Why is the MOT tracking evaluation running only on few frames of sequence?

[Abhishek0075]

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• I have searched the BoxMOT issues and found no similar bug report.

Question

I was running the tracking evaluation using my YOLOv8 and DeepOCSort but in the 3/4 running tracking step the tracking is done only on few frames not all the frames in the sequence that is only 2184 out of 2334.

[3/4] Running tracker...
Frames IIT_video_01: 100%|██████████| 2184/2184 [04:05<00:00,  8.91it/s]
INFO     | Tracking: 2184 frames, total: 161359.6ms, avg: 73.88ms/frame

In the txt file having the tracking output is also having only that frames' coordinates and labels. Why is it so ? Is it really only running on those frames?

[mikel-brostrom]

I see two reasons for this:

1. Higher FPS on your video than the default. The default FPS is:

boxmot/boxmot/engine/cli.py

Line 56 in eb7257c

click.option('--fps', type=int, default=30,

If YOUR_FPS>DEFAULT_FPS, boxmot will drop frames till the default fps are met

2. Only 2184 frames are actually present in the folder you are reading from. Double check this.