Python - Tengo un problema con un codigo de mediapipe

import cv2

import mediapipe as mp

import time

import math

class poseDetector():

    def __init__(self, mode=False, upBody=False, smooth=True,

                 detectionCon=0.5, trackCon=0.5):

        self.mode = mode

        self.upBody = upBody

        self.smooth = smooth

        self.detectionCon = detectionCon

        self.trackCon = trackCon

        self.mpDraw = mp.solutions.drawing_utils

        self.mpPose = mp.solutions.pose

        self.pose = self.mpPose.Pose(self.mode, self.upBody, self.smooth,self.detectionCon, self.trackCon)

    def findPose(self, img, draw=True):

        imgRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

        self.results = self.pose.process(imgRGB)

        if self.results.pose_landmarks:

            if draw:

                self.mpDraw.draw_landmarks(img, self.results.pose_landmarks,self.mpPose.POSE_CONNECTIONS)

        return img

    def findPosition(self, img, draw=True):

        self.lmList = []

        if self.results.pose_landmarks:

            for id, lm in enumerate(self.results.pose_landmarks.landmark):

                h, w, c = img.shape

                # print(id, lm)

                cx, cy = int(lm.x * w), int(lm.y * h)

                self.lmList.append([id, cx, cy])

                if draw:

                    cv2.circle(img, (cx, cy), 5, (255, 0, 0), cv2.FILLED)

        return self.lmList

    def findAngle(self, img, p1, p2, p3, draw=True):

        # Get the landmarks

        x1, y1 = self.lmList[p1][1:]

        x2, y2 = self.lmList[p2][1:]

        x3, y3 = self.lmList[p3][1:]

        # Calculate the Angle

        angle = math.degrees(math.atan2(y3 - y2, x3 - x2) -

                             math.atan2(y1 - y2, x1 - x2))

        if angle < 0:

            angle += 360

        # print(angle)

        # Draw

        if draw:

            cv2.line(img, (x1, y1), (x2, y2), (255, 255, 255), 3)

            cv2.line(img, (x3, y3), (x2, y2), (255, 255, 255), 3)

            cv2.circle(img, (x1, y1), 10, (0, 0, 255), cv2.FILLED)

            cv2.circle(img, (x1, y1), 15, (0, 0, 255), 2)

            cv2.circle(img, (x2, y2), 10, (0, 0, 255), cv2.FILLED)

            cv2.circle(img, (x2, y2), 15, (0, 0, 255), 2)

            cv2.circle(img, (x3, y3), 10, (0, 0, 255), cv2.FILLED)

            cv2.circle(img, (x3, y3), 15, (0, 0, 255), 2)

            cv2.putText(img, str(int(angle)), (x2 - 50, y2 + 50),

                        cv2.FONT_HERSHEY_PLAIN, 2, (0, 0, 255), 2)

        return angle

def main():

    cap = cv2.VideoCapture("PoseVideos/Boy.mp4")

    pTime = 0

    detector = poseDetector()

    while True:

        success, img = cap.read()

        img = detector.findPose(img)

        lmList = detector.findPosition(img, draw=False)

        if len(lmList) != 0:

            print(lmList[14])

            cv2.circle(img, (lmList[14][1], lmList[14][2]), 15, (0, 0, 255), cv2.FILLED)

        cTime = time.time()

        fps = 1 / (cTime - pTime)

        pTime = cTime

        cv2.putText(img, str(int(fps)), (70, 50), cv2.FONT_HERSHEY_PLAIN, 3,

                    (255, 0, 0), 3)

        cv2.imshow("Image", img)

        cv2.waitKey(1)

if __name__ == "__main__":

    main()