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17th October 2013, 19:53 | #1 | Link | |||||
HeartlessS Usurer
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What is the better HD dimension switch
Prompted by several posts in other threads
StainlessS: Quote:
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The question relates to which default conversion Matrix to use based on frame size.
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I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 19th October 2013 at 11:50. |
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17th October 2013, 21:38 | #2 | Link |
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I think I'm missing some context here. The color space is a source property. If I resize a 1080p movie down to 400 x 300, it's still rec 709, isn't it?
Where is this decision about color space supposed to take place? |
17th October 2013, 22:36 | #3 | Link |
HeartlessS Usurer
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OOOps, of course you are correct, for rec709 read High Definition.
The question relates to which default conversion Matrix to use based on frame size.
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I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? |
17th October 2013, 23:24 | #4 | Link |
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My vote goes to the SamKook option. Although for PAL-country you should put the boundary at 1024.
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17th October 2013, 23:40 | #5 | Link | ||||||
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ffdshow:
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MadVR: Quote:
LAV Filters and MSDN: Quote:
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Indeed, hopefully we'll have a conclusive answer. |
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18th October 2013, 01:33 | #6 | Link | |
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Quote:
I would say that ffdshow, madshi and nevcairiel(not in LAV though since if someone were to crop 2px from the width and height it could be considered SD) got it right with: width > 1024 or height > 576(600 is just a rounded up number and would work fine too, especially if someone decided to add a few vertical px for some reason to his encode which is the same reason I went with >=900 instead of >854. I've seen encodes with screwed up ratio go up to something like 894 in width for NTSC). A width of more than 1024 will necessarily mean a HD source since it's the absolute maximum width for SD and it's the same thing for the height since SD shouldn't be more than 576 so that also means an HD source. An anamorphic HD source will have a width bigger than 1024 even if its height is below 576 and a 4:3 HD source with a width below 1024 will necessarily have an height of over 576 to keep the ratio(unless it's letterboxed and drops below it after removing the black bars, but that would be an exceptionally rare case and not really HD anymore).
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18th October 2013, 18:30 | #7 | Link |
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Not if you create anamorphic assets (DVD menus, rendered stuff...) targeted at 720x576 with ITU compliant scaling – in that case you create in 1048x576 or 1050x576 (1050 is the BBC recommendation for example).
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19th October 2013, 01:12 | #8 | Link |
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You learn new things every day.
So would rounding up to the following catch all less known/unusual case without adverse effect: width > 1100 or height > 600 It's still low enough not to miss any HD stuff as far as I can think and gives enough room over the biggest SD stuff I can think of.
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