Error for realsense_camera realsense_r200_nodelet_standalone_preset.launch

[sclin-loauas]

System Configuration

Version	Known Good	Your Configuration
Operating System	ubuntu 14.04	ubuntu 14.04
Kernel Version	4.4.0-13	4.4.0-040400-generic
R200 FW	1.0.72.06	1.0.72.06
librealsense	0.9.1	0.9.0

I can run cpp-capture and build the package using catkin-make. However when I run
"roslaunch realsense_camera realsense_r200_nodelet_standalone_preset.launch" , an error occurs.

[ INFO] [1460466020.703162344]: Initializing nodelet with 4 worker threads.
[ INFO] [1460466020.790980800]: RealSense Camera - Starting camera nodelet.
**[ERROR] [1460466021.095609328]: RealSense Camera - Error calling rs_create_context ( api_version:4 ):
uvc_open2(...) returned Access denied

[FATAL] [1460466021.232074645]: Service call failed!
[standalone_nodelet-2] process has died [pid 7430, exit code 1, cmd /opt/ros/indigo/lib/nodelet/nodelet manager __name:=standalone_nodelet _log:=/home/aicrobo/.ros/log/82e77eb2-00ae-11e6-a8a2-c01885c34cc3/standalone_nodelet-2.log].
log file: /home/aicrobo/.ros/log/82e77eb2-00ae-11e6-a8a2-c01885c34cc3/standalone_nodelet-2.log
[RealsenseNodelet-3] process has died [pid 7437, exit code 255, cmd /opt/ros/indigo/lib/nodelet/nodelet load realsense_camera/RealsenseNodelet standalone_nodelet mode preset enable_depth true enable_color true enable_pointcloud true enable_tf true __name:=RealsenseNodelet _log:=/home/aicrobo/.ros/log/82e77eb2-00ae-11e6-a8a2-c01885c34cc3/RealsenseNodelet-3.log].
log file: /home/aicrobo/.ros/log/82e77eb2-00ae-11e6-a8a2-c01885c34cc3/RealsenseNodelet-3.log
**

Do I need to run the command as a super user? I tried to add "sudo" before the command but it can not find the command "roslaunch"
What can I do?

[reaganlo]

We could not reproduce this error.
Can you please ensure that you are using the Video4Linux backend? Follow the instructions at https://github.com/IntelRealSense/librealsense/blob/master/doc/installation.md#video4linux-backend

You could also try installing the librealsense version 0.9.1

[mdhorn]

Try adding your login account to the group video.

sudo adduser $USER video

You may need to log out and log back into the system to see the new group.

groups

In general, the video devices will be owned by root and set to group video:

$ ls -l /dev/video*
crw-rw----+ 1 root video 81, 3 Apr 12 18:02 /dev/video3
crw-rw----+ 1 root video 81, 4 Apr 12 18:02 /dev/video4
crw-rw----+ 1 root video 81, 5 Apr 12 18:02 /dev/video5

[mdhorn]

@sclin-loauas Were you able to solve this permissions problem?

[mdhorn]

Closing due to no response from submitter.