app.py

import torch
# from PIL import Image
import gradio as gr
import yt_dlp as youtube_dl # 用 yt_dlp 代替 pytube
from transformers import pipeline

MODEL_NAME = "openai/whisper-large-v3"
device = 0 if torch.cuda.is_available() else "cpu"
pipe = pipeline(
    task="automatic-speech-recognition",
    model=MODEL_NAME,
    chunk_length_s=30,
    device=device,
)

all_special_ids = pipe.tokenizer.all_special_ids
transcribe_token_id = all_special_ids[-5]
translate_token_id = all_special_ids[-6]

def transcribe(microphone, file_upload, task):
    warn_output = ""
    if (microphone is not None) and (file_upload is not None):
        warn_output = (
            "警告：您已经上传了一个音频文件并使用了麦克录制。 "
            "录制文件将被使用上传的音频将被丢弃。"
        )
    elif (microphone is None) and (file_upload is None):
        return "错误: 您必须使用麦克风录制或上传音频文件"

    file = microphone if microphone is not None else file_upload
    pipe.model.config.forced_decoder_ids = [
        [2, transcribe_token_id if task == "transcribe" else translate_token_id]
    ]
    # text = pipe(file, return_timestamps=True)["text"]
    text = pipe(file, return_timestamps=True)
    # trans to SRT
    text = convert_to_srt(text)
    return warn_output + text

def _return_yt_html_embed(yt_url):
    video_id = yt_url.split("?v=")[-1]
    HTML_str = (
        f'<center> <iframe width="500" height="320" src="https://www.youtube.com/embed/{video_id}"> </iframe>'
        " </center>"
    )
    return HTML_str

def yt_transcribe(yt_url, task):
    # yt = pt.YouTube(yt_url) # 用 yt_dlp 代替 pytube
    ydl = youtube_dl.YoutubeDL({"format": "bestaudio"}) # 创建 yt_dlp 对象
    info = ydl.extract_info(yt_url, download=False) # 提取视频信息
    audio_url = info["formats"][0]["url"] # 获取音频链接
    html_embed_str = _return_yt_html_embed(yt_url)
    # stream = yt.streams.filter(only_audio=True)[0]
    # stream.download(filename="audio.mp3")
    ydl.download([audio_url]) # 下载音频文件
    pipe.model.config.forced_decoder_ids = [
        [2, transcribe_token_id if task == "transcribe" else translate_token_id]
    ]
    text = pipe("audio.mp3", return_timestamps=True)
    # text = pipe("audio.mp3", return_timestamps=True)["text"]
    # trans to SRT
    text = convert_to_srt(text)
    return html_embed_str, text

# Assuming srt format is a sequence of subtitles with index, time range and text
def convert_to_srt(input):
    output = ""
    index = 1
    for chunk in input["chunks"]:
        start, end = chunk["timestamp"]
        text = chunk["text"]
        if end is None:
            end = "None"
        # Convert seconds to hours:minutes:seconds,milliseconds format
        start = format_time(start)
        end = format_time(end)
        output += f"{index}\n{start} --> {end}\n{text}\n\n"
        index += 1
    return output

# Helper function to format time
def format_time(seconds):
    if seconds == "None":
        return seconds
    hours = int(seconds // 3600)
    minutes = int((seconds % 3600) // 60)
    seconds = int(seconds % 60)
    milliseconds = int((seconds % 1) * 1000)
    return f"{hours:02}:{minutes:02}:{seconds:02},{milliseconds:03}"

demo = gr.Blocks()
mf_transcribe = gr.Interface(
    fn=transcribe,
    inputs=[
        gr.inputs.Audio(source="microphone", type="filepath", optional=True),
        gr.inputs.Audio(source="upload", type="filepath", optional=True),
        gr.inputs.Radio(["transcribe", "translate"], label="Task", default="transcribe"),
    ],
    outputs="text",
    layout="horizontal",
    theme="huggingface",
    title="Audio-to-Text-SRT 自动生成字幕",
    description=(
        "直接在网页录音或上传音频文件，加入Youtube连接，轻松转换为文字和字幕格式! 本演示采用"
        f" 模型 [{MODEL_NAME}](https://huggingface.co./{MODEL_NAME}) 和 🤗 Transformers 转换任意长度的"
        "音视频文件!使用GPU转换效率会大幅提高，大约每小时 $0.6 约相当于人民币 5 元。 如果您有较长内容,需要更快的转换速度，请私信作者微信 1259388，并备注“语音转文字”"
    ),
    allow_flagging="never",
)
yt_transcribe = gr.Interface(
    fn=yt_transcribe,
    inputs=[
        gr.inputs.Textbox(lines=1, placeholder="Paste the URL to a YouTube video here", label="YouTube URL"),
        gr.inputs.Radio(["转译", "翻译"], label="Task", default="transcribe")
    ],
    outputs=["html", "text"],
    layout="horizontal",
    theme="huggingface",
    title="Audio-to-Text-SRT 自动生成字幕",
    description=(
      "直接在网页录音或上传音频文件，加入Youtube连接，轻松转换为文字和字幕格式! 本演示采用"
        f" 模型 [{MODEL_NAME}](https://huggingface.co./{MODEL_NAME}) 和 🤗 Transformers 转换任意长度的"
        "音视频文件!使用GPU转换效率会大幅提高，大约每小时 $0.6 约相当于人民币 5 元。 如果您有较长内容,需要更快的转换速度，请私信作者微信 1259388，并备注“语音转文字”"
    ),
    allow_flagging="never",
)

# # Load the images
# image1 = Image("wechatqrcode.jpg")
# image2 = Image("paypalqrcode.png")

# # Define a function that returns the images and captions
# def display_images():
#     return image1, "WeChat Pay", image2, "PayPal"

with demo:
    gr.TabbedInterface([mf_transcribe, yt_transcribe], ["转译音频成文字", "YouTube转字幕"])
# Create a gradio interface with no inputs and four outputs
# gr.Interface(display_images, [], [gr.outputs.Image(), gr.outputs.Textbox(), gr.outputs.Image(), gr.outputs.Textbox()], layout="horizontal").launch()
demo.launch(enable_queue=True)