relaxpi4 wrote: ↑
Tue Sep 10, 2019 1:28 pm
i am very happy to see that Pi 4 has two hdmi output.
Does it actually mean , we can use two different videos (left and right view for 3D) and play it in perfect sync?
Or one full sidebyside video (3840x1080 or 2560x720) and playback to the extended display? Is it possible?
If somebody could test it for me i can upload such files.
What displays do you hope to output to? How will you view them as stereo?
AFAIK most 3D displays use a single input port for both eye views, which takes care of synchronisation.
To get good stereo effect on a large screen I suspect you need to go for per-eye filters such as those used with 3dTVs because you probably can't get the optics to work like a headset with one screen for each eye.
Eye convergence is an important factor and two big screens, one per eye, would require the eyes to diverge a lot.
I see your later post mentions dual projectors. How do you get 3D from that? Are they projecting to separate screens? Can you match the view to the users inter-pupillary distance and get the eyes to converge at the centre of each screen? Have you tried this with still images?
ETA is this a polarised system? Two projectors onto the one screen, one through H-polariser the other through V-polariser? If you can match projection geometry between them so that everything lines up that could work I suppose.