app.py

import gradio as gr
import yt_dlp

def download_media(url, download_video):
    if download_video:
        ydl_opts = {
            'format': 'bestvideo+bestaudio/best',
            'outtmpl': 'downloads/%(title)s.%(ext)s',
        }
    else:
        ydl_opts = {
            'format': 'bestaudio/best',
            'postprocessors': [{
                'key': 'FFmpegExtractAudio',
                'preferredcodec': 'mp3',
                'preferredquality': '192',
            }],
            'outtmpl': 'downloads/%(title)s.%(ext)s',
        }

    with yt_dlp.YoutubeDL(ydl_opts) as ydl:
        info_dict = ydl.extract_info(url, download=True)
        file_title = ydl.prepare_filename(info_dict)
        
        if download_video:
            output_file = file_title
        else:
            output_file = file_title.rsplit('.', 1)[0] + '.mp3'

    return output_file, download_video

def get_output_component(download_video):
    if download_video:
        return gr.File(label="Downloaded Media")
    else:
        return gr.Audio(label="Downloaded Media")

# Create the Gradio interface
with gr.Blocks() as demo:
    gr.Markdown("# YouTube Media Downloader")
    
    with gr.Row():
        url_input = gr.Textbox(label="YouTube URL")
        download_video_checkbox = gr.Checkbox(label="Download Video", value=False)
    with gr.Row():
        download_button = gr.Button("Download")

    with gr.Row():
    dynamic_output = gr.State()

    def update_output_component(download_video):
        return get_output_component(download_video)
    
    dynamic_output = download_video_checkbox.change(
        update_output_component, inputs=download_video_checkbox, outputs=dynamic_output
    )

    download_button.click(download_media, inputs=[url_input, download_video_checkbox], outputs=[dynamic_output, download_video_checkbox])

demo.launch()