import numpy as np
import gradio as gr
import cv2

def to_black(image):
    output = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    return output

def clear_output(input_widget):
    input_widget = np.array([])

with gr.Blocks() as demo:
    gr.Markdown("Transfer image or video files using this demo.")
    with gr.Tabs():
        with gr.TabItem("Transfer Image"):
            with gr.Row():
                image_input = gr.Image()
                image_output = gr.Image()
            with gr.Row():
                image_button = gr.Button("Transfer")
                clear_image_button = gr.Button("Clear")
        with gr.TabItem("Transfer Video"):
            with gr.Row():
                video_input = gr.Video()
                video_output = gr.Video()
            with gr.Row():
                video_button = gr.Button("Transfer")
                clear_video_button = gr.Button("Clear")

    image_button.click(to_black, inputs=image_input, outputs=image_output)
    video_button.click(to_black, inputs=video_input, outputs=video_output)
    clear_image_button.click(clear_output, inputs=image_input,outputs=image_output)
    clear_video_button.click(clear_output, inputs=video_input,outputs=video_output)
demo.launch()

# 启动接口
#demo.launch(server_name='127.0.0.1',server_port=7788)