app.py

import gradio as gr
import cv2
import numpy as np

def apply_filter(frame):
    # frame is a numpy array (H, W, 3) in RGB
    img = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)

    # Example filter: invert colors
    img = cv2.bitwise_not(img)

    # Convert back to RGB for display
    return cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

iface = gr.Interface(
    fn=apply_filter,
    inputs=gr.Video(source="webcam", streaming=True),
    outputs="video",
    live=True,
)

iface.launch()