GPU memory usage 9G

[zhujiagang]

Hi, thanks for your repo!
When I run python run.py (input is a video) on a 4 GPU machine, the code will take up 9872Mb per GPU. However, when I try to downsize the input by adjusting width=608, height=608 (to 160 for example) in darkflow/cfg/yolo.cfg, the memory usage doesn't change at all. I also try to comment the tracking code, the memory usage doesn't change. I think the memory usage is too large for detection.