Why not make the Blu-ray a 2D/3D combo Blu-ray? - Blu-ray Forum

tripletopper · 06-13-2022, 05:48 PM

Most of these new movies give you three discs anyway: a 4K a Blu-ray and a DVD. Why in the heck do you need a Blu-ray when you have a 4K disc? The only practical reason why I would buy a 4K plus Blu-ray is if the Blu-ray was a 2D/3D combo Blu-ray.

How easy is it to make a 2d 3D Blu-ray? In terms of the art of movie making it cost nothing. Just have the director do the gun sight test to determine whether he's left-eyed or right-eyed as his/her dominant eye. Make that the overt eye and encode the other eye so that if you're playing on a 2d tv/player, it just skips over the second eye. Sort of like the Dolby soundtrack whenever you're playing on a plain two speaker stereo TV.

There is no advantage to a separate 2D version and a 3D version of a disc that I could think of. The advantage of a 2d 3D combo disc is that you can watch it either in 2d or 3d.

Just because you CAN watch it in 3d doesn't mean you HAVE TO don the shades every single time.

If your equipment is not 3D from beginning to end, then they basically just treat it like a 2d Blu-ray. No harm no foul.

This would be the real test of 3D haters: if the only way you could buy a movie on Blu-ray or higher is with a 3D / 2D combo Blu-ray, would that movie get boycotted just because it gives people the ability to watch it in 3D even though it doesn't personally affect them?

If so then it's more about controlling content that it is about advancing the art.

The only reason why 3D hatred was a thing to begin with in the first place was August 2011 when the people of Parma Ohio locally reported that the upcoming 2012 Super Bowl was going to be 3D and that was going to lock people out who did not jump on board 3D.

It's a lot easier to make 3D content into 2D content: just poke out one of Thor's eyes.

By the way for those who believe the rumor that Bewitched with refilmed shot for shot perfectly both in black and white in color remember the ntsc standard in the 1950s allowed for interoperability between black and white and color content and stations. So Bewitched was in color. It's just that nobody except people of Rockefeller type wealth knew about it.

3D/2D interoperability is the key to making 3D more readily available. This should apply with TVs with the ability to add on active 3D shutters a a la the Sega Master System. This should apply to movies where Blu-rays are 2D 3D combo Blu-rays. And this should apply to broadcasting where if they're going to shoot a TV show in 30 Hertz anyway why not save the other 30 Hertz for the second eye?

joenostalgia23 · 06-14-2022, 12:06 AM

The reason they have separate 2D and 3D discs is because, often, neither of the L/R eye will match the 2D version.

This is true of animated films, like Disney's Tangled, where the depth of field is different in the 2D version so just watching the Right eye of the 3D version wouldn't be the same.

The same is true for 3D conversions, usually both eyes are modified from the original 2D capture. And in some films like Jurassic Park, the 3D version is different in ways like adding additional atmospheric effects like rain into a shot.

There are movies already that have the 2D and 3D versions on the same disc like Dredd or Journey to the Center of the Earth. But it is more common when the film is actually shot with 3D cameras.

Finally, sometimes a 2D BD is desirable because it can maximize bitrate for the 2D only transfer. Or alternatively, all of the special features are included on the 2D disc so the 3D disc can only house the 3D content.

Just_Discovered_3D · 06-14-2022, 04:39 AM

Quote:

Originally Posted by joenostalgia23

The reason they have separate 2D and 3D discs is because, often, neither of the L/R eye will match the 2D version.

This is true of animated films, like Disney's Tangled, where the depth of field is different in the 2D version so just watching the Right eye of the 3D version wouldn't be the same.

The same is true for 3D conversions, usually both eyes are modified from the original 2D capture. And in some films like Jurassic Park, the 3D version is different in ways like adding additional atmospheric effects like rain into a shot.

There are movies already that have the 2D and 3D versions on the same disc like Dredd or Journey to the Center of the Earth. But it is more common when the film is actually shot with 3D cameras.

Finally, sometimes a 2D BD is desirable because it can maximize bitrate for the 2D only transfer. Or alternatively, all of the special features are included on the 2D disc so the 3D disc can only house the 3D content.

If the left eye video from the 3D were the only 2D version ever released then we could solve that problem?

In my poring over of scenes in Shang-chi, I've come to the conclusion that when CGI is built for 2D first, it gimps the 3D in ways that can't be compensated for by the conversion crew. If films were designed for 3D first, I believe they could be more correctly downscaled to 2D than the inverse has been.

Jay G. · 02-21-2023, 06:07 PM

Another issue is that the 3D versions of modern movies often utilize a "floating window," where black bars on the sides of the image may shrink and grow to enhance the 3D effect. It's practically invisible when watching in 3D, especially since it may only be on the image for one eye, but if you watched this version in 2D, the constantly shifting black bars may be distracting.

A video showing the effect:

An article on the effect:
https://3droundabout.com/2011/11/543...g-windows.html

A more in-depth whitepaper on the effect:
https://michaelscroggins.files.wordp...whitepaper.pdf

A video presentation of the whitepaper:

06-13-2022, 05:48 PM	#1
tripletopper Active Member Member since:Mar 2017 Blu-ray reviews:1	Why not make the Blu-ray a 2D/3D combo Blu-ray? Most of these new movies give you three discs anyway: a 4K a Blu-ray and a DVD. Why in the heck do you need a Blu-ray when you have a 4K disc? The only practical reason why I would buy a 4K plus Blu-ray is if the Blu-ray was a 2D/3D combo Blu-ray. How easy is it to make a 2d 3D Blu-ray? In terms of the art of movie making it cost nothing. Just have the director do the gun sight test to determine whether he's left-eyed or right-eyed as his/her dominant eye. Make that the overt eye and encode the other eye so that if you're playing on a 2d tv/player, it just skips over the second eye. Sort of like the Dolby soundtrack whenever you're playing on a plain two speaker stereo TV. There is no advantage to a separate 2D version and a 3D version of a disc that I could think of. The advantage of a 2d 3D combo disc is that you can watch it either in 2d or 3d. Just because you CAN watch it in 3d doesn't mean you HAVE TO don the shades every single time. If your equipment is not 3D from beginning to end, then they basically just treat it like a 2d Blu-ray. No harm no foul. This would be the real test of 3D haters: if the only way you could buy a movie on Blu-ray or higher is with a 3D / 2D combo Blu-ray, would that movie get boycotted just because it gives people the ability to watch it in 3D even though it doesn't personally affect them? If so then it's more about controlling content that it is about advancing the art. The only reason why 3D hatred was a thing to begin with in the first place was August 2011 when the people of Parma Ohio locally reported that the upcoming 2012 Super Bowl was going to be 3D and that was going to lock people out who did not jump on board 3D. It's a lot easier to make 3D content into 2D content: just poke out one of Thor's eyes. By the way for those who believe the rumor that Bewitched with refilmed shot for shot perfectly both in black and white in color remember the ntsc standard in the 1950s allowed for interoperability between black and white and color content and stations. So Bewitched was in color. It's just that nobody except people of Rockefeller type wealth knew about it. 3D/2D interoperability is the key to making 3D more readily available. This should apply with TVs with the ability to add on active 3D shutters a a la the Sega Master System. This should apply to movies where Blu-rays are 2D 3D combo Blu-rays. And this should apply to broadcasting where if they're going to shoot a TV show in 30 Hertz anyway why not save the other 30 Hertz for the second eye?

06-14-2022, 12:06 AM	#2
joenostalgia23 Blu-ray Samurai Member since:Mar 2009 4K collection:578 Blu-ray collection:4533 DVD collection:236 Digital collection:43 iTunes collection:61 Prime collection:1 Trading Score:4	The reason they have separate 2D and 3D discs is because, often, neither of the L/R eye will match the 2D version. This is true of animated films, like Disney's Tangled, where the depth of field is different in the 2D version so just watching the Right eye of the 3D version wouldn't be the same. The same is true for 3D conversions, usually both eyes are modified from the original 2D capture. And in some films like Jurassic Park, the 3D version is different in ways like adding additional atmospheric effects like rain into a shot. There are movies already that have the 2D and 3D versions on the same disc like Dredd or Journey to the Center of the Earth. But it is more common when the film is actually shot with 3D cameras. Finally, sometimes a 2D BD is desirable because it can maximize bitrate for the 2D only transfer. Or alternatively, all of the special features are included on the 2D disc so the 3D disc can only house the 3D content.

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