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Old 25th January 2016, 20:53   #778  |  Link
GamBIT_Rus
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Join Date: Jan 2016
Posts: 11
Quote:
Originally Posted by r0lZ View Post
I will certainly NEVER implement a crop feature for 3D output. It's a total absurdity. The 3D video standard IMPOSES the 16:9 aspect ratio. And the 3D clips must be in HD. So, ONLY 1920x1080 and, to some extent, 720x1280 are legit for 3D clips. Many TVs do not support other aspect ratios at all, or they deform the image horribly to restore a full-screen display (like my Samsung). And anyway, probably all 3D TVs are optimised to play the 3D features in full HD, and are much less good when they must play butchered 3D videos. And it's not because other aspect ratios or resolutions can be played without problem by some (relatively rare) players that it's a good idea to do it.

I add that cropping the black bars is not really a gain of disc space, because the pure black can be compressed extremely well, and therefore it is really a bad idea to sacrifice quality and compatibility just for a few MBs of disc space.

In short, cropping the 3D videos is unfortunately a common mistake, and I will certainly not encourage peoples to do it.
I think you didnt understand me.
I was telling not about smth like 1920*1600 mkv (instead of 1920*2160). BTW I encode only 1920*2160.
Crop is not ONLY the chopped black borders. Such cutting is really bad of the proportion problems indeed, I know it as the LG owner (1920*1600 are never going right, although 1920*800 play well - LG TV soft peculiarities).

A CROP I was telling about is the following:
1. encoder cuts and the up/bottom black borders and some vertical columns - so that the resulted aspect is still the same, 16:9, but in the picture are only the bright info pixels.
2. After that, the image is upscaled to the initial 1920*1080 due to compatibility, so that we get the standard aspect and size. Both.

YES, the picture is not the same, it is like focused on the centre so that there's no borders at all nowhere. 3D effects are not harmed, that's important. There's some resolution loss, yes indeed, but everything plays well anywhere. Especially do love this thing the owners of a small diagonal TVs. Unfortunately most of the TVs are able to change the aspect in the very rare cases. My 4K LG (for ex) is almost helpless to change the aspect. More cheaper TVs are all the more helpless. The only way is to hardcode such a picture. BTW people assume that such 4-way cropped videos get the better 3D rolls and effects than the standard picture. I think of the bigger details in visual.
Even if you do not desire to do such crops, I think it would be good if the others could. Like 720 that you do not use (and I do not use) but the others do. And it is not a simply cutted up/bottom video.
I see that the BD3D2MK3D can do it easy and with the best quality due to x.264 and a perfect avisynth algorithms.
Hope, now you did understand me right.
?
If so I could set out the vision of how it could be implemented with the best usability. Thanks.
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