Lanching with multiple camera_nodelet_manager gives erratic behavior

[Thomas-Merlet]

Hi,

I've been struggling to launch multiple cameras using this node.

After some investigation, it appears that launching the node with multiple camera_nodelet_manager was causing the issue.
Doing so, the ROS driver will either:

• Work as expected
• Ouptut one of the following errors
  Failed to connect with error: [SpinnakerCamera::connect] Failed to connect to camera. Error: Spinnaker: Camera is not communicating in U3V protocol. [-1015]
[SpinnakerCamera::grabImage] Failed to retrieve buffer with error: Spinnaker: Failed waiting for EventData on NEW_BUFFER_DATA event. [-1011]
• Make the entire PC crash on startup

This is unconsistent with the comment in the stereo.launch file ( Both cameras are not loaded into one nodelet manager to avoid the namespacing issue.), algouth it's not was is done in this launch file. Launching multiple camera.launch causes the problem. Following the stereo.launch layout and expending it for multiple cameras solved the issue.

Details:

• flir_camera_driver: 2.0.3
• spinnaker 2.5.0.80
• OS: Ubuntu 18.04 LTS (ROS Melodic)

Thanks

[MathiasStokholm]

@Thomas-Merlet I've seen this behavior when trying to run while a newer version of the Spinnaker SDK is installed. Can you try just uninstalling the SDK and reconfiguring + compiling?

[Thomas-Merlet]

@MathiasStokholm Yes, I've actually encountered this problem on multiple computer, with different installation. I was using Spinnaker SDK 2.5.0.80 for my tests.