How to properly use for loop in order to get full text out of transcribed .wav file in Flask

Question

I'm trying to get the content out of the audio file using for loop to iterate through content of the file but what I get is the last line of the text. I'm sure the problem is in the main code which is main.py and I can't figure out what could go wrong. Here is some code:

from flask import Flask, render_template, request, redirect
from google.cloud import speech
import os

os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 'PATH'
app = Flask(__name__)

@app.route("/", methods=["GET", "POST"])
def index():        

    if request.method == "POST":
        if "file" not in request.files:
            return redirect(request.url)

        file = request.files["file"]
        if file.filename == "":
            return redirect(request.url)
          
        if file:
            client = speech.SpeechClient()

            config = speech.RecognitionConfig(
            encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
            sample_rate_hertz=8000,
            language_code="en-US",
            )  
         
            content = request.files['file'].read()
            audio = speech.RecognitionAudio(content=content)
            response = client.recognize(config=config, audio=audio)

            for result in response.results:
                text = result.alternatives[0].transcript
   
    return render_template('index.html', text=text)


if __name__ == "__main__":
    app.run(debug=True)

score 0 · Answer 1 · answered Jan 23 '21 at 23:13

The problem is in this line:

for result in response.results:
    text = result.alternatives[0].transcript

Text is always the last one. What you can do is append text to a list and return the list like this

lines = []
for result in response.results:
    text = result.alternatives[0].transcript
    lines.append(text)

And change the return to

return render_template('index.html', text=lines)

And don't forget to add a for loop in your jinja template to work with the returned list.

How to properly use for loop in order to get full text out of transcribed .wav file in Flask

1 Answers1