app.py

import gradio as gr
import cv2

def greet(image):
    cap = cap = cv2.VideoCapture(video)
    succes, img = vidcap.read()
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    return gray
    
iface = gr.Interface(
fn=greet, 
inputs=gr.Video(source "webcam", format "mp4", streaming = "True"),  
outputs="image"
)

iface.launch()