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[tianyaoZhang]

Environment:

• Ubuntu 18.04
• ROS Melodic
• OpenCV 3.4.11
• python 2.7
• TensorFlow 1.13.1

Problem: I have followed the Step-by-Step Procedure, and built the environment successfully. However, when I start racing, what I got is shown as follow:

I noticed three Error information:

(1)

Traceback (most recent call last): File "/home/tyZhang/Documents/tyZhang/RPG/drone_racing_ws/catkin_ddr/src/sim2real_drone_racing/learning/deep_drone_racing_learning_node/nodes/deep_drone_racing_node.py", line 31, in run_network() File "/home/tyZhang/Documents/tyZhang/RPG/drone_racing_ws/catkin_ddr/src/sim2real_drone_racing/learning/deep_drone_racing_learning_node/nodes/deep_drone_racing_node.py", line 19, in run_network network.run(sess) File "/home/tyZhang/Documents/tyZhang/RPG/drone_racing_ws/catkin_ddr/src/sim2real_drone_racing/learning/deep_drone_racing_learning_node/src/Network/Network.py", line 82, in run cv_input_image = bridge.imgmsg_to_cv2(data_camera) File "/opt/ros/melodic/lib/python2.7/dist-packages/cv_bridge/core.py", line 163, in imgmsg_to_cv2 dtype, n_channels = self.encoding_to_dtype_with_channels(img_msg.encoding) File "/opt/ros/melodic/lib/python2.7/dist-packages/cv_bridge/core.py", line 99, in encoding_to_dtype_with_channels return self.cvtype2_to_dtype_with_channels(self.encoding_to_cvtype2(encoding)) File "/opt/ros/melodic/lib/python2.7/dist-packages/cv_bridge/core.py", line 91, in encoding_to_cvtype2 from cv_bridge.boost.cv_bridge_boost import getCvType ImportError: libopencv_core.so.3.2: cannot open shared object file: No such file or directory

(2)

ERROR: cannot launch node of type [joy/joy_node]: joy ROS path [0]=/opt/ros/melodic/share/ros .....

(3)

process[hummingbird/drone_racing_node-10]: started with pid [25991] /home/tyZhang/Documents/tyZhang/RPG/drone_racing_ws/catkin_ddr/devel/lib/drone_racing/drone_racing_node: error while loading shared libraries: libopencv_imgcodecs.so.3.2: cannot open shared object file: No such file or directory [hummingbird/drone_racing_node-10] process has died [pid 25991, exit code 127, cmd /home/tyZhang/Documents/tyZhang/RPG/drone_racing_ws/catkin_ddr/devel/lib/drone_racing/drone_racing_node image_rgb:=/hummingbird/rgb_camera/camera_1/image_raw camera_info:=/hummingbird/vi_sensor_1/camera_depth/depth/camera_info state_estimate:=odometry_sensor1/odometry __name:=drone_racing_node __log:=/home/tyZhang/.ros/log/0e72b08c-eb83-11ea-a3da-3497f6dc6705/hummingbird-drone_racing_node-10.log].

What should I do next? Thanks.

[antonilo]

You probably have a conflict between the opencv installed globally (Version 3.4) and the local opencv_bridge (Version 3.2). I would recommend downgrading opencv to 3.2

[raghada]

Same here, did you manage to solve it?

[raghada]

I'm using opencv 3.2 and I'm having the same issue