BNK files won't work with ww2ogg. You have to extract the audio files out of the container first.
EDIT: Upon further inspection, I am unsure how to convert the files inside the BNK archive as ww2ogg states the the RIFF is truncated.
I've managed to convert the .wem files just fine using ww2ogg v0.22. If you drag and drop multiple files onto ww2ogg it won't work, you need to use a batch file instead or type it into the command line.
Save this into a .bat file and run it with the .wem files and it should convert them just fine :)
for %%i in (*.wem) do ww2ogg "%%i" --pcb packed_codebooks_aoTuV_603.bin
After it has converted them, you need to run the .ogg files through revorb as well.
edited 5:05 AM EST November 2, 2014
thanks! by robotortoise at 2:07 PM EST on November 2, 2014