Tried 1080 movie mode. Viewed 422 with hex editor it's filled with ff ff ff ff... Skype me.
make sure you're taking a single silent pic, in 1080p recording or idle, hit the shutter half way to take a silent pic, it will say it saved a silent pic, it'll be a .422 file on your sd card.
put this file through the 422-jpg.py script:
python 422-jpg.py
and it will pop up a file open dialog, select the .422 file and it'll spit out a jpeg in the same folder as the 422 file.
if you have multiple 422 files to convert,
python 422-jpb.py /folder_path/.
the period says to do every 422 file in that folder.