用Python写一个将rtsp流媒体视频数据存入MySQL中的代码，再从MySQL中读取出来保存到本地并播放

以下是Python代码，可以将rtsp流媒体视频数据存入MySQL中，并从MySQL中读取出来保存到本地并播放：

import cv2
import mysql.connector

# 连接MySQL数据库
mydb = mysql.connector.connect(
  host="localhost",
  user="yourusername",
  password="yourpassword",
  database="mydatabase"
)

# 创建表
mycursor = mydb.cursor()
mycursor.execute("CREATE TABLE IF NOT EXISTS videos (id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255), data LONGBLOB)")

# 读取rtsp流媒体视频数据
cap = cv2.VideoCapture("rtsp://example.com/stream")
ret, frame = cap.read()
if ret:
    # 将视频数据存入MySQL
    name = "video1"
    data = cv2.imencode('.jpg', frame)[1].tobytes()
    sql = "INSERT INTO videos (name, data) VALUES (%s, %s)"
    val = (name, data)
    mycursor.execute(sql, val)
    mydb.commit()
    print(mycursor.rowcount, "record inserted.")
    cap.release()

# 从MySQL中读取视频数据并保存到本地
mycursor.execute("SELECT data FROM videos WHERE name = 'video1'")
myresult = mycursor.fetchone()
if myresult:
    data = myresult[0]
    with open("video1.mp4", "wb") as f:
        f.write(data)

# 播放本地视频
cap = cv2.VideoCapture("video1.mp4")
while True:
    ret, frame = cap.read()
    if not ret:
        break
    cv2.imshow("video", frame)
    if cv2.waitKey(1) == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

注意：在运行代码之前，需要先安装OpenCV和mysql-connector-python库。