上期文章，我们分享了人脸468点的3D坐标检测的图片检测代码实现过程，我们我们介绍一下如何在实时视频中，进行人脸468点的坐标检测。

import cv2
import mediapipe as mp
mp_drawing = mp.solutions.drawing_utils
mp_face_mesh = mp.solutions.face_mesh
face_mesh = mp_face_mesh.FaceMesh(
min_detection_confidence=0.5, min_tracking_confidence=0.5)
drawing_spec = mp_drawing.DrawingSpec(thickness=2, circle_radius=1)
drawing_spec1 = mp_drawing.DrawingSpec(thickness=2, circle_radius=1,color=(255,255,255))
cap = cv2.VideoCapture(0)

对于实时视频，代码跟图片检测几乎一致，这里我们需要