BFS-U3-19S4M-C stream live video

Grégory BAERT

• July 08, 2024 07:14

Hello,

I'd like to know if it's possible with Spinnaker SDK 4.0.0.116 to display a live video stream, like with SpinView? I have analysed the code of the "SpinSimpleGUI_MFC" project, but this project calls GUIs from different libraries.

I would like to do the same thing in my own application developed in C++.

Is this possible?

Thank you,

Best regards,

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• 

  TDY_Ifeanyi

  Community team

  • July 10, 2024 08:13

  

  

  Hi Grégory,

  I am not sure if I understood what you intend to accomplish correctly. Have you tried using SpinSimpleGUI_MFC or following similar implementation in your project and it is not working fine?

  A library is required to render images, and our SpinSimpleGUI_MFC example project is one way to implement this in C++ language. If you do not require the GUI elements, another alternative is to use OpenCV library as shown in our github example: https://github.com/Teledyne-MV/Spinnaker-Examples/tree/main/AcquisitionOpenCV

  I am looking forward to your response.

  Best regards,

  Ifeanyi

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  Grégory BAERT

  • July 10, 2024 13:29

  Hello Ifeanyi,

  Thank you.

  I first tried using the SpinSimpleGUI_MFC project, and after re installation of Spinnaker 4 with direct show third party, this project works fine. The project "SpinSimpleGUI_DirectShow" works fine too.

  I'm currently developing a software for a client in C++ using the Qt 6 + QML framework. (not in MFC)

  I would like to stream image on a viewer after connexion like SpinView software

  I read yesterday that Qt 6 no longer uses DirectShow but Windows Media Foundation.

  For live streaming, could I get the data in "unsigned char*" and then display it in a viewer ?

  Best regards,

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  Grégory BAERT

  • July 12, 2024 11:46

  Hello,

  I've found a way to retrieve an image as an unsigned char*, using the "GetData" method.

  https://softwareservices.flir.com/Spinnaker/latest/class_spinnaker_1_1_image.html#a45b28c54e2ee57571e4d79ea0d20e41e

  However, according to the link above, you shouldn't use the "Release" method?

  Do you have a basic example of how to use this method, please ?

  Thank you,

  Best regards,

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• 

  TDY_Ifeanyi

  Community team

  • July 12, 2024 13:32

  

  

  Hello Grégory,

  Sorry for delay in getting back to you, and glad to know you were able to find solution for it. Yes, it means image.Release() should not be called prior to using the image data. 

  Alternatively, I would deepcopy current mage to another object before calling release method.

  We do not have example project for using this method, but spinnaker C++ API documentation (default location: C:\Program Files\Teledyne\Spinnaker\doc\C++) contains code snippet on how to retrieve image data from spinnaker ImagePtr object. 

  I will paste the code snippet here for ease of reference:

  // Assuming image is 640 x 480 resolution. The current pixel format as well as PixelColorFilter indicate the Bayer Tile Mapping for the camera. For example, BayerRG8 is RGGB. ImagePtr pResultImage = cam.GetNextImage(); char* data = (char*)pResultImage->GetData(); // Assuming image is 640 x 480 // data[0] = Row 0, Column 0 = red pixel (R) // data[1] = Row 0, Column 1 = green pixel (G) // data[640] = Row 1, Column 0 = green pixel (G) // data[641] = Row 1, Column 1 = blue pixel (B)

  I hope this helps to answer your question.

  Best regards,

  Ifeanyi

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  Grégory BAERT

  • July 12, 2024 14:20

  Hello,

  Thank you,

  I don't know if it is important but, I set the camera's handle mode to "NewestOnly".

  My test program crashes when I try to make a deep copy. This is a part of my log file:

  [ERR ] - 16:18:52.517 - Spinnaker: NULL pointer dereferenced. [-1015]
  [ERR ] - 16:18:53.176 - [-1015] raised in function Spinnaker::BasePtr<class Spinnaker::IImage,class Spinnaker::IImage>::operator -> at line 155

  Best regards,

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  Grégory BAERT

  • July 15, 2024 07:22

  Hello,

  Sorry, I wanted to test as quickly as possible last Friday. I forgot to instantiate my variable before : Spinnaker::Image::Create()

  I'm now going to check the data returned by the 'GetData()' method and convert the variable (unsigned char*) to QImage in Qt.

  Thank you,

  Best regards,

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  Grégory BAERT

  • July 15, 2024 12:03

  Hello,

  I recover the array (unsigned char*) and converted it to 'data:image/"png";base64,', to display it in the GUI part in QML (Image - Qt 6)

  Best regards,

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  TDY_Ifeanyi

  Community team

  • July 15, 2024 13:41

  

  

  Hello Grégory,

  Nice to know you have made a significant progress on this implementation. I presume this issue is resolved, or is there still question you would like to discuss further?

  Best regards,

  Ifeanyi

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  Grégory BAERT

  • July 15, 2024 14:09

  Hello,

  Thank you for your reply. Yes, this discussion is over.

  Best regards,

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