In fact, what I said before was not completely true. I can record, but not always, not systematically. Sometimes, I do not understand why, the mirror 16/9 oculus windows kind of takes over, but the game freezes. I mean the game in its 9/16 window. So, I move the pointer back in the 9/16 oculus window, and the sim works again, but I cannot record what is displayed in the mirror window in this situation. So I put the pointer back in this mirror 16/9 window, but the game freezes again. I do that several times, and, suddenly, for a reason which I'm unable to identify, everything works. I am in the game, and in the mirror window. So I can fly and record. People behind my shoulders can watch what I see in my Oculus headset.
I use FRAPS.
I make something wrong, but what? Again thanks friends for helping me
And thank you SkateZilla. Could you tell me step by step how to proceed to toggle the Mirror to 1080, and so on? I'm lost.