Welp. I forgot oggenc litters its output oggs with random garbage that’s different on every run.
So now I’ve got 600MB patches every time I make a new build unless I change the build process for this game to copy over the ogg files from the first rom version that got approved. That’s because ogg by default puts a serial number in each internal chunk (i.e. 100s of times in the file at unpredictable offsets) which is seeded randomly every time oggenc runs.
Moral of the story: if you’re running oggenc without “-s 0” to seed the serial number to 0, then you’re doing it wrong. Always, always, always, always.
In fact at one point I even made a custom oggenc that always does that so there’s no way I could forget… except… I forgot to use that custom oggenc this time.
