windows test

main.py

@@ -23,47 +23,35 @@ def save_config(cfg):
 
 CONFIG = load_config()
 
+
 def create_capture(index):
-    backends = []
 
-    if sys.platform == "darwin":
+    if os.name == "nt":
-        backends = [
+        cap = cv2.VideoCapture(index, cv2.CAP_DSHOW)
-            cv2.CAP_AVFOUNDATION,
-            cv2.CAP_ANY
-        ]
-    elif os.name == "nt":
-        backends = [
-            cv2.CAP_DSHOW,
-            cv2.CAP_MSMF,
-            cv2.CAP_ANY
-        ]
     else:
-        backends = [
+        cap = cv2.VideoCapture(index)
-            cv2.CAP_V4L2,
-            cv2.CAP_ANY
-        ]
 
-    for backend in backends:
+    if not cap.isOpened():
-        cap = cv2.VideoCapture(index, backend)
+        return None
 
-        if not cap.isOpened():
+    cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
-            continue
+    cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 720)
+    cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*'MJPG'))
 
-        for _ in range(10):
+    for _ in range(20):
-            ret, frame = cap.read()
+        ret, frame = cap.read()
-            if ret and frame is not None:
+        if ret and frame is not None:
-                return cap
+            return cap
-
-        cap.release()
 
+    cap.release()
     return None
 
+
 def find_cameras():
     working = []
 
-    for i in range(2):
+    for i in range(10):
         cap = create_capture(i)
-
         if cap is not None:
             working.append(i)
             cap.release()
@@ -123,6 +111,8 @@ class PhotoApp(QWidget):
     def init_camera(self):
         cams = find_cameras()
 
+        if not cams:
+            sys.exit(1)
         last = CONFIG.get("camera", {}).get("last_used")
 
         if last in cams:
@@ -134,6 +124,9 @@ class PhotoApp(QWidget):
                 QApplication.processEvents()
             cam_index = selector.selected
 
+        if cam_index is None:
+            sys.exit(1)
+
         CONFIG["camera"]["last_used"] = cam_index
         save_config(CONFIG)
 
@@ -142,12 +135,6 @@ class PhotoApp(QWidget):
         if self.cap is None:    
             sys.exit(1)
 
-        for _ in range(10):
-            self.cap.read()
-
-        if not self.cap.isOpened():
-            sys.exit(1)
-
     def update_frame(self):
         if not self.cap:
             return
@@ -175,7 +162,7 @@ class PhotoApp(QWidget):
         rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
         h, w, ch = rgb.shape
 
-        img = QImage(rgb.data, w, h, ch * w, QImage.Format.Format_RGB888)
+        img = QImage(rgb.data, w, h, ch * w, QImage.Format.Format_RGB888).copy()
         pix = QPixmap.fromImage(img)
 
         painter = QPainter(pix)