mono, 2 — stereo;
• bitrate — output AAC bitrate.

codec.getSize()

Returns the maximum size of data to be transmitted to the encoder.

aac = codec.encode(data)

Encode raw PCM data to AAC. Each fragment begins with ADTS header and ready for transport stream.

aac = codec.close()

Close encoder and returns the residual AAC data.