Could not get track_id

[sunnysab]

Hello, I've downloaded yolov8n-face.pt provided at your link, while I found that result.boxes.id is always None. It leads tracking unavailable.

I tested other face detecting model, all are the same. It's really confusing me.

The code is here:

import cv2
from ultralytics import YOLO


_DETECTOR_MODEL = YOLO('yolov8n-face.pt')

if __name__ == '__main__':
    video = '/home/sunnysab/测试视频4_大门_买饭回.mp4'
    stream = cv2.VideoCapture(video)

    while True:
        ret, frame = stream.read()
        if not ret:
            break

        results = _DETECTOR_MODEL.track(frame, conf=0.3, persist=True)
        result = results[0]

        if result.boxes.id:
            print('id = ', result.boxes.id.int().cuda().tolist())
            print(result.boxes.xywh)
            print(result.boxes.id)

        annotated_frame = result.plot()
        cv2.imshow('frame', annotated_frame)

        if cv2.waitKey(1) & 0xFF == ord('q'):
            exit(0)

Looking forward to receiving your reply.