Update app.py

app.py

@@ -1,15 +1,21 @@
 import cv2
 import streamlit as st
 
-cap = cv2.VideoCapture(1)
+cap = cv2.VideoCapture(0)
 
 st.title("Sign Language App")
 
 frame_placeholder = st.empty()
 
 stop_button_pressed = st.button("Stop")
-
+start_button_pressed = st.button("Start")
 while cap.isOpened() and not stop_button_pressed:
+    
+    while start_button_pressed:
+        if start_button_pressed:
+            break
+        continue
+        
     ret, frame = cap.read()
 
     if not ret: