Merge pull request neozhaoliang#66 from SLBiuBiu/master

Reduce camera bandwidth

Author: neozhaoliang

surround_view/capture_thread.py

@@ -88,6 +88,7 @@ def connect_camera(self):
                 width, height = self.resolution
                 self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
                 self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
+                self.cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*"MJPG"))
                 # some camera may become closed if the resolution is not supported
                 if not self.cap.isOpened():
                     qDebug("Resolution not supported by camera device: {}".format(self.resolution))
@@ -96,6 +97,7 @@ def connect_camera(self):
             else:
                 width = int(self.cap.get(cv2.CAP_PROP_FRAME_WIDTH))
                 height = int(self.cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
+                self.cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*"MJPG"))
                 self.resolution = (width, height)
 
         return True

test_cameras.py

@@ -55,6 +55,7 @@ def init_caps(cam_list, resolution=(1280,720)):
         cap = cv2.VideoCapture(iCam)
         cap.set(3, resolution[0])
         cap.set(4, resolution[1])
+        cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*"MJPG"))
         caps.append(cap)
 
     return caps