NAN appears when training

[JesseZZZZZ]

Hi @lahavlipson , have you tried training DPVO on other datasets beside TartanAir? I tried to train it on TUM (using _build_dataset from raw RGB and depth maps), but all values became NAN, do you know the issue? (t1[0] and t2[0] are all NANs). Thank you so much!