Not OP, but I deal with a variety of proprietary binary/encoded files in the 10s of MB to the 10s of GB range at work, and we have started decoding to JSON as the first step in our normalization, indexing and analytics pipeline (To be honest we essentially just throw everything in to MongoDB). Daily we're in the terabyte range.
It's the perfect solution because you can use the same decoder + something like jq for debugging and manipulation on the command line.