Record voice with recorder.js and upload it to python-flask server, but WAV file is broken

I have this problem and it takes me 2 days for finding the solution :)) . In flask server you can use request.files['audio_data'] to get wav audio file. You can pass and use it as an audio variable too. Hope this can help you

For those who are still unable to figure it out after this. Just change the

main.py

#!/usr/bin/env python# -*- coding: utf-8 -*-from flask import Flaskfrom flask import requestfrom flask import render_templateimport osapp = Flask(__name__)@app.route("/", methods=['POST', 'GET'])def index():    if request.method == "POST":        f = request.files['audio_data']        with open('audio.wav', 'wb') as audio:            f.save(audio)        print('file uploaded successfully')        return render_template('index.html', request="POST")    else:        return render_template("index.html")if __name__ == "__main__":    app.run(debug=True)

Note:

Using ":" in the filename confuses ffmpeg/ffprobe (and it does not matter whether you use "" or ' to surround the file name, and backslash escaping does not work for ":"). The only possible solution is to [temporarily] remove ":" from the filename.