can't set any settings for uvc_camera

asked 2012-07-07 07:29:34 -0600

dinamex
447 ●46 ●52 ●59

Hi guys,

I want to use a webcam with the uvc_camera Package. I'm using Ubuntu 11.10 server and compiled the package from source (because I use an ARM processor). It compiled without any problems but when I try to run the launchfile (camera_node.launch) I got the following failure message. I can see the video but its really slow and all settings (color, saturation, whitbalance etc.) are wrong and the picture looks almost crossprocessed.

camera_node.launch:

PARAMETERS
 * /uvc_camera/device
 * /rosdistro
 * /uvc_camera/fps
 * /uvc_camera/height
 * /uvc_camera/camera_info_url
 * /uvc_camera/frame
 * /rosversion
 * /uvc_camera/width

NODES
  /
    uvc_camera (uvc_camera/camera_node)

auto-starting new master
process[master]: started with pid [3736]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to c57a2f6c-b5ae-11e1-bd3e-2e607c264e01
process[rosout-1]: started with pid [3751]
started core service [/rosout]
process[uvc_camera-2]: started with pid [3754]
[ INFO] [1339629806.595916290]: using default calibration URL
[ INFO] [1339629806.597411651]: camera calibration URL: file:///home/panda/.ros/camera_info/camera.yaml
[ERROR] [1339629806.598754424]: Unable to open camera calibration file [/home/panda/.ros/camera_info/camera.yaml]
[ WARN] [1339629806.599486846]: Camera calibration file /home/panda/.ros/camera_info/camera.yaml not found.
[ INFO] [1339629806.612029571]: camera calibration URL: file:///home/panda/ros_workspace/camera_umd/uvc_camera/example.yaml
[ERROR] [1339629806.612853545]: Unable to open camera calibration file [/home/panda/ros_workspace/camera_umd/uvc_camera/example.yaml]
[ WARN] [1339629806.613372344]: Camera calibration file /home/panda/ros_workspace/camera_umd/uvc_camera/example.yaml not found.
opening /dev/video2
pixfmt 0 = 'YUYV' desc = 'YUV 4:2:2 (YUYV)'
  discrete: 640x480:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 160x90:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 160x120:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 176x144:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 320x180:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 320x240:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 352x288:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 432x240:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 640x360:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 800x448:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 800x600:   1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 864x480:   1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 960x720:   1/15 1/10 2/15 1/5
  discrete: 1024x576:   1/15 1/10 2/15 1/5
  discrete: 1280x720:   1/10 2/15 1/5
  discrete: 1600x896:   2/15 1/5
  discrete: 1920x1080:   1/5
  discrete: 2304x1296:   1/2
  discrete: 2304x1536:   1/2
pixfmt 1 = '    ' desc = '34363248-0000-0010-8000-00aa003'
  discrete: 640x480:   1/30 1/24 1/20 1/15 1/10 2/15 1/5
  discrete: 160x90:   1/30 1/24 1/20 1/15 ...

(more)

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I've been having a similar issue. I have gone in and changed the control ranges in the area specified but it hasn't had an effect. According to the camera specs, I should not be setting the White Balance Temperature (Auto is there and set). The line is commented out but it's shown in the output.

DocSmiley ( 2012-08-17 09:01:39 -0600 )edit

I also looked at the line suggested by @piyushk. The set_control() function calls a different id than the one printed: 9963776 would be brightness, while printed says brightness is 980900. However, my output suggests that the value set in the code is used, not the one printed. Very confusing.

RafBerkvens ( 2013-04-12 03:21:44 -0600 )edit

https://github.com/ericperko/uvc_cam/... (a fork) has some commented out lines like

set_control(V4L2_CID_BRIGHTNESS, 135);

Also from the command line: uvcdynctrl -d /dev/video0 -s 'Brightness' 135

lucasw ( 2014-08-20 10:44:17 -0600 )edit

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can't set any settings for uvc_camera

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