Realsense2 device is found, but cannot run program

[hyeonjang]

OS: ubuntu 20.04
Camera: Realsense2 D435i, L515

Hello,
When I tried to run this program, I encounter this message.

Also, on a console the message indicates
Realsense2 devices found: 1

I cannot figure out where this problem occurs.

Could you help me?
Thanks

[saudet]

@cansik Any ideas?

[cansik]

For the RealSense2FrameGrabber it is necessary to first enable the necessary streams. Here an example (samples/RealSense2DepthMeasuring.java#L44-L59):

// enable the color & depth stream of the realsense camera
rs2.enableColorStream(640, 480, 30);
rs2.enableDepthStream(640, 480, 30);

rs2.start();

I assume procamcalib needs the start method to directly enable at least the color input. In my opinion this should be included into the RealSense2FrameGrabber, if no stream has been activated, instead of the exception. It is possible to activate de default color stream by just passing 0 as parameter for width, height and framerate. Especially on the 515 camera this could be important, because there we have different resolutions and stream formats than on the 400 series.

@saudet Do you think this is a good default behaviour? If so I will create a PR.

[saudet]

That sounds like a good idea, yes. The default imageWidth, imageHeight, and frameRate should be taken from the properties though: https://github.com/bytedeco/javacv/blob/master/src/main/java/org/bytedeco/javacv/FrameGrabber.java#L183

[saudet]

Thanks @cansik for fixing this! @hyeonjang please give it a try by replacing modules/javacv.jar with this file: https://oss.sonatype.org/content/repositories/snapshots/org/bytedeco/javacv/1.5.8-SNAPSHOT/javacv-1.5.8-20220215.010447-6.jar

[hyeonjang]

@saudet @cansik Really thank you for updating! Now it works.