With having 1920x1080 back as an (advanced) option you can work around the scaling problem
of burnt-in bitmapped subs with for for example Blu-ray material. See:
https://dcpomatic.com/mantis/view.php?id=1246
Now I always juggle with an extra 96% X-scaling factor (1920/1998) to get things approx. correct.
Having the DCP-container equal to the size of the source avoids the problem ..
(yes, it would be good to think of a better/permanent solution, but I've been busy ..
1.78 in Version 2.12.6
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Re: 1.78 in Version 2.12.6
Well, not the best solution to that problem. Keep in mind, these DCPs can cause issues on real servers. No trouble if you create them for your own, but I would not let a 16:9 container into the wild. That said, 16:9 containers are probably a bit less risky, since a lot of ads used to be converted into 16:9.
ISDCF is currently preparing a document that constraints SMPTE allowed DCP options into a 'best mastering practice' recommendation. Among it, only flat or scope containers. Full container only for testing purposes, not to play to the public.
Not sure if I understand that scaling issue at all. When playing a bluray, these subs are laid out to fit the 1920/1080 raster. When we create a DCP, we should use the 1920/1080 source with the subs inserted exactly the same way, then pad to 1998 with black. If we don't want to pad, but zoom to a full 1998*1080, the placement of the sub bitmaps doesn't need to change? I guess I need to do my own tests to see the issue. Again, admitted, I personally see general subtitles as a clumsy aid to help understanding, and am not inclined to see any beauty in their appearance, as long as I can read them. So, forgive my ignorance there...
- Carsten
ISDCF is currently preparing a document that constraints SMPTE allowed DCP options into a 'best mastering practice' recommendation. Among it, only flat or scope containers. Full container only for testing purposes, not to play to the public.
Not sure if I understand that scaling issue at all. When playing a bluray, these subs are laid out to fit the 1920/1080 raster. When we create a DCP, we should use the 1920/1080 source with the subs inserted exactly the same way, then pad to 1998 with black. If we don't want to pad, but zoom to a full 1998*1080, the placement of the sub bitmaps doesn't need to change? I guess I need to do my own tests to see the issue. Again, admitted, I personally see general subtitles as a clumsy aid to help understanding, and am not inclined to see any beauty in their appearance, as long as I can read them. So, forgive my ignorance there...
- Carsten