train one of these for the audio and graphics each and store just the encodings
https://en.wikipedia.org/wiki/Autoencoder
Autoencoder
An autoencoder is a type of artificial neural network used to learn efficient codings of unlabeled data (unsupervised learning). An autoencoder learns two functions: an encoding function that transforms the input data, and a decoding function that recreates the input data from the encoded representation. The autoencoder learns an efficient repre...
en.wikipedia.org