我是新來的,希望我的問題就在這裏。 我想編程一個GUI,我可以從麥克風錄製一些聲音並實時繪製它,以查看聲音的左右聲道。Matplotlib-PyQt5中的圖表在運行時沒有更新
我使用PyQt 5作爲我的GUI和Matplotlib-FigureCanvas作圖。 流媒體工作正常,但是Plot僅在錄製停止後顯示,並且在錄製期間不會更新,就像它應該一樣。 在調試模式下,我可以在每次更新時看到圖表,但是當我運行代碼時,GUI會凍結,直到錄製完成。 就是這樣,因爲繪圖太慢了? 我嘗試了使用動畫或線程的不同方法,但到目前爲止沒有任何工作。
我想最終有一個實時更新的陰謀,我該怎麼做到這一點?還有更長的錄音?
我希望有人能幫助我,在此先感謝!
這裏是我的代碼,在那裏我記錄並繪製出部分:
import sys
from PyQt5 import QtGui, QtWidgets, QtCore
import numpy as np
import time
import pyaudio
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
import matplotlib.gridspec as gridspec
import matplotlib.animation as animation
class Window(QtWidgets.QMainWindow):
def __init__(self): # sort of template for rest of GUI, is always there, menubar/ mainmenu eg.
super(Window, self).__init__()
self.setGeometry(50, 50, 1500, 900)
self.setWindowTitle("PyQt Tutorial!")
self.centralwidget = QtWidgets.QWidget(self)
self.centralwidget.setObjectName("centralwidget")
self.channels = 2
self.fs = 44100 # samplerate
self.Chunks = 1024
self.tapeLength = 2 # seconds
self.tape = np.empty(self.fs * self.tapeLength) * np.nan # tapes where recorded audio is stored
self.taper = np.empty(self.fs * self.tapeLength) * np.nan
self.tapel = np.empty(self.fs * self.tapeLength) * np.nan
self.home()
def home(self):
btn = QtWidgets.QPushButton("Stream and Plot", self) # Button to start streaming
btn.clicked.connect(self.plot)
btn.resize(btn.sizeHint())
btn.move(100, 100)
self.scrollArea = QtWidgets.QScrollArea(self)
self.scrollArea.move(75, 400)
self.scrollArea.resize(600, 300)
self.scrollArea.setWidgetResizable(False)
self.scrollArea2 = QtWidgets.QScrollArea(self)
self.scrollArea2.move(775, 400)
self.scrollArea2.resize(600, 300)
self.scrollArea2.setWidgetResizable(False)
self.scrollArea.horizontalScrollBar().valueChanged.connect(self.scrollArea2.horizontalScrollBar().setValue)
self.scrollArea2.horizontalScrollBar().valueChanged.connect(self.scrollArea.horizontalScrollBar().setValue)
self.figure = Figure((15, 2.8), dpi=100) # figure instance (to plot on) F(width, height, ...)
self.canvas = FigureCanvas(self.figure)
self.scrollArea.setWidget(self.canvas)
self.toolbar = NavigationToolbar(self.canvas, self.scrollArea)
self.canvas2 = FigureCanvas(self.figure)
self.scrollArea2.setWidget(self.canvas2)
self.toolbar2 = NavigationToolbar(self.canvas2, self.scrollArea2)
self.gs = gridspec.GridSpec(1, 1)
self.ax = self.figure.add_subplot(self.gs[0])
self.ax2 = self.figure.add_subplot(self.gs[0])
self.figure.subplots_adjust(left=0.05)
self.ax.clear()
def start_streamsignal(self, start=True):
# open and start the stream
if start is True:
print("start Signals")
self.p = pyaudio.PyAudio()
self.stream = self.p.open(format=pyaudio.paFloat32, channels=self.channels, rate=self.fs, input_device_index=1,
output_device_index=5, input=True, frames_per_buffer=self.Chunks)
print("recording...")
def start_streamread(self):
"""return values for Chunks of stream"""
data = self.stream.read(self.Chunks)
npframes2 = np.array(data).flatten()
npframes2 = np.fromstring(npframes2, dtype=np.float32)
norm_audio2 = (npframes2/np.max(np.abs(npframes2))) # normalize
left2 = norm_audio2[::2]
right2 = norm_audio2[1::2]
print(norm_audio2)
return left2, right2
def tape_add(self):
"""add chunks to tape"""
self.tape[:-self.Chunks] = self.tape[self.Chunks:]
self.taper = self.tape
self.tapel = self.tape
self.taper[-self.Chunks:], self.tapel[-self.Chunks:] = self.start_streamread()
def plot(self, use_blit=True):
# Plot the Tape and update chunks
print('Plotting')
self.start_streamsignal(start=True)
start = True
for duration in range(0, 15, 1):
plotsec = 1
time.sleep(2)
self.timeArray = np.arange(self.taper.size)
self.timeArray = (self.timeArray/self.fs) * 1000 # scale to milliseconds
self.tape_add()
# self.canvas.draw()
while start is True and plotsec < 3:
# self.ani = animation.FuncAnimation(self.figure, self.animate, interval=25, blit=True)
self.ax2.plot(self.taper, '-b')
self.canvas.draw()
self.ax2.clear()
self.ax2.plot(self.tapel, 'g-')
self.canvas2.draw()
plotsec += 1
def animate(self):
self.line.set_xdata(self.taper)
return self.line,
def main():
app = QtWidgets.QApplication(sys.argv)
GUI = Window()
GUI.show()
sys.exit(app.exec_())
main()
認沽''QApplication.processEvents在環()。 – Chris
或用'canvas2.draw_idle()'替換'canvas2.draw()'。無論如何,代碼太大,無法調試。如果上述任何評論無法解決您的問題,請嘗試撰寫一個有關問題的最簡單示例。 SO不打算用於在100行代碼上尋求幫助。 –
@Chris,這段小小的代碼('QtWidgets.QApplication.processEvents()')使程序工作起來應該是完美的。非常感謝你。 – Audiosnow