I can't get a screenshot of the area with this code

[wangbaoyi]

import obsws_python as obs
import numpy as np
import base64
import cv2
import sys
import time # 导入 time 模块

连接到 OBS WebSocket

cl = obs.ReqClient(host='192.168.31.38', port=9988, password="123456")

获取当前活动场景名称

current_scene = cl.get_current_program_scene().scene_name
print(f"当前活动场景名称: {current_scene}")

获取当前场景中的所有源名称

scene_items = cl.get_scene_item_list(current_scene).scene_items
print("当前场景中的源名称：", [item['sourceName'] for item in scene_items])

确保源名称正确

source = "aaa" # 更新为实际存在的源名称

while True:
try:
start_time = time.time() # 记录开始时间

    # 获取源截图
    Screenshot = cl.get_source_screenshot(source, "jpg", 416, 416, 30)
    Screenshot = Screenshot.image_data

    # 检查截图数据是否为空
    if not Screenshot:
        print("截图数据为空，可能源名称不正确或未能成功获取截图。")
        break

    # 去掉 base64 前缀
    if Screenshot.startswith("data:image/jpg;base64,"):
        Screenshot = Screenshot.replace("data:image/jpg;base64,", "")

    # 长度不为4整数倍的base64串需要用"='补全
    num = len(Screenshot) % 4
    if num != 0:
        Screenshot = Screenshot + '=' * (4 - num)
    
    # 解码图像数据
    img = base64.b64decode(Screenshot)
    img_array = np.frombuffer(img, np.uint8)
    img = cv2.imdecode(img_array, cv2.IMREAD_COLOR)
    #改变图片大小
    # img = cv2.resize(img, (640, 640))
    # 检查解码后的图像是否有效
    if img is None or img.size == 0:
        print("解码后的图像无效。")
        break
    
    # 实时显示图像
    cv2.imshow("img", img)
    # 将窗口移动到左上角
    cv2.moveWindow("img", 800, 0)
    
    # 记录结束时间并计算耗时
    end_time = time.time()
    elapsed_time_ms = (end_time - start_time) * 1000
    print(f"处理耗时: {elapsed_time_ms:.2f} ms")

    # 检查是否按下 'q' 键以退出
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
except Exception as e:
    print(f"获取源截图失败: {e}")
    break

cv2.destroyAllWindows() # 关闭所有 OpenCV 窗口