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pythonaudioffmpegpopen
Kendall Weihe
Kendall Weihe

Reputation: 2075

Python FFMPEG AttributeError: 'Popen' object has no attribute 'proc'

I'm working on a tensorflow project that learns from an audio stream. I'm trying to open an audio file and store the data in an array using FFMPEG. I'm following the tutorial here

My code looks like this:

import subprocess as sp
FFMPEG_BIN = "ffmpeg"
try:
    if image_file != 'train/rock/.DS_Store':
        command = [FFMPEG_BIN,
            '-i', image_file,
            '-f', 's16le',
            '-acodec', 'pcm_s16le',
            '-ar', '44100',
            '-ac', '2',
            'output.png']
        pipe = sp.Popen(command, stdout=sp.PIPE, bufsize=10**8)
        # pipe = sp.Popen(command, stdout=sp.PIPE)
        raw_audio = pipe.proc.stdout.read(88200*4)

But I'm getting the error: 

AttributeError: 'Popen' object has no attribute 'proc'

Upvotes: 0

Views: 5099

Answers (2)

Jose Medina
Jose Medina

Reputation: 101

I am working with ffmpeg and pyaudio. This code works for me. 

import pyaudio   
import subprocess as sp  
import numpy  
command = [ 'ffmpeg',
        '-i', "Filename", # I used a url stream 
    '-loglevel','error',
        '-f', 's16le',
        '-acodec', 'pcm_s16le',
        '-ar', '44100', # ouput will have 44100 Hz
        '-ac', '2', # stereo (set to '1' for mono)
        '-']  
pipe = sp.Popen(command, stdout=sp.PIPE, bufsize=10**8)  
p = pyaudio.PyAudio()  #PyAudio helps to reproduce raw data in pipe.  
stream = p.open(format = pyaudio.paInt16,
                channels = 2,
                rate = 44100,
                output = True)  
while True:  
    raw_audio = pipe.stdout.read(44100*2) #get raw data   
    stream.write(raw_audio) # reproduce  
    # Convert raw data in array with numpy  
    audio_array = numpy.fromstring(raw_audio, dtype="int16")  
    audio_array = audio_array.reshape((len(audio_array)/2,2))  
stream.stop_stream()  
stream.close()


In ubuntu you can install pyaudio with: 

sudo apt-get install python-pyaudio python3-pyaudio

or 

pip install pyaudio

Upvotes: 1

Vincent Berthiaume
Vincent Berthiaume

Reputation: 87

As suggested in the comments, this worked for me: 

import subprocess as sp
import numpy as np

command = [ 'ffmpeg',
        '-i', 'song.mp3',
        '-f', 's16le',
        '-acodec', 'pcm_s16le',
        '-ar', '22050', 
        '-ac', '1',
        '-']

pipe = sp.Popen(command, stdout=sp.PIPE)
stdoutdata = pipe.stdout.read()
audio_array = np.fromstring(stdoutdata, dtype="int16")

I'm not quite sure however why you're trying to convert an "image_file" into a ".png" using audio conversion?

Upvotes: 0

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