Jeff Cottrone
August 5th, 2006, 08:23 PM
I understand the whole argument that you can't add pixel detail that isn't there in the first place. But I've seen footage that has been uprezzed using Instant HD and think it looks better. And, more importantly, I'm trying to understand how all this upscaling/downscaling stuff works (in terms of video file size, timeline size, output size, and then how it plays back on both computers and tv sets).
Let's say I have a video file that is NTSC DV 720x480 (.9) at 23.976.
If I take my video and place it in (extreme example) a 2k 2048 x 1556 timeline, AE blows it up so only a small portion of the middle of the 720x480 frame is viewable. Granted, one would normally upscale to a more reasonable size, but even so, the original framing is still lost. So how does this work without losing the framing?
Also, what size do I then output at? Using this extreme example of upscaling 720x480 to 2k, if I output at 2k, what is needed to view it? Do computer video players (like WMV) automatically detect the size and can therefore play it? Or does it downconvert the 2k video to the maximum screen resolution you have? Or do you need a 2k monitor for it to play?
Same thing for DVDs and tv sets...do you need a Blu-Ray dvd player to play a 2k video file on a tv? Will a 1080 HD tv set only play up to that size? Or does it automatically downsize a 2k or 4k resolution to 1080 so it can still play it? How does this work?
I don't know if this is how Instant HD works, but, in theory, why couldn't you take a 720x480 video and blow it up to 4k by filling in the missing pixels with the same colors, then downconvert it back to a normal playback size? Wouldn't you get a better rendition of the colors like we see when real 2k HD captured footage is downscaled? Granted, you can't fill in the missing detail that the real 2k HD camera captures, but shouldn't you be able to get better, richer colors?
I'd really appreciate someone taking the time to explain each step of those questions and the theory part too. Or point me to a thread or website that does. I haven't found one yet. Thanks.
Let's say I have a video file that is NTSC DV 720x480 (.9) at 23.976.
If I take my video and place it in (extreme example) a 2k 2048 x 1556 timeline, AE blows it up so only a small portion of the middle of the 720x480 frame is viewable. Granted, one would normally upscale to a more reasonable size, but even so, the original framing is still lost. So how does this work without losing the framing?
Also, what size do I then output at? Using this extreme example of upscaling 720x480 to 2k, if I output at 2k, what is needed to view it? Do computer video players (like WMV) automatically detect the size and can therefore play it? Or does it downconvert the 2k video to the maximum screen resolution you have? Or do you need a 2k monitor for it to play?
Same thing for DVDs and tv sets...do you need a Blu-Ray dvd player to play a 2k video file on a tv? Will a 1080 HD tv set only play up to that size? Or does it automatically downsize a 2k or 4k resolution to 1080 so it can still play it? How does this work?
I don't know if this is how Instant HD works, but, in theory, why couldn't you take a 720x480 video and blow it up to 4k by filling in the missing pixels with the same colors, then downconvert it back to a normal playback size? Wouldn't you get a better rendition of the colors like we see when real 2k HD captured footage is downscaled? Granted, you can't fill in the missing detail that the real 2k HD camera captures, but shouldn't you be able to get better, richer colors?
I'd really appreciate someone taking the time to explain each step of those questions and the theory part too. Or point me to a thread or website that does. I haven't found one yet. Thanks.