update imhow in callback from pyaudio

[markB]

Hi All,

I am trying to process some audio parallel with taking some images.
The idea is to grab a data from the micropohone using pyaudio, then
Process that audio in a callback furntion, then
take an image from the webcam and plot this together with some information from the audio stream.

I am having trouble in producing the image during the pyaudio loop.
During running the figure remains blank, sometimes when i press "stop current command" in spyder it start to run.
The latter makes me think I must be close, can someone assist?

Thanks,

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import pyaudio import numpy as np import matplotlib.pyplot as plt import cv2 import time   CHUNK = 1024 * 10 WINDOW = 5 * CHUNK FORMAT = pyaudio.paInt16 CHANNELS = 2 RATE = 44100 THRESH = 100   cap = cv2.VideoCapture(0) p = pyaudio.PyAudio()       fig, ax = plt.subplots() image = ax.imshow(np.zeros((480,460)),animated=False,cmap='gray', vmin=0, vmax=255)     def callback(in_data, frame_count, time_info, status):     data = np.frombuffer(in_data, dtype=np.int16)     # proces audio             ret, frame = cap.read()     gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)     image.set_array(gray)     # fig.canvas.draw()           # ax.plot([0,0],[max(data),max(data)],c='white')     # fig.canvas.flush_events()     # flag = pyaudio.paContinue       return (in_data, flag)   stream = p.open(     format = FORMAT,     channels = CHANNELS,     rate = RATE,     input = True,     input_device_index = 0,     output = False,     frames_per_buffer = CHUNK,     stream_callback=callback)   stream.start_stream()   while stream.is_active():     time.sleep(0.1)       cap.release() cv2.destroyAllWindows()       stream.stop_stream() stream.close()