app.py

import gradio as gr
import torch
from transformers import pipeline
import os

# Initialize the Whisper ASR model
api_key = os.getenv("HF_TOKEN")
whisper_asr_trained = pipeline(
    "automatic-speech-recognition", 
    model="shijunju/whisper_turbo_1202", 
    chunk_length_s=30,  # do not make it over 30
    device="cuda" if torch.cuda.is_available() else "cpu"
)

def transcribe_speech(filepath):
    if filepath is None:
        return "No audio found, please upload a file.", None

    # Process the audio file and get the transcription
    try:
        output = whisper_asr_trained(filepath, return_timestamps=True)

        # Extract and format the transcribed text
        if isinstance(output, dict) and "chunks" in output:
            transcribed_text = "\n\n".join([str(chunk['timestamp']) + '\n' + chunk["text"] for chunk in output["chunks"]])
        else:
            transcribed_text = output.get("text", str(output))
        
        # Save the transcription to a text file
        text_file_path = "transcription.txt"
        with open(text_file_path, "w") as text_file:
            text_file.write(transcribed_text)
        
        return transcribed_text, text_file_path
    except Exception as e:
        return f"Error during transcription: {str(e)}", None

# Create Gradio interface
with gr.Blocks() as demo:
    gr.Markdown("## Finetuned Whisper Turbo Speech to Text (CPU, each run takes about 2 min)")
    
    with gr.Row():
        audio_input = gr.Audio(type="filepath", label="Upload MP3 or WAV File")
        transcribe_button = gr.Button("Transcribe Audio")
    
    with gr.Row():
        output_textbox = gr.Textbox(label="Transcribed Text", lines=10)
        download_link = gr.File(label="Download Transcription")


    def update_output(filepath):
 
        transcribed_text, text_file_path = transcribe_speech(filepath)

        return transcribed_text, text_file_path
    
    transcribe_button.click(
        fn=update_output, 
        inputs=audio_input, 
        outputs=[output_textbox, download_link]
    )

# Launch the Gradio app
demo.launch()