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pythonpyaudio

PyAudio readframes not ending when wav file completes

Currently doing some experimenting with PyAudio. My current goal is to import a wav file and get PyAudio to play it for me. Playing it is actually the easy part - the hard part is getting the stream to close once the wav file is complete. Right now my code never exits the while loop. I hear the wav file and then silence as the code continues to write nothing to the stream.

import wave
import pyaudio

wav = wave.open('./5secondbeat.wav')
p = pyaudio.PyAudio()
chunk = 1024
stream = p.open(format = p.get_format_from_width(wav.getsampwidth()),
                channels = wav.getnchannels(),
                rate = wav.getframerate(),
                frames_per_buffer = chunk,
                output = True)

data = wav.readframes(chunk)
while data != '':    //enters this loop
    stream.write(data)    //I hear my short 5 second wave file
    data = wav.readframes(chunk)

print('hello')    //this never gets printed and my code continues running in the loop

stream.close() 
p.terminate()

What am I missing?

Solution

  • The data types in your conditional don't correspond. You could try one of these to cast them to the same type before checking:

    while data != b'':

    or

    while data.decode("utf-8") != '':