I don't care enough to do deep experiments, but it seems if I upload files Hive doesn't have "magic" for, they don't get changed. Also, another mp3 didn't get c

I don't care enough to do deep experiments, but it seems if I upload files Hive doesn't have "magic" for, they don't get changed. Also, another mp3 didn't get changed, so maybe they do some kind of cleanup on some?