good performance on thumos, but not on activitynet

[coolbay]

Hi, @sunnyxiaohu !

R-C3D achieves a very good performance on the Thumos14 dataset. I can reach 0.4175 @ IoU 0.5 using your implementation. However, it does not perform as well on the ActivityNet dataset. Similar to the results you demonstrate, I cannot reach a high mAP either. Could you provide some insight on why this happens? What differences in these two datasets cause this performance gap?

Thank you very much!
Chen