How to play mp3 from URL

Question

I\'m trying to write a python script that will play mp3 from Soundcloud URL

This is what I\'ve already done:

from urllib.request import urlopen

url          


        

Answer 1

Sorry but I do not have Python3 to test here, to stream mp3 using pyaudio you will need decode it in PCM data, I know that pymedia can do it, but it is too old and just support python27.

To do this the right way you will need to know some attributes of your audio, things like samplerate, number of channels, bit resolution, to set it in the pyaudio.

I can show how I do it using python27 + pyaudio, first I will show how it is done to stream .wav

from urllib2 import urlopen
#to python3.x
#from urllib.request import urlopen
import pyaudio


pyaud = pyaudio.PyAudio()

srate=44100

stream = pyaud.open(format = pyaud.get_format_from_width(1),
                channels = 1,
                rate = srate,
                output = True)


url = "http://download.wavetlan.com/SVV/Media/HTTP/WAV/NeroSoundTrax/NeroSoundTrax_test4_PCM_Mono_VBR_8SS_44100Hz.wav"
u = urlopen(url)

data = u.read(8192)

while data:

    stream.write(data)
    data = u.read(8192)

choose large buffer, python is slow in while loop, i did it using chunks of size 8192, note that format, channels and rate are the rigth attributes for this wav file, so for .wav we not need decode, it is a PCM data, now for mp3 we will need decode and put in PCM format to stream.

Lets try using pymedia

from urllib2 import urlopen
import pyaudio
import pymedia.audio.acodec as acodec
import pymedia.muxer as muxer
dm= muxer.Demuxer( 'mp3' )


pyaud = pyaudio.PyAudio()

srate=44100

stream = pyaud.open(format = pyaud.get_format_from_width(2),
                channels = 1,
                rate = srate,
                output = True)


url = "http://www.bensound.org/bensound-music/bensound-dubstep.mp3"

u = urlopen(url)

data = u.read(8192)

while data:

    #Start Decode using pymedia
    dec= None
    s= " "
    sinal=[]
    while len( s ):
        s= data
        if len( s ):
            frames= dm.parse( s )
            for fr in frames:
                if dec== None:
                    # Open decoder
                    dec= acodec.Decoder( dm.streams[ 0 ] )
                r= dec.decode( fr[ 1 ] )
                if r and r.data:
                    din = r.data;
            s=""
    #decode ended

    stream.write(din)
    data = u.read(8192)

This may be secret, because I never saw anyone showing how this can be done in python, for python3 I not know anything that can decode .mp3 into pieces like pymedia do.

Here these two codes are streming and working for .wav and .mp3