Darknet exemplo program starts and freezes

matheuscaltran · August 6, 2022, 11:10pm

hardware:
Jetson nano
webcam logitech c525

My Configuration:
Jetpack 4.5
cuDNN 8.0
CUDA 10.2
OPENCV 4.1.1

MAKEFILE darknet:
GPU =1
CUDNN =1
CUDNN_HALF =1
OPENCV = 1
LIBSO = 1

changed the cfg and weights of darknet_video.py to yolov4 tiny, when running this script starts the camera and instantly freezes. If I close the WEBCAM tab several times the program comes back

follow the video showing this (I don’t know why the footage turned pink)

the lines that I changed in the code:

line 18: parser.add_argument(“–weights”, default=“yolov4-tiny.weights”,

line 24: parser.add_argument(“–config_file”, default=“./cfg/yolov4-tiny.cfg”,

line 178: cap = cv2.VideoCapture(“/dev/video0”)

code edited:
darknet_video.py (6.6 KB)

even if i run the program without editing the same problem occurs.

AastaLLL · August 8, 2022, 3:42am

Hi,

Could you try to read the camera with the below sample to see if it works?

github.com

NVIDIA-AI-IOT/jetcam/blob/master/jetcam/usb_camera.py

from .camera import Camera
import atexit
import cv2
import numpy as np
import threading
import traitlets


class USBCamera(Camera):
    
    capture_fps = traitlets.Integer(default_value=30)
    capture_width = traitlets.Integer(default_value=640)
    capture_height = traitlets.Integer(default_value=480)   
    capture_device = traitlets.Integer(default_value=0)
    
    def __init__(self, *args, **kwargs):
        super(USBCamera, self).__init__(*args, **kwargs)
        try:
            self.cap = cv2.VideoCapture(self._gst_str(), cv2.CAP_GSTREAMER)

This file has been truncated. show original

Thanks.

matheuscaltran · August 28, 2022, 1:15am

hello, I installed version 4.6 on SD to see if it worked, but it keeps freezing when starting darknet_video.py

so now I’m using version 4.6

To test the example I did:
$ git clone GitHub - NVIDIA-AI-IOT/jetcam: Easy to use Python camera interface for NVIDIA Jetson
$ cd jetcam
$ sudo python3 setup.py install

output:

after:
$ cd jetcam/jetcam
$ sudo python3 usb_camera.py
output:

didn’t work, so this example is written and testing with SD JetCard

“JetCam is tested on a system configured with the JetCard configuration. Different system configurations may require additional steps.”

I know the camera is working, the only problem is that it crashes when running the darknet example

I used this example on my PC and it worked normal, I think it must be some jetpack library that is causing it to freeze

AastaLLL · September 8, 2022, 4:48am

Hi,

It looks like relates to the camera you used.
Could you share the output of the following command?

$ v4l2-ctl --list-formats-ext --all

Thanks.

matheuscaltran · September 10, 2022, 9:02pm

matheuscaltran · September 21, 2022, 6:59pm

I changed some program variables and it worked

thanks for the try

AastaLLL · September 22, 2022, 4:08am

Good to know this.
Thanks for the feedback.

system · October 12, 2022, 6:06am

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