Fwiw, here are the links for our ETL tool DataVec (it vectorizes data, or tensorizes it if you prefer): https://github.com/deeplearning4j/datavec

https://deeplearning4j.org/datavec

The thing to remember is that this is ETL focused on machine learning. It's not any old set of transforms. It's transforms that help us normalize, standardize and finally tensorize various data types, be they images, video, text or time series.