Welcome to the Doom9 forums, dm9656.
Quote:
Originally Posted by dm9656
[...] option : "Full SBS/..." / "Use respectively 32:9..." [...] AND you manually edit the aspect ratio in file "__MUX_3D_OPTIONS.txt" to "16/9" instead of the value you'll find there
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It's a contradiction. If you DON'T tick the option "Use respectively 32:9 or 16:18 AR", then the aspect ratio in __MUX_3D_OPTIONS.txt will be 16:9. It's the only thing that is changed with that option.
The 2:1 or 1:2 SAR is different, as it is used by x264 or x265 during the encoding and is included in the video stream itself.
So, if I understand correctly, for your LG, you should set the AR to 16:9 and the SAR to 1:2 / 2:1, and it should not be necessary to manually edit any file.
Quote:
Originally Posted by dm9656
- however, the subtitles will have problems: in FTAB, they will display both up and down of the picture; in FSBS, they will display only in one side (left). The reason is that the subtitles pictures are generated in a format that has not the same size as the FTAB or FSBS encoded picture (ex: 1920x1080 instead of 1920x2160); and I think the TV needs the 3D subtitle picture to be the same size as the FTAB picture to display it correctly along the movie picture.
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Correct. Unfortunately, currently, the free tools that are able to edit the SUP files are made for the standard resolutions, SD (PAL or NTSC), "small-HD" (720p) and Full-HD (1080p). The other formats (UHD and 3D) are currently not supported.
Note also that currently, it is not possible to generate the 3D subtitles for Full-SBS or Full-TAB, as they require a larger resolution (in one direction only) than Full-HD.
Some players are able to display the 2D subtitles correctly, including PotPlayer, my preferred video player for Windows. It has an option to display the subtitles before or after the rendering of the video. For the 3D movies, that means that it can display the subtitles over the whole SBS/TAB video, before the cut of the two views, and that leads to the problem you have described. But it can also display the 2D subtitle after the cut of the two views, and in that case, the 2D subtitles are perfectly centered on screen, like in the original BD. (It's the first mode that is required to display properly the 3D subtitles for Half-SBS/TAB, as they have the same resolution and dual view as the 3D video format, and the second mode must be used to display the 2D subtitles over any 3D video.) Perhaps your TV or player has a similar option?
Otherwise, many players have also an option to ignore the position of the subtitles encoded in the SUP file and display them anyway somewhere in the bottom-center of the screen, or in the black bars of a Cinemascope movie. Such option can help too.
Unfortunately, the hardware players (TVs, projectors, BD-players and other multimedia boxes) have often only a very basic player with very few options, and it is not possible to modify the subtitles for proper playback of 3D material.
Quote:
Originally Posted by dm9656
So, my guess for a solution to this problem is to have options to generate the 3D subtitle pictures with the same resolution & aspect ration as the FTAB or FSBS frame instead of the target (2D) size.
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Correct, but as I wrote above, the current tools are not able to do it. Otherwise, I would have implemented that option.
Quote:
Originally Posted by dm9656
As for Frame Sequence, I could not make it work properly, there are too few players out there able to play it correctly.
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FS is indeed not well supported, but it is necessary for some old "3D ready" projectors that cannot handle the (relatively new) SBS and TAB formats.
Quote:
Originally Posted by dm9656
Meanwhile, if somebody could give me some hints for generating the 3D subtitles at the desired resolution? Is there a way to tweak BD3D2MK3D ?
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As I wrote above, there is currently no way to generate 3D subtitles for Full-SBS or Full-TAB. Try to play with the options of your player, or connect your PC to your TV and use a good software player that can handle the subtitles correctly to send a correctly decoded video stream with the subtitles (@23.976x2 fps) to the TV via HDMI.
In the future, perhaps a better tool to edit UHD SUP files will be available. I am currently helping someone to write an app that should be able to produce UHD 3D subtitles, but it is not ready yet...