Shooting and saving videos with RealSense d435 using MATLAB

• MartyX Grover

  • June 08, 2021 07:58

  Hello, if you need a live depth image like the one in the 2D mode of the RealSense Viewer (not a 3D point cloud) then the RealSense MATLAB wrapper script in the link below may be helpful.

  https://github.com/IntelRealSense/librealsense/issues/9056#issuecomment-855930210

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• 180445034

  • June 09, 2021 07:02

  Hello MartyG
  I was able to get a way to save the depth image from the URL you mentioned.
  But instead of saving depth images, I would like to know how to use matlab to record and save depth and color camera footage.

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• MartyX Grover

  • June 09, 2021 07:51

  There are a limited number of references available about using RealSense with MATLAB for live capture.  The RealSense MATLAB wrapper provides an example program called capture_example.m for capturing and rendering multiple streams.  Since the MATLAB wrapper's programming language is almost 1:1 with the SDK's C++ API, it may be possible to add capture to file to that project.

  https://github.com/IntelRealSense/librealsense/blob/master/wrappers/matlab/capture_example.m

  A RealSense user also shared their script for generating an RGB point cloud (again, not saving the streams).

  https://community.intel.com/t5/Items-with-no-label/MATLAB-RGB-point-cloud/td-p/584717

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• 180445034

  • June 11, 2021 06:05
  • Edited

  Hello MartyG
  When I run "capture_example.m" I get the following error

  The output argument "profile" (and probably other arguments as well) was not assigned during the call to "realsense / pipeline / get_active_profile".

  Error: realsense.capture_example / StartUpFunc (line 180)
  SProf = app.RsPipeLine.get_active_profile ();

  Has occurred. How can I get rid of this error?

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• MartyX Grover

  • June 11, 2021 07:45

  It is referring to this line of the script:

  https://github.com/IntelRealSense/librealsense/blob/master/wrappers/matlab/capture_example.m#L180

  The command get_active_profile() checks the available stream profiles that are available for depth, color, etc.  

  https://intelrealsense.github.io/librealsense/doxygen/classrs2_1_1pipeline.html#a5b51c8a6bde3067f5efbfa63c125332f

  If the profiles cannot be retrieved then that would suggest to me some kind of failure in the pipeline start, such as a disconnection of the camera.   Are you able to run other MATLAB examples successfully?

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• 180445034

  • June 14, 2021 05:39

  Examples such as "depth_example" and "depth_view_example" can be executed.
  Also, since I only use one camera, I don't need multiple rentals. Is there any other way to shoot videos with realsense through matlab?

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• MartyG

  • June 14, 2021 06:16
  • Edited

  There is the Image Acquisition Toolbox for MATLAB.  My understanding is that it does not have official support for RealSense cameras specifically but can access the camera through generic settings.  A member of MATLAB's support forum also suggested that a custom adaptor could be created for a RealSense camera.

   

  Image Acquisition Toolbox

  https://www.mathworks.com/products/image-acquisition.html

   

  Using generic settings

  The following advice was provided in a past RealSense case:

  On Matlab, go to Home tab -> Add-Ons-> Get Hardware Support Packages -> MATLAB Support Package for USB Webcams and Image Acquisition Toolbox Support Package for OS Generic Video Interface.

   

  Creating a custom adaptor

  https://www.mathworks.com/matlabcentral/answers/451195-is-intel-s-realsense-camera-supported-by-the-image-acquisition-toolbox

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• 180445034

  • June 15, 2021 04:38

  I will try. Thank you.

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