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I'm trying to stream audio from an android application to a python server, I have both codes here.
The client:
public class MainActivity extends AppCompatActivity {
private Button startButton,stopButton;
public byte[] buffer;
public static DatagramSocket socket;
private int port=4100;
AudioRecord recorder;
private int sampleRate = 44100 ; // 44100 for music
private int channelConfig = AudioFormat.CHANNEL_IN_MONO;
private int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
int minBufSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);
private boolean status = true;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startButton = (Button) findViewById (R.id.start_button);
stopButton = (Button) findViewById (R.id.stop_button);
startButton.setOnClickListener (startListener);
stopButton.setOnClickListener (stopListener);
}
private final OnClickListener stopListener = new OnClickListener() {
#Override
public void onClick(View arg0) {
status = false;
recorder.release();
Log.d("VS","Recorder released");
}
};
private final OnClickListener startListener = new OnClickListener() {
#Override
public void onClick(View arg0) {
status = true;
startStreaming();
}
};
public void startStreaming() {
Thread streamThread = new Thread(new Runnable() {
#Override
public void run() {
try {
DatagramSocket socket = new DatagramSocket();
Log.d("VS", "Socket Created");
byte[] buffer = new byte[minBufSize];
Log.d("VS","Buffer created of size " + minBufSize);
DatagramPacket packet;
Log.d("VS", "Address retrieved");
final InetAddress destination = InetAddress.getByName("192.168.43.71");
Log.d("VS", "Address retrieved");
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,sampleRate,channelConfig,audioFormat,minBufSize*10);
Log.d("VS", "Recorder initialized");
recorder.startRecording();
while(status == true) {
//reading data from MIC into buffer
minBufSize = recorder.read(buffer, 0, buffer.length);
//putting buffer in the packet
packet = new DatagramPacket (buffer,buffer.length,destination,port);
socket.send(packet);
System.out.println("MinBufferSize: " +minBufSize);
}
} catch(UnknownHostException e) {
Log.e("VS", "UnknownHostException",e);
} catch (IOException e) {
e.printStackTrace();
Log.e("VS", ""+ e);
}
}
});
streamThread.start();
}
}
The python server:
import pyaudio
import socket
from threading import Thread
import numpy as np
from matplotlib import pyplot as plt
frames = []
def udpStream(CHUNK):
udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udp.bind(("192.165.43.72", 4100))
while True:
# soundData, addr = udp.recvfrom(CHUNK)
soundData, addr = udp.recvfrom(CHUNK * CHANNELS * 2)
frames.append(soundData)
print (numpydata)
plt.plot(numpydata)
plt.show()
udp.close()
def play(stream, CHUNK):
BUFFER = 10
while True:
if len(frames) == BUFFER:
while True:
try:
stream.write(frames.pop(0), CHUNK)
except:
pass
if __name__ == "__main__":
FORMAT = pyaudio.paInt16
CHUNK = 1024
CHANNELS = 2
RATE = 44100
p = pyaudio.PyAudio()
stream = p.open(format=FORMAT,
channels = CHANNELS,
rate = RATE,
output = True,
input=True,
frames_per_buffer = CHUNK,
)
Ts = Thread(target = udpStream, args=(CHUNK,))
Tp = Thread(target = play, args=(stream, CHUNK,))
Ts.setDaemon(True)
Tp.setDaemon(True)
Ts.start()
Tp.start()
Ts.join()
Tp.join()
This is not my code, I found it here Noise in Audio Streaming from Android to PC using UDP with Python Server.
I'm not getting any errors on the client, but when I try to run the python server (after installing pyaudio, numpy and matplotlib), I get this error and I don't know why.
Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Python34\lib\threading.py", line 920, in _bootstrap_inner
self.run()
File "C:\Python34\lib\threading.py", line 868, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Eric\Desktop\Servidor\Servidor.py", line 18, in udpStream
print (numpydata)
NameError: name 'numpydata' is not defined
I don't know how to fix this, could you help me please?
Thank you all!