Vivian Liu's profile - activity

Hi everyone, I am having problem about using my Andoer USB 2.0 12 Megapixel HD Camera Web Cam. Once I plugged in the webcam, I tried the following:

sudo apt-get install ros-indigo-usb-cam

rosrun usb_cam usb_cam_node

with a terminal running the master. I got the following error:

[ INFO] [1456506319.466005157]: using default calibration URL
[ INFO] [1456506319.466141992]: camera calibration URL: file:///home/ally/.ros/camera_info/head_camera.yaml
[ INFO] [1456506319.466318445]: Unable to open camera calibration file [/home/ally/.ros/camera_info/head_camera.yaml]
[ WARN] [1456506319.466353581]: Camera calibration file /home/ally/.ros/camera_info/head_camera.yaml not found.
[ INFO] [1456506319.466388999]: Starting 'head_camera' (/dev/video0) at 640x480 via mmap (mjpeg) at 30 FPS
[ WARN] [1456506319.517065779]: unknown control 'white_balance_temperature_auto'

[ WARN] [1456506319.526420721]: unknown control 'focus_auto'

[ERROR] [1456506324.536249248]: select timeout

When I type:

ls -ltr /dev/video*

The output is:

crwxrwxrwx+ 1 root video 81, 0 Feb 26 16:39 /dev/video0

Please help. Thanks!

Well, it turned out that I have a wrong makefile inside the package folder. After removing it and rebuild the package again, the targets can be built. Thanks for the replies!!!

After removing build and devel folder, the catkin_make output is:

make: *** Did not identify target and cannot find makefile. Aborted.
Invoking "make -j1 -l1" failed

cannot find makefile?

Hi everyone, I am having a little problem building a node. After I created and built the package, I sourced the setup.bash file. Then I added "src/camera.cpp" to the package. The CMakeList is:

cmake_minimum_required(VERSION 2.8.3)
project(chapter5_tutorials)

find_package(catkin REQUIRED
    COMPONENTS
      roscpp
      message_generation
      sensor_msgs
      dynamic_reconfigure
      driver_base
      cv_bridge
      image_transport
      camera_info_manager
      tf)

find_package(OpenCV REQUIRED)

generate_dynamic_reconfigure_options(
    cfg/Camera.cfg
    cfg/CameraStereo.cfg
    cfg/Homography.cfg)

catkin_package(
    CATKIN_DEPENDS
      roscpp
      message_runtime
      sensor_msgs
      dynamic_reconfigure
      driver_base
      cv_bridge
      image_transport
      camera_info_manager
      tf)

include_directories(${catkin_INCLUDE_DIRS} ${OpenCV_INCLUDE_DIRS})

add_executable(camera src/camera.cpp)
add_dependencies(camera ${PROJECT_NAME}_gencfg)
target_link_libraries(camera ${catkin_LIBRARIES})

add_executable(camera_timer src/camera_timer.cpp)
target_link_libraries(camera_timer ${catkin_LIBRARIES})

add_executable(camera_polling src/camera_polling.cpp)
target_link_libraries(camera_polling ${catkin_LIBRARIES})

add_executable(camera_stereo src/camera_stereo.cpp)
add_dependencies(camera_stereo ${PROJECT_NAME}_gencfg)
target_link_libraries(camera_stereo ${catkin_LIBRARIES})

add_executable(homography src/homography.cpp)
add_dependencies(homography ${PROJECT_NAME}_gencfg)
target_link_libraries(homography ${catkin_LIBRARIES} ${OpenCV_LIBRARIES})

install(TARGETS camera camera_timer camera_polling camera_stereo homography
  ARCHIVE DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
  LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
  RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
)

foreach(dir bag config launch)
    install(DIRECTORY ${dir}/
        DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION}/${dir})
endforeach(dir)

Then I use catkin_make again to build the package. The catkin_make output is：

Base path: /home/ally/dev/catkin_ws
Source space: /home/ally/dev/catkin_ws/src
Build space: /home/ally/dev/catkin_ws/build
Devel space: /home/ally/dev/catkin_ws/devel
Install space: /home/ally/dev/catkin_ws/install
####
#### Running command: "make cmake_check_build_system" in "/home/ally/dev/catkin_ws/build"
####
####
#### Running command: "make -j1 -l1" in "/home/ally/dev/catkin_ws/build"
####

The catkin_make did not add targets to camera.cpp. I cannot find executable inside the devel/lib/<package> and therefore cannot run the node. Where could go wrong? Please help me out. Thank you:)