import pymedia.audio.acodec as acodec
import pymedia.muxer as muxer

name='Sia - Chandelier.mp3';


name1= str.split(name,'.')


if name1[ -1 ].lower()  == 'mp3':


    dm= muxer.Demuxer( name1[ -1 ].lower() )
    f=open(name, 'rb' )
    dec= None
    s= " "
    sinal=[]
    while len( s ):
        s= f.read( 4096 )
        if len( s ):
            frames= dm.parse( s )
            for fr in frames:
                if dec== None:
                    dec= acodec.Decoder( dm.streams[ 0 ] )
                r= dec.decode( fr[ 1 ] )
                if r and r.data:
                    din = np.fromstring(r.data, dtype=np.int16)
                    sinal.append(din)

# Open muxer and encoder

          if enc== None:
            params= { 'id': acodec.getCodecID(type),
                      'bitrate': bitrate,
                      'sample_rate': r.sample_rate,
                      'channels': r.channels }
            print 'Encoder params:', params
            mx= muxer.Muxer( type )
            stId= mx.addStream( muxer.CODEC_TYPE_AUDIO, params )
            enc= acodec.Encoder( params )
            fw= open(fOutput, 'wb')
            ss= mx.start()
            fw.write(ss)

          enc_frames= enc.encode( pack("%dh"%len(sinal), *(sinal)) )
          if enc_frames:
            for efr in enc_frames:
              ss= mx.write( stId, efr )
              if ss:
                fw.write(ss)