How to start gscam in groovy/hydro ?

asked 2014-04-16 03:25:41 -0500

hvn
72 ●34 ●41 ●48

Hi,

There seems to be conflicting info about how to start and use gscam. http://wiki.ros.org/gscam states to go to the bin/ directory but http://answers.ros.org/question/91676... mentions something entirely different. Also, when trying, I find that ~/.ros/camera_info doesn't exist. Shouldn't this be installed with gscam ?

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Hi, it doesn't matter if you don't have your bin or the camera_info folder. Did you tried something and get errors?

RosFaceNoob ( 2014-04-16 05:50:00 -0500 )edit

Yes, I did. I exported GSCAM_CONFIG, started "rosrun gscam gscam". Got the messages that it can't open the camera calibration file and that camera.yaml isn't found. It does start the stream but "rostopic list" doesn't show any /gscam topics.

hvn ( 2014-04-16 06:53:24 -0500 )edit

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answered 2014-04-16 21:41:22 -0500

RosFaceNoob
42 ●5 ●7 ●11

updated 2014-04-16 21:41:55 -0500

You have that warning because you didn't calibrate your camera. It's not an error, it's just a warning so you can still run your gscam. You won't have any /gscam topics, but something like /camera/camerainfo /camera/image_raw. Do you have something like that?

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I did have those topics, now it's failing for some reason so have to figure out why. Ok, had wrong framerate. So have those topics again.

hvn ( 2014-04-16 22:50:41 -0500 )edit

So your gscam is running. Do you have other problems?

RosFaceNoob ( 2014-04-16 23:02:01 -0500 )edit

OK, what's wrong with "rosrun image_view image_view image:=/camera/image_raw" that I get "Illegal instruction (core dumped)" ?

hvn ( 2014-04-16 23:11:42 -0500 )edit

what did you put in your GSCAM_CONFIG? make sure your device is the good one

RosFaceNoob ( 2014-04-16 23:29:33 -0500 )edit

If you mean like device=/dev/video0, yes it is. The whole GSCAM_CONFIG="v4l2src device=/dev/video0 ! video/x-raw-rgb,framerate=25/1 ! ffmpegcolorspace"

hvn ( 2014-04-16 23:57:00 -0500 )edit

try GSCAM_CONFIG="v4l2src device=/dev/video0 ! video/x-raw-rgb ! ffmpegcolorspace"

RosFaceNoob ( 2014-04-17 02:13:54 -0500 )edit

same result

hvn ( 2014-04-17 02:53:13 -0500 )edit

OK, found out why it gives Illegal instruction. It seems that the AMD cpu can't handle (part of) rosrun.

hvn ( 2014-04-19 21:19:12 -0500 )edit

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How to start gscam in groovy/hydro ?

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