app.py

import gradio as gr
from deep_translator import GoogleTranslator
import os

def translate_srt_file(file):
    with open(file.name, "r", encoding="utf-8") as f:
        content = f.read()

    blocks = content.strip().split("\n\n")
    translated_blocks = []

    for block in blocks:
        lines = block.strip().split("\n")
        if len(lines) < 3:
            continue
        index = lines[0]
        timecode = lines[1]
        text_lines = lines[2:]

        original_text = " ".join(text_lines)
        try:
            translated_text = GoogleTranslator(source='en', target='bn').translate(original_text)
        except Exception as e:
            translated_text = original_text

        translated_block = f"{index}\n{timecode}\n{translated_text}"
        translated_blocks.append(translated_block)

    output_path = "translated_bn.srt"
    with open(output_path, "w", encoding="utf-8") as f:
        f.write("\n\n".join(translated_blocks))

    return output_path

title = "English ➜ Bengali Subtitle Translator"
description = "Upload an `.srt` subtitle file in English. This app will return a translated Bengali version."

gr.Interface(
    fn=translate_srt_file,
    inputs=gr.File(file_types=[".srt"], label="Upload English .srt file"),
    outputs=gr.File(label="Download Bengali .srt file"),
    title=title,
    description=description,
).launch()