Tried to run Pycharm + Pytorch + YoloV3 continuously over an mp4 file and the Nano was shut down after several minutes. The recorded temperatures by running
tegrastats --interval 10000 > thermal_nofan.txt
before shutdown were
PLL@44C CPU@49C PMIC@100C GPU@46C AO@51C firstname.lastname@example.orgC (The constant PMIC@100 should be ignored)
Then, pointed a home fan on the Nano, the file was decoded without any problem and the recorded temperatures were about:
PLL@28.5C CPU@33.5C PMIC@100C GPU@28C AO@35C email@example.comC (depending on time interval)
Seems that a fan for the Nano is a must, ordered the Noctua NF-A4x20 5V PWM which is the recommended fan for the Nano.