import cv2
import mediapipe as mp

ESC = 27

mp_drawing = mp.solutions.drawing_utils
mp_pose = mp.solutions.pose

cap = cv2.VideoCapture(0)
ratio = cap.get(cv2.CAP_PROP_FRAME_WIDTH) / cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
WIDTH = 400
HEIGHT = int(WIDTH / ratio)

pose = mp_pose.Pose(min_detection_confidence = 0.5, min_tracking_confidence = 0.5)
                    
while cap.isOpened():
    ret, frame = cap.read()
    frame = cv2.resize(frame, (WIDTH, HEIGHT))
    frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
    frame.flags.writeable = False
    results = pose.process(frame)
    frame.flags.writeable = True
    frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)
    mp_drawing.draw_landmarks(frame,
                       results.pose_landmarks,
                       mp_pose.POSE_CONNECTIONS)
    cv2.imshow('MediaPipe Pose', frame)

    if cv2.waitKey(1) == ESC:
        break

cap.release()
cv2.destroyAllWindows()