Send bounding boxes to RabbitAMQP

leo2105 · October 1, 2020, 8:02pm

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) : GTX1080TI
• DeepStream Version: 5.0
• TensorRT Version : 7.0
• NVIDIA GPU Driver Version (valid for GPU only) : 440.33
• Issue Type( questions, new requirements, bugs) : Question

Hi
I am working with python binding in the sample 4 (deepstream_test_4) but it only sends the metadata of the first object that find each 30 frames to cloud. I would like to send all the metadata found in that frame, not only one. I tried changing some code lines in the function generate_event_msg_meta but I dont really know how exactly.

Can you suggest me how to do it? thanks in advance.

zhliunycm2 · October 8, 2020, 9:20pm

Hi leo2105,

To send all object meta for the frame, remove the filter for first object. On this line:

github.com

NVIDIA-AI-IOT/deepstream_python_apps/blob/5cb4cb8be92e079acd07d911d265946580ea81cd/apps/deepstream-test4/deepstream_test_4.py#L282


txt_params.font_params.font_color.set(1.0, 1.0, 1.0, 1.0);

# Text background color
txt_params.set_bg_clr = 1
# set(red, green, blue, alpha); set to Black
txt_params.text_bg_clr.set(0.0, 0.0, 0.0, 1.0);

# Ideally NVDS_EVENT_MSG_META should be attached to buffer by the
# component implementing detection / recognition logic.
# Here it demonstrates how to use / attach that meta data.
if(is_first_object and not (frame_number%30)):
    # Frequency of messages to be send will be based on use case.
    # Here message is being sent for first object every 30 frames.

    # Allocating an NvDsEventMsgMeta instance and getting reference
    # to it. The underlying memory is not manged by Python so that
    # downstream plugins can access it. Otherwise the garbage collector
    # will free it when this probe exits.
    msg_meta=pyds.alloc_nvds_event_msg_meta()
    msg_meta.bbox.top =  obj_meta.rect_params.top
    msg_meta.bbox.left =  obj_meta.rect_params.left

`if(is_first_object and not (frame_number%30)):`

Change it to

`if(not (frame_number%30)):`

leo2105 · October 9, 2020, 11:03pm

Yeah, but It will send one bounding per message, but I want to do I kind of list and send all the bboxes per frame in only one message.
Another question, I want to send input frames inside the message to Rabbit. Because I need to save some frames in cloud. Do you know if deepstream can do it?
thanks in advance.

manojy · November 3, 2020, 1:29am

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

Can you give more details, why you need all the bounding boxes in the form of a list and in a single message? Is there any analytics/processing done on these messages in the cloud?