run_calibrate_camera: add an option '--no_gst' to disable gstreamer

If specified '--no_gst', then the camera device just be used by opencv
without any gstreamer components.

Signed-off-by: JoshWu <[email protected]>

Author: JoshWu

run_calibrate_camera.py

@@ -50,6 +50,9 @@ def main():
     parser.add_argument("-flip", "--flip", default=0, type=int,
                         help="flip method of the camera")
 
+    parser.add_argument("--no_gst", action="store_true",
+                        help="set true if not use gstreamer for the camera capture")
+
     args = parser.parse_args()
 
     if not os.path.exists(TARGET_DIR):
@@ -70,7 +73,9 @@ def main():
 
     device = args.input
     cap_thread = CaptureThread(device_id=device,
-                               flip_method=args.flip)
+                               flip_method=args.flip,
+                               use_gst=not args.no_gst,
+                               )
     buffer_manager = MultiBufferManager()
     buffer_manager.bind_thread(cap_thread, buffer_size=8)
     if cap_thread.connect_camera():

surround_view/capture_thread.py

@@ -14,6 +14,7 @@ def __init__(self,
                  drop_if_full=True,
                  api_preference=cv2.CAP_GSTREAMER,
                  resolution=None,
+                 use_gst=True,
                  parent=None):
         """
         device_id: device number of the camera.
@@ -26,6 +27,7 @@ def __init__(self,
         super(CaptureThread, self).__init__(parent)
         self.device_id = device_id
         self.flip_method = flip_method
+        self.use_gst = use_gst
         self.drop_if_full = drop_if_full
         self.api_preference = api_preference
         self.resolution = resolution
@@ -71,8 +73,11 @@ def run(self):
         qDebug("Stopping capture thread...")
 
     def connect_camera(self):
-        options = gstreamer_pipeline(cam_id=self.device_id, flip_method=self.flip_method)
-        self.cap.open(options, self.api_preference)
+        if self.use_gst:
+            options = gstreamer_pipeline(cam_id=self.device_id, flip_method=self.flip_method)
+            self.cap.open(options, self.api_preference)
+        else:
+            self.cap.open(self.device_id)
         # return false if failed to open camera
         if not self.cap.isOpened():
             qDebug("Cannot open camera {}".format(self.device_id))