Docker container

Hi,

I want to make use of NGC container to run inference. However, within container, opencv not able to read frames from MKV videofile. I tried with both below containers, and results are same.
nvcr.io/partners/gridai/pytorch-lightning:v1.3.7
nvcr.io/nvidia/pytorch:21.09-py3

Can someone please share me which container do I have to use in AWS cloud?