DVD is petty fixed in what it can take. You may need to find some other method of delivery.
As Jim says, you may need to find a player like my IO-Data (way old and no longer available) that plays Windows Media files from a CD or DVD or USB. But mine is Component video, not HDMI.
Or, get a small PC with HDMI output from the video card to play your video. Maybe even a laptop.
On the other hand, what would the 1:1 player do with a 16:9 or 4:3 image? If it center cuts it, then just drop your footage on to a 16:9 or 4:3 sequence with black bars on the side and see how it looks.
What kind of display is it?