Re: about sub

kitten · Post by **kitten** » Sat Feb 20, 2021 4:47 pm

hey~

How to make 3D subtitles? The 3D subtitles I made now play in the cinema. It looks dizzy

I have a left/right eye 3D frame in MKV format.
There is a SRT subtitle, which has no left/right eyes
I imported the movie and subtitles, and chose "subtitle as image input"Making 3D DCP

When I try to play in the cinema, I feel dizzy when I watch the subtitles with 3D glasses, and the effect is not very good

Carsten · Post by **Carsten** » Sat Feb 20, 2021 5:18 pm

I guess we need some more information to answer that question.

Post by **carl** » Sat Feb 20, 2021 10:20 pm

So did you burn the subtitles into the DCP? At the moment this just overlays the same on both eyes. Perhaps this looks strange? Maybe we should try to move the subtitles out of the screen?

kitten · Post by **kitten** » Sun Feb 21, 2021 2:09 am

Of course, I make subtitles into "subtitles have image output", and then make them into DCP. When I play them in the future, the picture will have 3D effect, but the subtitles will not.

kitten · Post by **kitten** » Sun Feb 21, 2021 1:11 pm

I have checked this position
“burn subtitles into image"and "3D"
But the DCP, the subtitle, has no 3D effect

Can someone help me?

Carsten · Post by **Carsten** » Sun Feb 21, 2021 4:20 pm

Well, actually it DOES have 3D effect - just that, the subtitle is always positioned in the screen plane (zero parallax). That is not optimal if it overlays 3D image elements that protrude forward from the screen (negative parallax). The trouble ist, to properly place subtitles in 3D space, you would have to align every subtitle with the 3D depth aspects of the scene. That is a heck of a lot of work, as there is usually no one-size-fits-all setting.
In those cases where I have seen 3D captions so far, they have always been rendered into the image with their own depth settings. But these are usually a few captions per feature, not a fully subtitled one.

Post by **carl** » Sun Feb 21, 2021 11:08 pm

Indeed, it wouldn't be so hard to have a fixed 3D depth for subtitles, but I don't know if that would be any better than always putting them in the plane of the screen. And as far as I can see it's basically impossible to preview this, so you'd have to "hit and hope".

We could try it: I could add a configuration option of how far forward to place subtitles... so long as someone can test it? I no longer have any access to a 3D screen to investigate.