app.py

import cv2
import streamlit as st
import time
from streamlit_webrtc import webrtc_streamer, WebRtcMode, RTCConfiguration

RTC_CONFIGURATION = RTCConfiguration(
    {"iceServers": [{"urls": ["stun:stun.l.google.com:19302"]}]}
)

webrtc_ctx = webrtc_streamer(
    key="WYH",
    mode=WebRtcMode.SENDRECV,
    rtc_configuration=RTC_CONFIGURATION,
    media_stream_constraints={"video": True, "audio": False},
    async_processing=False,
)

st.title("webcam live feed")
run = st.toggle('Start Webcam')
FRAME_WINDOW = st.image([])
camera = cv2.VideoCapture(0)
time.sleep(2)

if not camera.isOpened():
        print("Cannot open camera")
        exit()

while run:
    _, frame = camera.read()
    if not _:
        print("Can't receive frame (steam end?).Exiting ...")
        break
    else:
        #cc = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        FRAME_WINDOW.image(frame, channels = "BGR")
else:
    st.write('Stopped')