采集卡bug修复

utils/get_image.py

@@ -45,16 +45,21 @@ import warnings
 
 # 抑制OpenCV的警告信息（兼容不同版本）
 import os
-os.environ['OPENCV_LOG_LEVEL'] = 'ERROR'
+import sys
+import io
+os.environ['OPENCV_LOG_LEVEL'] = 'SILENT'
+os.environ['OPENCV_IO_ENABLE_OPENEXR'] = '0'
+
 try:
     if hasattr(cv2, 'setLogLevel'):
-        # OpenCV 4.x
-        if hasattr(cv2, 'LOG_LEVEL_ERROR'):
+        if hasattr(cv2, 'LOG_LEVEL_SILENT'):
+            cv2.setLogLevel(cv2.LOG_LEVEL_SILENT)
+        elif hasattr(cv2, 'LOG_LEVEL_ERROR'):
             cv2.setLogLevel(cv2.LOG_LEVEL_ERROR)
         elif hasattr(cv2, 'utils'):
-            cv2.utils.setLogLevel(0)  # 0=ERROR级别
+            cv2.utils.setLogLevel(0)
 except Exception:
-    pass  # 如果设置失败，继续执行
+    pass
 
 class GetImage:
     def __init__(self, cam_index=0, width=1920, height=1080):
@@ -71,32 +76,42 @@ class GetImage:
             (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()
+        # 重定向stderr来抑制OpenCV的错误输出
+        old_stderr = sys.stderr
+        suppressed_output = io.StringIO()
+        
+        try:
+            sys.stderr = suppressed_output
+            
+            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
-            except Exception as e:
-                if self.cap:
-                    try:
-                        self.cap.release()
-                    except:
-                        pass
-                    self.cap = None
-                continue
+                    continue
+        finally:
+            # 恢复stderr
+            sys.stderr = old_stderr
         
         if self.cap is None or not self.cap.isOpened():
             print(f"❌ 无法打开采集卡 {cam_index}")