from quick search, it doesn't seem many tried to achieve the same as you. From openvinos docs, there's a bullet point
pwcnet - converts output of PWCNet network to OpticalFlowPrediction., so this might be possible by the openvino. I would suggest checking our documentation about model conversion, especially the
Troubleshooting part, which you might need if you want to make these models available for depthai devices (eg. OAK-D).