我目前正在使用Python和Flask实现一个简单的流媒体web应用程序。 似乎我无法将服务器麦克风输入的实时录制音频流式传输到网页。
服务器.py
from flask import Flask, render_template, Response
import cv2
import framework
import pyaudio
import audio_processing as audioRec
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 1024
audio = pyaudio.PyAudio()
app = Flask(__name__)
@app.route('/')
def index():
"""Video streaming home page."""
return render_template('index.html')
# Stream routing
@app.route('/video_feed')
def video_feed():
"""Video streaming route. Put this in the src attribute of an img tag."""
return Response(generateVideo(),
mimetype='multipart/x-mixed-replace; boundary=frame')
@app.route("/audio_feed")
def audio_feed():
"""Audio streaming route. Put this in the src attribute of an audio tag."""
return Response(generateAudio(),
mimetype="audio/x-wav")
# Stream generating
def generateVideo():
"""Video streaming generator function."""
cap = cv2.VideoCapture(0)
while (cap.isOpened()):
ret, frame = cap.read()
output = framework.streamer(frame, 'final')
cv2.imwrite('signals/currFrame.jpg', output)
yield (b'--frame\r\n'
b'Content-Type: image/jpeg\r\n\r\n' + open('signals/currFrame.jpg', 'rb').read() + b'\r\n')
def generateAudio():
"""Audio streaming generator function."""
currChunk = audioRec.record()
data_to_stream = genHeader(44100, 32, 1, 200000) + currChunk
yield data_to_stream
# with open("signals/audio.wav", "rb") as fwav:
# data = fwav.read(1024)
# while data:
# yield data
# data = fwav.read(1024)
def genHeader(sampleRate, bitsPerSample, channels, samples):
datasize = samples * channels * bitsPerSample // 8
o = bytes("RIFF",'ascii') # (4byte) Marks file as RIFF
o += (datasize + 36).to_bytes(4,'little') # (4byte) File size in bytes excluding this and RIFF marker
o += bytes("WAVE",'ascii') # (4byte) File type
o += bytes("fmt ",'ascii') # (4byte) Format Chunk Marker
o += (16).to_bytes(4,'little') # (4byte) Length of above format data
o += (1).to_bytes(2,'little') # (2byte) Format type (1 - PCM)
o += (channels).to_bytes(2,'little') # (2byte)
o += (sampleRate).to_bytes(4,'little') # (4byte)
o += (sampleRate * channels * bitsPerSample // 8).to_bytes(4,'little') # (4byte)
o += (channels * bitsPerSample // 8).to_bytes(2,'little') # (2byte)
o += (bitsPerSample).to_bytes(2,'little') # (2byte)
o += bytes("data",'ascii') # (4byte) Data Chunk Marker
o += (datasize).to_bytes(4,'little') # (4byte) Data size in bytes
return o
if __name__ == '__main__':
app.run(host='0.0.0.0', debug=True, threaded=True)
音频处理.py
import pyaudio
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 1024
audio = pyaudio.PyAudio()
def record():
# start Recording
stream = audio.open(format=FORMAT, channels=CHANNELS,
rate=RATE, input=True,
frames_per_buffer=CHUNK)
# print "recording..."
data = stream.read(CHUNK)
return data
我正在尝试使用audio_processing.py获取麦克风的当前块,并使用yield将当前样本响应给用户。视频流工作得很好。 谁知道,我做错什么了?
谨致问候, 费利克斯
下面是一个使用设备内置麦克风的工作示例: 很抱歉,无法解释太多,但这是我为我的应用程序找到的!
应用程序.py
index.html-当前目录中模板文件夹下
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