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Hi Ruban,

Could you clarify what you mean by previewing a camera in triangle/trapezoidal shape? Do you have any examples you could provide?

If you would like to make changes to the configuration file such as the number of camera inputs and the placement of each camera stream on your display when running ./apps_python/app_edgeai.py configs/imx219_cam_example.yaml, see: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-am69a/10_00_00/exports/edgeai-docs/common/configuration_file.html

The configuration file allows you to define the mosaic coordinates as well as width and height, but there is no field for rotation. The out of box applications such as the one you are using, take the information from the config file to generate a GStreamer pipeline. When you quit the application, you can see this pipeline in the terminal. You can copy the pipeline and add a rotation element to achieve your desired output.

Here is an example pipeline that uses this rotation element. The angle by which the picture is rotated is in radians.

gst-launch-1.0 -v videotestsrc ! rotate angle=0.78 ! videoconvert ! autovideosink

For more GStreamer pipeline examples, see:

FAQ: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1427869/faq-sk-am69-how-to-stream-from-csi-sensor-to-display-using-gstreamer

Edge AI dataflows: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-am69a/10_00_00/exports/edgeai-docs/common/edgeai_dataflows.html

Thank you,

Fabiana

Thanks for the reply. Provide data is useful. I would like to get more information on the below.

In python  connected 4 camera and this is the preview. the output is in 4 triangles shape and stitched. The python code using opencv and this is using usb . i wanted using CSI for this SK-AM69 board with imx219 camera.

The code for tringle shape is 

# Define masks for isosceles triangular areas
left_mask = np.zeros((canvas_height, canvas_width // 2), dtype=np.uint8)
pts_left = np.array([[0, canvas_height], [0, 0], [canvas_width // 2, canvas_height // 2]], dtype=np.int32)
cv2.fillPoly(left_mask, [pts_left], 255)

right_mask = np.zeros((canvas_height, canvas_width // 2), dtype=np.uint8)
pts_right = np.array([[canvas_width // 2, 0], [canvas_width // 2, canvas_height], [0, canvas_height // 2]],
                     dtype=np.int32)
cv2.fillPoly(right_mask, [pts_right], 255)

the code for masking is 

# ruban for top mask
output_frame[0:400, 0:400] = masked_frame_top[:, :400] +  masked_frame_left[:400, :] # ruban top left corner

output_frame[0:400, 400:800] = masked_frame_top[:, 400:800] + masked_frame_right[:400, :] # ruban top right  corner

# ruban for bottom mask
output_frame[400:800, 0:400] = masked_frame_bottom[:, :400] +  masked_frame_left[400:800, :] # ruban bottom left corner

output_frame[400:800, 400:800] = masked_frame_bottom[:, 400:800] + masked_frame_right[400:800, :] # ruban bottom right corner
 
this I wanted in out of box config box to run in ./apps_python/app_edgeai.py configs/imx219_cam_example.yaml now the output of mosaic provides only position and rectangle.I want to reshape kindly provide solution as above image ASAP.

Thanks in Advance.

Hi Ruban,

I recommend taking a look at apps_python directory to understand how the python based application works and make the changes needed to meet your use case.

Thank you,

Fabiana

I have looked on apps_python. The issue i am facing is that. Input is taken from config file. then it is passed to main python then to post process. but the problem is the mosaic coordinates it has only 4 parameter in which v,w is the coordinates point and x,y is the diemension . no matter what i hve done it takes is rectangle shape. Kindly provide one example to change the dimension to triangle shape remaining I can take care

Thanks in advance

Thanks for the support

Rotate:
gst-launch-1.0 -v videotestsrc ! rotate angle=0.78 ! videoconvert ! autovideosink - working

Video Crop:
gst-launch-1.0 -v videotestsrc ! videocrop top=42 left=1 right=4 bottom=0 ! ximagesink - WARNING: erroneous pipeline: no element "ximagesink"

Rotate + Video Crop:
gst-launch-1.0 -v videotestsrc ! rotate angle=0.78 ! videoconvert ! videocrop top=42 left=1 right=4 bottom=0 ! autovideosink - differet place its working

Only color lines is visible. Required camera imx219 preview to be made how to configure for 

Hi Ruban,

The first two pipelines I shared were example pipelines taken directly from the GStreamer website to give you an idea on how the rotate and video crop elements can be used in the pipeline that you develop. I used the two elements in a single pipeline to demonstrate how they can be used at once. I also shared this FAQ in my initial response which provides basic GStreamer pipelines that use a camera input and output the stream to a display. You can use these resources as a starting point when developing the pipeline needed to meet your use case.

Thank you,

Fabiana