From my friend who works in IT at a school, here are some screenshots of PDFs:
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Basically, not all HD is created equal. From Wiki:
"Several websites, including YouTube, allow videos to be uploaded in the 1080p format. YouTube streams 1080p content at approximately 4 megabits per second[13] compared to Blu-ray's 30 to 40 megabits per second."
So, while they are both 1080P, a Blu Ray is gonna have up to 10 times as much data to play with in order to make the screen as crystal clear as possible. Youtube, with one tenth as much data, has to compress and reduce quality. Most of my friends and family wouldn't care but it bothers me, my first Blu Ray was a Pixar movie and that melted my eyes and ruined lesser sources forever :P
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my first Blu Ray was a Pixar movie and that melted my eyes and ruined lesser sources forever
So realistic!... oh wait.
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No one mentioned realism...? We were talking about quality.
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I said, I can't imagine. I don't see any artifacts at all. I can barely spot difference between 1080p and 720p (and that's only thanks to thick black outlines of ponies that are supposed to be mathematically perfect B-splines but because of non-infinite resolution you can see individual pixels if you look hard enough; and this kind of thing isn't noticable at all in real movies due to natural noise of the world around us).
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No one mentioned realism...?
Mentioning discussion topics is a barrier to cheap jokes.
I said, I can't imagine. I don't see any artifacts at all.
Yeah, as I said, they're almost unnoticeable in most 1080p sources (especially 2D animations).
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especially 2D animations
2D animations have the most noticable artifacts. See above.
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2D animations have the most noticable artifacts. See above.
On the edges, yeah. But there are hardly any block coding ones - there are more than enough areas of uniform color.
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I can barely spot difference between 1080p and 720p
What size screen? This stuff shows up much more obviously on a larger screen. I can tell the difference even between different "HD" television shows. Some have been over compressed or whatever and look a lot worse than others.
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Oh, and they spelled license wrongly.
FTFY.
Actually it depends; if the exam is from the UK, for example, then 'licence' is a noun and 'license' is a verb so the spelling would be correct.
Of course the TRWTF is the state of IT education in the UK.
Filed under: It's all regional, innit?
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Yeah, another vote for "what's the big deal?"
A few minor hardware fuckups, but otherwise a pretty decent read for computer illiterates. If I could find something like that translated, I'd buy it for my mother.
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Yeah, another vote for "what's the big deal?"
First picture isn't that bad, assuming the excercise is for 1st graders. Second is accurate to the technology of last decade. But the third one is completely wrong (netbooks aren't strong machines; they're as robust as any Turing-machine-compatible hardware; boot time and storage device is independent of term "netbook"; only the last dot states the truth). CAPTCHA thing is completely wrong, even on the most basic level of writing every single letter of this acronym with wrong capitalization. I remember running CAPTCHA solver myself - I was downloading many files from RapidShare several years ago, and it was very handy to have CAPTCHA-ready download manager when I wanted to download multi-part archive overnight. Later they moved to counting kittens and my program became useless.The last one picture is either the least or the most bad - it's 80% correct, but they are wrong on the most important aspect: security. Your data is about as much insecure no matter if it's on the earth or in the clouds. And they shoe-horned open source software just for sake of completeness (measured by checklist of topics covered). Open source doesn't have to be free. Proprietary software doesn't always come with technical help. And the more security features they claim the proprietary software to have, the more potential for security bugs (because more code = more fuckups).
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Streaming HD isn't very good ...
Yes it is. My home bandwidth is good enough that I can stream ultraHD (4K as I understand it) over Netflix. I don't have any screens capable of displaying such high resolution, but I can stream it.
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Depends what you consider HD I guess. The quality on the "HD" streams I've seen is nothing like Blu ray. Ditto for compressed rips. There's just no comparison to a movie on Blu Ray, at least for me.
Most streaming services automatically adjust their quality based on your connection speed. Netflix and Amazon will actually tell you (if you look) what kind of resolution you're getting. Sounds like you're just looking for "HD" and not actually looking for the resolution. HD covers a wide range of resolutions: 720p, 1080i, and 1080p being the most common. Are you certain that the HD you're looking at isn't 720p or 1080i?
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It's like those maths questions where a train is going 120 miles an hour or whatever. You're not supposed to argue that it's unrealistic for a train to maintain that exact speed for that amount of time
Ever hear of a bullet train?
The Shinkansen ... is a network of high-speed railway lines in Japan operated by four Japan Railways Group companies. Starting with the Tōkaidō Shinkansen (515.4 km) in 1964, the network has expanded to currently consist of 2,387.7 km (1,483.6 mi) of lines with maximum speeds of 240–320 km/h (150–200 mph), 283.5 km (176.2 mi) of Mini-shinkansen lines with a maximum speed of 130 km/h (80 mph), and 10.3 km (6.4 mi) of spur lines with Shinkansen services.1
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Are you certain that the HD you're looking at isn't 720p or 1080i?
More importantly; if you can't tell the difference, does it matter?
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does it matter
only if you were promised 1080p and all you were given was 720p.
if you knew you were getting 720p then.... meh. only if you care about the e-peen contest that is having the biggest pixel monitor...
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if you knew you were getting 720p then.... meh. only if you care about the e-peen contest that is having the biggest pixel monitor...
I watch Netflix on my TV.
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There is technically definitely such a thing as captcha breaking software. What you do is, you are a shady person with a bunch of shady websites that a bunch of people comment on, and you write bots that write comments on captcha protected websites. And you then proceed to simply serve the captchas your bots encounter to the humans on your own sites as if they are your own captchas.
The one I've heard of is similar, but instead of hosting shady forums, you offer free porn in return for completing captchas.
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if you can't tell the difference
If you can't tell the difference between 720p and 1080p, then you don't have a very high res screen. Or you need your vision corrrected.
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For watching video, I don't notice if it's SD or HD. I probably could if I was looking out for it, but I don't tend to be looking for artefacts or pixelation when there's more interesting stuff on screen
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when there's more interesting stuff on screen
hmm... what could keep your attention that strongly....
have you been borrowing @algorythmics's home videos again?
;-)
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For watching video, I don't notice if it's SD or HD. I probably could if I was looking out for it, but I don't tend to be looking for artefacts or pixelation when there's more interesting stuff on screen
I didn't say anything about SD. SD is 480i (480p is enhanced definition, though some would still classify it as SD). 720p and 1080p are both considered HD.
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My point was that I don't care about the relatively bigger jump from SD to HD, so between different flavours of HD there is, IMO, no point worrying.
For gaming and general computer real estate it's different of course
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Given you either have an archaic commercial solution, a current commercial solution with horrible support, or a in-house solution where you are already supporting yourself...
Um, It's open source.
You support yourself, and report the changes so everyone gets the benefit.I mean, if none of the above are true, your developers won't be complaining.
I don't understand why companies want to have top-quality commercial support in order to approve using a certain software. I have never experienced support from mega-corp commercial software that was any better than, "We'll include the fix in the next release, in 8 months".
Whereas with open source software, we've fixed it and merge the fix in github. And we have "support" from a whole community.
There's a few bad ones out there, like RavenDB, which seems to be completely controlled, and any efforts to submit improvements, disagree with the feature set, or even ask a damn question seems to get only aggressive retorts.
But that doesn't mean it's all like that.
In fact, I'd put money on the percent of bad apples in commercial software is >= the percent of bad apples in open source.
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My point was that I don't care about the relatively bigger jump from SD to HD, so between different flavours of HD there is, IMO, no point worrying.
480i/480p - 720x480 = 345,600 pixels
720p - 1280x720 = 921,600 pixels
1080i/1080p - 1920x1080 = 2,073,600 pixels
From 480 to 720
240 additional lines (50% increase); 576,000 more pixels (167% increase)From 720 to 1080
360 additional lines(50% increase); 1,152,000 more pixels (125% increase)"relatively bigger jump" ... Right ...
Well, I suppose so, if you're only looking at the percent increase of pixels. Though I kind of discount that because the ratios aren't the same since standard def was defined on a 4:3 aspect ratio and high def is defined based on a 16:9 aspect ratio.
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top-quality commercial support
The only time I've seen it come in handy is installing / configuring some WTFy stuff.
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Um, It's open source.You support yourself, and report the changes so everyone gets the benefit.
Snort. I certainly don't have the time to track down, report, and/or fix bugs in third-party software. That's why people buy support contracts. It looks like NSIS did that for a while and then stopped.
It wouldn't bother me personally because what're the odds there'd be a problem, but my boss said no.
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Whereas with open source software, we've fixed it and merge the fix in github.
BTW, with my company's proprietary software, we will generally take bug reports and fix problems as they occur, and deliver fixes immediately to the customer who reported the problem, and we put out updates more or less weekly.
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What size screen? This stuff shows up much more obviously on a larger screen. I can tell the difference even between different "HD" television shows. Some have been over compressed or whatever and look a lot worse than others.
I'm surprised that it took so long for that factor to come up.
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@Intercourse said:
Yeah, that was the EeePC. I do not recall seeing any on the market that ran entirely from SD card though. I could certainly be wrong.
The Eee Surf had an SD card soldered to the motherboard, and a slot for a second SD card. It was available in white or black, with 2GB or 4GB of Intel® FLASH!® storage respectively.
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netbooks aren't strong machines; they're as robust as any Turing-machine-compatible hardware
I think they're thinking Panasonic Toughbook rather than Intel Xeon Phi or POWER8.
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I think they're thinking Panasonic Toughbook rather than Intel Xeon Phi or POWER8.
And here comes my PTSD. I worked on a site for Panasic Toughbooks that I wish I had the source to, it'd end up on this site.
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The Eee Surf had an SD card soldered to the motherboard,
I stand corrected. I was not aware that any of them made it on sale to the general public.
2GB drive and 512MB of RAM. Nice combo. ;)
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Most streaming services throw 720p (1280x720) and that's the maximum resolution of the Roku for example. Streaming in full HD 1080i to a 100 customers is expensive.
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I can't imagine how much you can improve over YouTube's 1080p in image quality
I have a 4K monitor. I can't full-screen Youtube videos anymore because they look like pixelated arse.
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I can't watch any video over 480p because my ISP can't handle more than that. At night, it's more like 144p as the max.
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Sure you can. 1080p is a resolution, not a bitrate. I'm not sure why most of the people in the thread above believe that delivering content in 1080p means that it won't look like compressed dog vomit.
The cable companies figured out long ago that they can get more HD channels to your TV without upgrading their infrastructure by lowering the bitrate to the point where they were effectively delivering SD. They also found that customers would pay more for 200 crappy HD channels than they would for either 200 SD channels or for 50 good looking HD channels.
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1080p is a resolution, not a bitrate.
well yes.... but there is a limit to how small you can compress that....
doing some back of the napkin calculations....
1920x1080x25x3 ~= 150MBps uncompressed.
which at "bluray" quality encoding using the H264 codec should yield a stream at about 0.5 to 1.0 MBps depending on source media and all exactly how you tuned the knobs.
/me goes to check some of my media files
hmm... i have here TheWindRises.mkv clocking in at 3.5GB from bluray source. IMDb says the runtime of that movie is 126 minutes so we have..... math math math just under half a meg/sec. just at the bottom edge of what my calculations predict.
i don't have any live action blurays to compare how live action compresses vs. anime... but typically animated sources compress better than film sources.
now that's a nice upper limit (for now) anyway... but there's still a lower limit where you've pushed the quality down so far you've effectively cut the resolution to 720p or even 480p. at that point it's still technically 1080p but you're not getting any of that better quality.
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i don't have any live action blurays to compare how live action compresses vs. anime...
Natch.
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YouTube has choices for which resolution I want to watch, not which bitrate I want to watch.
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Natch.
yeah yeah, weeaboo and all that. been there. seen that. got the t-shirt.
i do have the numbers for DVDs, i just havent bought many bluerays since i got the player for them.
if you're curious, some further number crunching yields that for the digitization settings i use for h264 animated sources compress about 33% better than film sources.
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I don't have much animation, but I have close to 1000 Blu-rays that I ripped myself. I sometimes try to predict how large a rip will be based on the length of the movie and what I know about it. I'm usually wrong. Today Guardians of the Galaxy ripped down to quite a bit less than half the size of Captain Phillips, even though both were ripped with the same settings.
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I can't watch any video over 480p because my ISP can't handle more than that
You need to move, dude.
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In fact, I'd put money on the percent of bad apples in commercial software is >= the percent of bad apples in open source.
I'm frequently astonished by folks who choose to pay vast sums for the exact same lack of support they could have had for nothing.
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I can't full-screen Youtube videos anymore because they look like pixelated arse.
That's because the Flash plugin makes a shitty movie renderer. Video DownloadHelper and any half decent stand-alone media player application will work better for you.
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And they actually give you a fully loaded video.
Unlike the flash player which sometimes gets into buffering... territory for me.
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I have a 4K monitor. I can't full-screen Youtube videos anymore because they look like pixelated arse.
If scaling factor is whole number, it shouldn't be issue. Unless you have yo-momma-waist-inches screen. Or if scaling factor isn't whole number, naturally.
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Yes it is. My home bandwidth is good enough that I can stream ultraHD (4K as I understand it) over Netflix. I don't have any screens capable of displaying such high resolution, but I can stream it.
shrugs I'm sure you get that many pixels but I doubt the picture looks as crisp, clear and colourful as the same thing off a Blu Ray (or whatever a 4K movie comes on :P ) You can broadcast any old garbage in "1080P", doesn't mean it'll look as good as a top end Blu Ray movie, just that it has the potential to.Most streaming services automatically adjust their quality based on your connection speed. Netflix and Amazon will actually tell you (if you look) what kind of resolution you're getting.
Yeah but the same res doesn't mean the same quality. Youtube is compressed to shit even at "1080P". A Blu Ray is a different galaxy of quality. At least, to my eyes. My friends/family (and some folks in this thread) don't see/don't care about the difference. That's fine too. Hell, it's cheaper
@abarker said:Ever hear of a bullet train?
Yes, but not one that goes from 0 - 120 MPH instantly, runs for an hour at that exact speed, and then stops instantly. Unrealistic question, I refuse to answer, rant rant rant!
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a Blu Ray (or whatever a 4K movie comes on )
Nothing, at the moment. They invented a 4K Blu-Ray but the technology isn't licensed yet. Players are expected late next year. I learned this while my father-in-law was insisting he HAD to buy a 4k TV for Christmas XD
Amazon.com
