No JPEG data found in image
I am currently running ROS on VirtualBox. After running $roslaunch usb_cam usb_cam.launch Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file...
View Articleuvc_camera gets a terrible image and usb_camera doesn't set framerate
I have a Logitech c920 webcam that I want to use with ROS. I originally installed uvc_camera, but it gets a terrible quality image from the camera. Then I tried usb_cam, which gets a fantastic quality...
View ArticleMultiple usb webcams with their own calibration file
I launched two webcams with the usb_cam package (ROS Indigo). My launchfile is very simple: And the correct output is [ INFO] [1508058286.935975255]: using default calibration URL [ INFO]...
View Articleusb_cam outbuf size mismatch; possibly different format?
I'm using usb_cam with a camera that supports mjpeg, but I'm getting errors. The camera supports these formats: $ v4l2-ctl --device=0 --list-formats-ext ioctl: VIDIOC_ENUM_FMT Index : 0 Type : Video...
View Articlehow to increase the resolution of logitech c920 to detect aruco markers more...
I am using logitech c920(about 12ft above ground) to detect an aruco marker using the aruco_ros library. The resolution is set to 640x480 but at this resolution the aruco marker is not being detected...
View Article[head_camera] does not match name /camera/image_raw
I have the following launch file to use visp_auto_track with 2 cam's However, when I run this, I get the warnings: [ INFO] [1515587518.127209475]: camera calibration URL:...
View ArticleApriltag topics do not return any information but execute without errors or...
I can launch the apriltag_detector node without errors or warnings but the topics do not return any information. The command 'rostopics list' will show all the correct topics but they do not return any...
View ArticleChange node name
Hi, i have this code from visp_auto_tracker, i want to change the name of the node What i want is to change this line: Into this: But the launch file won't work after that change..
View ArticleCamera Stream Muliplexer
HI Everyone, The robot platform I am working on has 6 cameras onboard with different views. The Coms system only has the bandwidth for one of these views, what is the best (quickest/easiest) way to...
View ArticleLaunch two camera nodes for stereo calibration
Hello, I am attempting to launch two camera nodes via a launch file in order to calibrate them via stereo. Below is my launch file: I am pretty new to ROS and need some help getting this to output two...
View Article[ERROR] [1519888351.478412390]: Cannot identify '/dev/video0': 2, No such...
hi, I'm trying to use `usb_cam-test.launch` in `usb_cam` package to read my web camera, but it keeps returning error: Cannot identify '/dev/video0': 2, No such file or directory ---------- **Update:**...
View Articlerun visp_auto_tracker without display
Hi, I am running my visp_auto_tracker with usb_cam remotely via ssh, without a screen attached to the robot. Visp_auto_tracker is encountering a display error as there is no screen to display the...
View Articlehow to run ros usb_cam package and webrtc on the same video device?
Hi, As title, I would like to run ros usb_cam driver and webrtc on the same video device (say /dev/video0) together. If I run usb_cam driver first, then webrtc seems to to be failed to open the video...
View ArticleProblem with usb_cam in melodic using laptop integrated camera
I installed ros, usb_cam successfully however when I run the command:> rosrun usb-cam usb-cam-node I get the following error: [ INFO] [1532657507.128646432]: using default calibration URL [ INFO]...
View ArticleWhy can't I install usb-cam package at RPI3?
Hello, I have installed Raspbian Stretch at my RPi3 and the ros_comm for the ROS Kinetic package (since it was the recommended one from the ros wiki). However, when I try to install any package the...
View Articlefocus setting in usb_cam
When I try to use `usb_cam` to control uvc camera, setting the "focus" parameter in the launch file, it seems to have no effect on my image result. But it does have effects when I change the...
View ArticleUSB_CAM error : Input/output error
Hi, I want to use web-camera(Logicool Webcam C210) I use usb-cam package,but I cannnot see the web-camera view. My launch file is below, So,I got the error messages [ERROR] [1536468451.681312829]:...
View ArticleUSB_CAM error with low resolution on RaspiCam
Hi Guys, When trying to run the USB_CAM with a **raspberry pi cam** connected with a **flex cable** I am getting the following error: ***[ERROR] [1536479863.709252536]: VIDIOC_S_FMT error 22, Invalid...
View ArticleInput/output error using usb_cam package
Hi, I am trying to use ```usb_cam``` package to connect a *Logitech* usb camera from my laptop. I am using ROS ```kinetic``` with ```Ubuntu 16.04```. I successfully built the package using...
View Article[image_transport] Topics '/usb_cam/image_color' and '/usb_cam/camera_info' do...
please help me :( $ rosrun image_transport republish compressed in:=usb_cam/image raw out:=usb_cam/image $ ROS_NAMESPACE=usb_cam rosrun image_proc image_proc image_raw:=image _approximate_s=true...
View ArticleNot detecting raspberry pi camera
I am doing a project in which I have to use a usb camera and the raspberry pi camera. Therefore, I installed first the usb_cam package and tried to make a web streaming with the rasbperry pi camera....
View ArticleProblems when relaunching camera
First time after starting PC I can launch camera by:> roslaunch usb_cam usb_cam-test.launch However after closing it, using ctrl+c in the terminal and running again I get following error: >...
View Articleopencv video_stream crash for webcam
Hi, Im using ROS kinetic with ubuntu 16 I tried to run the following: sudo apt-get install ros-kinetic-video-stream-opencv source devel/setup.bash roslaunch video_stream_opencv webcam.launch it opens...
View ArticleInput/output error using usb_cam
I am trying to use usb_cam package to connect a Logitech usb camera from my laptop. I am using ROS kinetic with Ubuntu 16.04. I successfully built the package using catkin_make. Then when I run the...
View Articlerecording only header image_raw message
I would like to record using rosbag only the /usb_cam/image_raw/header topic excluding the data. Tried: rosbag record -a -x "/usb_cam1/image_raw/data" But looks like it is not working. I have more...
View ArticleVIDIOC_S_FMT error 5 , Input/output error
Hello, When i run the node usb_cam in ros kinetic under ubuntu 16.04 I have this error: [ERROR] [1555322281.131759362]: VIDIOC_S_FMT error 5, Input/output error [usb_cam-2] process has died [pid 18567,...
View ArticleHow to use image_proc/crop_decimate to crop an image?
Hi, I used usb_cam driver to publish a camera raw image, and I'm trying to crop the published image using image_proc/crop_decimate. when I viewed the output of image_proc/crop_decimate, I did not see...
View ArticleRunning usb_cam across VNC and getting Cannot identify '/dev/video0'
Hello guys, I was running a docker container that contains the normal ros packages and usb_cam. I visualized the ubuntu interface through a VNC (localhost:5900) and tried `roslaunch usb_cam...
View Articleusb_cam pkg gives garbled green screen
I have a ROS kinetic on my virtualbox. I tried to use "usb_cam" pkg but it doesn't work. My web cam is connected directly to my PC and I can see the video through "cheese" or "camorama" but when I run...
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