Python Flask流媒体麦克风输入，如何使用IOS浏览器html5音频标记的范围标头分割流

2024-05-14 19:18:06 发布

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我正在尝试使用flask将Windows 10 PC上的麦克风输入流式传输到带有html5音频标签的基本网页，我的家庭网络上的桌面和Android浏览器都可以正常工作，但它不会流式传输到我的iPhone。我相信IOS需要使用范围标头。当尝试用iPhone浏览器打开流时，我可以看到它first requests bytes=0-1，但我无法只发送标头请求的流字节？下面是迄今为止我的服务器代码，它检查报头，但是如何仅返回范围报头请求的流字节

from flask import Flask, Response,render_template, request
import pyaudio
import re

app = Flask(__name__)

def genHeader(sampleRate, bitsPerSample, channels, samples):
    datasize = 10240000 # Some veeery big number here instead of: #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

FORMAT = pyaudio.paInt16
CHUNK = 1024 #1024
RATE = 44100
bitsPerSample = 16 #16
CHANNELS = 1
wav_header = genHeader(RATE, bitsPerSample, CHANNELS, CHUNK)

audio = pyaudio.PyAudio()

# start Recording
stream = audio.open(format=FORMAT, channels=CHANNELS,
    rate=RATE, input=True, input_device_index=1,
    frames_per_buffer=CHUNK)

@app.after_request
def after_request(response):
    response.headers.add('Accept-Ranges', 'bytes')
    return response

@app.route('/audio.wav')
def audio():
    range_header = request.headers.get('Range', None)
    print(range_header)
    byte1, byte2 = 0, None
    if range_header:
        match = re.search(r'(\d+)-(\d*)', range_header)
        groups = match.groups()

        if groups[0]:
            byte1 = int(groups[0])
        if groups[1]:
            byte2 = int(groups[1])
        print(str(byte1) + " " + str(byte2))
            
    # sound
    def sound():
        data = wav_header
        data += stream.read(CHUNK)
        yield(data)
        while True:
            data = stream.read(CHUNK)
            yield(data)
    resp = Response(sound(), mimetype="audio/x-wav")
    return resp


if __name__ == "__main__":
    app.run(host='0.0.0.0', debug=True, threaded=True,port=5000)

还有html

<!DOCTYPE html>
<html lang="en">
<head>
</head>
<body>
<audio controls>
<source src="http://192.168.8.10:5000/audio.wav" type="audio/x-wav">
Your browser does not support the audio element.
</audio>
</body>
</html>

Tags： toappdatabytesrequestdefasciiaudio
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