ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange
Ask Your Question

umd_camera process dies

asked 2011-03-02 21:12:42 -0500

Prasad gravatar image


My process of umd_camera dies after executing roslaunch uvc_camera camera_node.launch

The log file is like below:

[roscpp_internal] [2011-03-03 16:25:48,161] [thread 0xb6b41920]: [DEBUG] UDPROS server listening on port [52547]
[roscpp_internal] [2011-03-03 16:25:48,170] [thread 0xb6b41920]: [DEBUG] Started node [/uvc_camera], pid [5366], bound on [rootx-laptop], xmlrpc port [59715], tcpros port [42953], logging to [/home/rootx/.ros/log/cb97488a-4584-11e0-85fd-f04da28296e0/uvc_camera-2.log], using [real] time
[roscpp_internal] [2011-03-03 16:25:48,180] [thread 0xb6b41920]: [DEBUG] XML-RPC call [getParam] returned an error (-1): [Parameter [/uvc_camera/num_worker_threads] is not set]
[roscpp_internal] [2011-03-03 16:25:48,238] [thread 0xb6b40b70]: [DEBUG] Accepted connection on socket [7], new socket [11]
[roscpp_internal] [2011-03-03 16:25:48,238] [thread 0xb6b40b70]: [DEBUG] TCPROS received a connection from []
[roscpp_internal] [2011-03-03 16:25:48,238] [thread 0xb6b40b70]: [DEBUG] Connection: Creating TransportSubscriberLink for topic [/rosout] connected to [callerid=[/rosout] address=[TCPROS connection to [ on socket 11]]]
[ros.camera_info_manager] [2011-03-03 16:25:48,542] [thread 0xb6b41920]: [INFO] camera calibration URL: file:///opt/ros/cturtle/stacks/camera_umd/uvc_camera/example-right.yaml
[ros.camera_info_manager] [2011-03-03 16:25:48,543] [thread 0xb6b41920]: [WARN] [camera] does not match name right_camera in file /opt/ros/cturtle/stacks/camera_umd/uvc_camera/example-right.yaml
[roscpp_internal] [2011-03-03 16:25:48,549] [thread 0xb6b41920]: [DEBUG] XML-RPC call [getParam] returned an error (-1): [Parameter [/uvc_camera/skip_frames] is not set]
[roscpp_internal] [2011-03-03 16:25:48,558] [thread 0xb6b41920]: [DEBUG] XML-RPC call [getParam] returned an error (-1): [Parameter [/uvc_camera/frame_id] is not set]

When i try to set last two parameters given in the log, it is not working. It is not showing error with next generated log.

Any help on this?


edit retag flag offensive close merge delete


I don't see anything in that log that would indicate why the node is dying. Does /dev/video0 exist? Sometimes the kernel module needs to be reloaded. Can you use the camera if you run "guvcview"?
Ken gravatar image Ken  ( 2011-03-03 04:20:37 -0500 )edit

3 Answers

Sort by ยป oldest newest most voted

answered 2011-03-03 00:32:19 -0500

joq gravatar image

Those last two messages just indicate that the parameter server had no values defined for the ~skip_frames and ~frame_id parameters. That is normal and should not be a problem. The driver will probably provide appropriate defaults.

Does the driver work if you do not provide those parameters?

If it fails, what are the symptoms?

edit flag offensive delete link more

answered 2011-03-13 23:40:25 -0500

Prasad gravatar image

Lately i observed this issue is always with all other camera packages also. The problem is, when i set <param ....=""/> in launch file for any node then it is not working. When i run individually it works.

For e.g. When i set usb_cam node in launch file with some custom parameter then process dies and if i don't use launch file and try to roslaunch usb_cam from command line it works.

Is there anything which needs more attention?


edit flag offensive delete link more

answered 2011-03-03 00:58:41 -0500

Prasad gravatar image

No it does not work even if i remove it or provide it. If i provide parameters still process dies but it is not showing any entry in the log about any error. It suddenly stopped working otherwise it used to work very nicely.

edit flag offensive delete link more

Question Tools


Asked: 2011-03-02 21:12:42 -0500

Seen: 624 times

Last updated: Mar 13 '11