采集卡bug修复

utils/get_image.py

@@ -41,26 +41,76 @@ import cv2
 #     cv2.destroyAllWindows()
 
 import threading
+import warnings
+
+# 抑制OpenCV的警告信息
+import os
+os.environ['OPENCV_LOG_LEVEL'] = 'ERROR'
+cv2.setLogLevel(cv2.LOG_LEVEL_ERROR)
 
 class GetImage:
     def __init__(self, cam_index=0, width=1920, height=1080):
         print(f"🔧 正在初始化采集卡 {cam_index}...")
-        self.cap = cv2.VideoCapture(cam_index, cv2.CAP_DSHOW)
-        if not self.cap.isOpened():
-            print(f"⚠️ DSHOW模式失败，尝试默认模式...")
-            self.cap = cv2.VideoCapture(cam_index)
-        
-        if not self.cap.isOpened():
-            print(f"❌ 无法打开采集卡 {cam_index}")
-            self.cap = None
-            return
-            
-        self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
-        self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
+        self.cap = None
         self.frame = None
         self.running = True
         self.cam_index = cam_index
         
+        # 尝试多种方式打开采集卡
+        backends_to_try = [
+            (cam_index, cv2.CAP_DSHOW),
+            (cam_index, cv2.CAP_ANY),
+            (cam_index, None),  # 默认后端
+        ]
+        
+        for idx, backend in backends_to_try:
+            try:
+                with warnings.catch_warnings():
+                    warnings.filterwarnings('ignore', category=UserWarning)
+                    if backend is not None:
+                        self.cap = cv2.VideoCapture(idx, backend)
+                    else:
+                        self.cap = cv2.VideoCapture(idx)
+                
+                if self.cap.isOpened():
+                    # 测试读取一帧
+                    ret, test_frame = self.cap.read()
+                    if ret and test_frame is not None:
+                        print(f"✅ 采集卡 {cam_index} 打开成功")
+                        break
+                    else:
+                        self.cap.release()
+                        self.cap = None
+            except Exception as e:
+                if self.cap:
+                    try:
+                        self.cap.release()
+                    except:
+                        pass
+                    self.cap = None
+                continue
+        
+        if self.cap is None or not self.cap.isOpened():
+            print(f"❌ 无法打开采集卡 {cam_index}")
+            print("请检查：")
+            print("  1. 采集卡是否正确连接")
+            print("  2. 采集卡索引是否正确（尝试扫描采集卡）")
+            print("  3. 采集卡驱动是否安装")
+            print("  4. 采集卡是否被其他程序占用")
+            self.cap = None
+            return
+        
+        # 设置分辨率
+        try:
+            self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
+            self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
+            # 实际获取设置后的分辨率
+            actual_width = int(self.cap.get(cv2.CAP_PROP_FRAME_WIDTH))
+            actual_height = int(self.cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
+            print(f"   分辨率设置: {width}x{height} -> 实际: {actual_width}x{actual_height}")
+        except Exception as e:
+            print(f"⚠️ 设置分辨率失败: {e}")
+        
         # 启动更新线程
         threading.Thread(target=self.update, daemon=True).start()
         
@@ -71,11 +121,18 @@ class GetImage:
 
     def update(self):
         while self.running and self.cap is not None:
-            ret, frame = self.cap.read()
-            if ret:
-                self.frame = frame
-            else:
-                print(f"⚠️ 采集卡 {self.cam_index} 读取失败")
+            try:
+                ret, frame = self.cap.read()
+                if ret and frame is not None:
+                    self.frame = frame
+                else:
+                    # 读取失败时不打印，避免刷屏
+                    pass
+            except Exception as e:
+                # 只在异常时打印错误
+                print(f"⚠️ 采集卡 {self.cam_index} 读取异常: {e}")
+                import time
+                time.sleep(0.1)  # 出错时短暂延迟
 
     def get_frame(self):
         if self.cap is None or self.frame is None: