TV screen refresh in Slow motion @ 10,000 FPS

[ZenPunk]

Amazing that even 10,000fps isn't enough to discern the horizontal motion of the beam....

[TheSUBGAMER]

I CANT USE LCD OR LED SCREENS! they "burn' my eyes,i use crt with 120 hz with no problems

what is the solution? lcd with 120 hz/ IPS panel? projector?

[HDXFH]

Good video, it's interesting seeing how they work at reduced speed

[scarabeetle101]

Now film this video in slowmotion- fffffffiiiiiiiiilllllllllmmmmm­mmmmmcccccccceeeeppppttttiiiio­oooonnnnnnn

[MeMyselfAndI534]

CREEPY

[gilajeanne]

at 0:27 0:28 0:30 you can see the face of a person

[itsabomberscope]

Strange all the books show a zigzag motion for the scan lines.

[AllofVideos]

I must ask... what show were you watching?

[anibal120]

ajaj k d pingaaaa.

[JinSaotome113]

THAT'S DR. OZ!

I watch that every day : )

[laubeatz]

this is how chuck norris watches tv

[RICKROLLBLENDER]

this is the reason why PAL is better then NTSC

[johnathon124]

@RICKROLLBLENDER no it isnt.. it used to be, but NTSC is much better now.

[Corey497]

thats cool, i always thought the screen was refreshed in a zig-zag pattern starting from the bottom right corner going up

[wainblatrobert]

@Corey497 haha why?

[denownden]

This is.. Fucking awesome

[dardan156]

so this explains why when you record a tv with a video camera it does that thing with the screen sicck!

[1Nekit1]

MAKE A SLOW-MO PORN PLZ!!!!!

[minimushrom]

whats your job that u can pay such a lot of money for one cam? i think u got more than one ;)

u work with slwo motion in ur job too?

[xhikomarux]

awww man, ive always wanted to do this, but on a computer, such as changing, minimizing, or opening windows... could you do this for me fine sir??

[tekhiun]

could you film an led or lcd display ?? 

[xraptor10]

Casio has a wonderful line of slow mo cameras that are a reasonably

Casio Exilim

[J1NB417741]

I was thinkingabout who designed the television.. that led to pc screens, like the one im looking at now... This is a complete Mind Fuck!

[quangluu96]

we can only see around 60hz so dont waste ur money on like 700hz TV waste it on the resolution and get a tv of around 75hz or 120hz

[mosfetrob]

@quangluu96 that's not completely true.... take a 120htz television and watch it side by side to a regular 60htz tv... you WILL notice a difference.... the difference will look like that of camera trickery in some films.... remember multiplicity? how weird it looked when the camera panned back and forth with multiple 'copies' of dude? that's because the panning was all DIGITAL.... the camera itself didn't move.... needless to say.. that's sorta what you get on a 120htz tv screen, you CAN see it

[hamlintyler]

were can i buy a Miro 4?

[ultraslo]

@hamlintyler abelcine.com. They start around 25K

[baxterproduce10]

@ultraslo 25,000? damn, i dont have that kinda money, looks beast though

[VideyoJunkei]

LCD and Plasma screens won't do this, but will show flicker and odd things at high rates too. Hey, take 1 full scan and add all the frames together to get the picture back!

[mikeb1444]

What does LCD do?

[mosfetrob]

@mikeb1444 LCD has no tube... old televisions work like a lightbulb in a vaccum with magnetized particles basically 'floating around' (more complicated than that obviously) and the particles cause a 'reaction' to the inside surface of the screen, causing it to 'light up' and give you a picture on the outside... LCD is a diode of sorts... basically a tiny lightbulb, and there's 1,080 x 720 of those diodes that make up the 'screen' on a new tv... old tv res: about 360.... vs 720p or better w/ LCD

[mikeb1444]

@mosfetrob

I know LCD has no tube. It doesn't have an electron gun. It doesn't have a phosphorescent screen. LCD has R.G.B. apertures stacked on top of each other, and a Backlight shines through them, so the combination of RG&B escaping intensity can give you the desired color. My question is: Do LCD TV's scan like this, or do they stay lit up continuously and simply change the pixel color?

[mosfetrob]

@mikeb1444 don't quote me... LOL... but as far as i KNOW the LCD's ALL refresh at virtually the same time... i mean.. you're talkin' nano seconds or whatever.... again, as far as i know ALL the diodes flash simultaneously with the desired color.... you still have a 'refresh' rate because the diodes have to turn off before turning back on with a different color (in miliseconds usually) next time your at the store, look at the milisecond timing of a monitor, it still refreshes, YES....

[mikeb1444]

So, was this a tube TV or an LCD?

[ultraslo]

@mikeb1444 Tube

[EdwardianGangster]

@mikeb1444 obviously it couldnt be LCD could it

[Spayne007]

how did you light this scene? was the tv refresh bright enough itself to pick up at 10000 fps? what brand cameras are you using?

[ultraslo]

@Spayne007 We used the Miro 4. There was enough light from the screen with the brightness turned up.

Enjoy

[guillermo2501]

5/5

[municsscareme]

420I

[eldiablo9604]

is this why there is black bars in some TVs? i mean the ones that seem to move down the screen when people record

[amayami]

@eldiablo9604 Actually that's referred to as the stroboscopic effect. The refresh rate of the camera and the TV are different, so it fails to pick up certain segments in the recording, presenting itself as a moving black bar, or on higher refresh rates, sometimes a brighter band that scrolls along the screen in the direction of scan.

[eldiablo9604]

yes, i have seen a lot of videos with this, i know what you mean.

[GranKnight87]

@eldiablo9604 Exacly!

[pauljan1988]

It's not dogs that can see this sort of stuff, it's birds, particularly pigeons. They see everything almost infinitley quicker than we do. That's why they seem to take ages before flying off the road to avoid getting ran over; they feel as if they have all the time in the world.

[Laxori666]

say that to the pigeon i just ran over

[masampouka]

i dont understan anything from this video :/

some help?

[masampouka]

oooh ok

thnx a lot man

cheers

[SuzakuoftheSouth]

That's what the TV is actually doing, but your eyes aren't fast enough to catch it.

[kikodude310]

Humans see at 10fps, not 30.

[eldiablo9604]

wow, ui always thought it was 30.... so it makes barely any if not no difference at all if your tv is 50hz or 100hz?

[amayami]

@kikodude310 Humans do *not* see at "10 FPS". Framerates aren't associated with how the eye works. It changes based on the complexity of the image, but you could say the brain is able to record all the information at any given time. As for blank screens, the amount of speed at which most people would be unable to distinguish an instant on LED in a black room is about 1/200th a second.

[Mario59870]

@amayami Exactly. For example, if a human developed the ability to perceive things over a smaller period of time, they would see everything in that period of time, and thus, due to their own mental state, they would likely perceive it more slowly.

[oldirtybrza]

@amayami Framerates are rooted in electrical frequency. One frame is two fields, so 30 frames/s = 60 fields/s. This means 60 fields a second in North America, perfect for 60 Hertz AC. In places like parts of Europe where it's 50 Hertz, with PAL, they use 25 frames per second (50 fields)

[manheap12]

@amayami They eye can start seeing smooth pictures at around 25fps buy this all depends on what type of picture etc it is. But generally it is 25fps.

[ShokaLion]

It's of an old fashioned CRT TV (the big heavy glass type). That's what it's actually doing in slow motion, scanning the picture onto the screen one line at a time from top to bottom. In real term speed it'll do a full sweep of the screen about 50/60 times a second, so your brain tricks you into seeing a complete picture.

[snowman4839]

CRT refresh by filling in each individual pixel by having a little dot scan past each row with different color.

[RuberHammer]

My dog goes apeshit when he sees other dogs on tv, he obviously see them.

[macandgav360]

maybe he just hears them

[DemonicEggplant]

my dog sees other dogs on tv and barks he obvioulsy sees it

[pauljan1988]

It's not dogs you fucking idiot

[astrapilch]

I think they're referring to dogs not being about to see 2D images.....I don't know, I'm not going to look into they're convos.

[Blaster7492]

was

[lululombard]

Whaou we see that to the TV ? Omg

[jienshirkim]

is this happens to all the tv or just normal old television? what about LCD & Plasma? im intrested0-0

[snowman4839]

this happens with CRT TV's and Monitors which are the big heavy ones with a glass display. LCD technology works differently by using electrical signals to allow different color light to pass through each little pixel (dot) on the screen. And I'm not sure how Plasma TV's work.

[sim2lew]

They still do the scanning in much the same way...

[sim2lew]

All SD TVs (not HD however)

[snowman4839]

This is awesomely cool

[jackmanrocks97]

freaky

[1ManArmy786]

is that how tvs work?! WABBABAA I may be mistaken

[DuudeWhatDoesMineSay]

Please do this with LCD and Plasma as well, it would be so awesome

[Brutuzthegtamaster]

They refresh the whole screen at once so it would be the same effect as slowing down a video, I think.

[sim2lew]

No they don't...

[Brutuzthegtamaster]

Each pixel is divided into RBG in an LCD, it refreshes each one individually, whereas a CRT (Like this) uses an Electron Ray to make the picture, which is why it goes like this.

[sim2lew]

a) RGB

b) The effect will be the same. They both refresh in the same pattern.

[Dircshnaider]

Doesn`t really matter does it ?

[sim2lew]

Would look same, only flatter :P

[yakir11114]

i never knew its like that lol

[RapidRiver22]

??? WTF?

[avidmac]

@ elevadon: Virtually everything you said is incorrect, Watcher3223 is spot on (I work in TV)

[tom06Cannes]

WTF, a tv has 50fps...

[elevadon]

some tv's have a refresh rate of 50hz(sometimes 60) to make the footage look smoother,all tv recording are, however, shot at 25 fps.

movies are shot at 29.97 fps.

[Watcher3223]

25 FPS is PAL, which coincides with the 50 Hz refresh.

30 FPS is NTSC, which coincides with the 60 Hz refresh.

Note how the refresh is a multiple of two of the frame rate. Two fields are scanned for one frame, so for 30 FPS in NTSC, the display must scan the screen 60 times in one second. For PAL, the scanning must be done 50 times a second for 25 FPS.

Standard film framerate is 24 FPS.

All numbers are rounded.

[pmgodfrey]

Hey cool. I've never seen that but always imagined what it looked like.

[DoublePenetration0]

I don't know why but i sense irony...

[KattyaMe]

what is the meaning of FPS??

[zattara13]

frames per second

[jslbatman]

feet per second

[alecTHElion]

yeah that's never used though dumb ass, compared to the true unit (and respected in maths and physics) its meters per second, or m/s

that would be f/s anyway nooby.

[graceNface]

its a video game genre: first person shooter

[SkaterOle]

Youre right but not in this case, in this case it means Frames Per Second

[graceNface]

i was only joking :)

[AirsoftSniper727]

feet per second

[gixzo]

Its not feet per second.

[h2cker]

LOL FAilure

FRAMES. NOT FEET

[Zevl12]

HAHAHAHAAHA U MADE ME LAUGH SO MUCH

[BOB1million]

now i understand why it screws when you try and film a tv. thankyou.

[JordyyJiinx]

yeahh , me too :DDD

[danielhunter1]

no problem

[lbluesey]

fuck off

[alecTHElion]

what's wrong with you? mum disown you for being too polite?

[silentplummet]

NTSC horizontal scan rate is around 15 KHz if I remember right. Capturing the vertical scan at 60 Hz is easy... You're going to need a lot better than 10 Kfps to see the truth (a dot scanning horizontally)

[Vlaye]

yes, do it with a CRT and LCD computer Screen .

also plasma tv and LCD in proresive and interlaced

[benihana360]

is this like a fluorescent lamp? it blinks really fast to project a steady image?

[LordAlwinTHC]

how much does a high speed camera cost?

[BlueEyedFiend88]

ALOT

[LordAlwinTHC]

Atleast a thousand?

[BlueEyedFiend88]

well, i think the price ranges from 5.000 to X0.000, but i could be wrong, maybe there are some cheaper models, but 1000 is THE minimum. if anybody knows for sure -please, enlighten us :D

[whatevtube]

A reminder of how little we actually see.

[BlueEyedFiend88]

well said :)

[TheSmartestTaco]

@whatevtube Im sure they could VERY easily sneak subliminals in there.

[Chryslerer1]

OVER NINE THOUSAND! xD

[painfield]

great idea

thx

[jasleil]

That the reason why you see bars of black going down a TV screen in some videos.

[Weirdo10o4]

I wish I'd see that fast

[toughdog6789]

why is it so dark D=

[experimentboy]

each frame is captured at 1/10,000 of a second... not much light can get in the camera during this time

[speeddemon1092]

true, but there are high speed videos where it is pretty damn bright lol

[whatevtube]

It might not be dark, but due to the fact that only a small portion of the image is being shown, the rest of the set appears dark...

Or, perhaps, it is darkened to emphasize the scan.

[bobbymuay]

channel 99

[ephlaxx23]

thats pretty crazy if u think about it

[MmmCouchPotato]

I can't help wonder what you guys were watching

[montymintypie]

Ooooooooh... Purdy.

I dunno why people think it's sideways. Look at the orientation of the people on the screen.

[patf40]

CRT?

[sh1verr]

yes, it's a tube television.

[JPPT1974]

Cool my friend!

[Chick6517]

Hahah! That was definitely a funny video. I still can't stop laughing right now. It's amazing what kind of videos you find on you tube....

[ferfontes]

fuck you, you're a robot!

[yourafatboyshadow]

wtf?

[kubomon17]

that was cool!

[TomPField]

Nice. Try doing that on an interlaced scan Televisual set, that would be awesome.

[ultraslo]

This is an interlaced TV. We also reposted this one with a faster play back.

[oxcar162]

an lcd would be cool,

btw, the gren line refreshing are electrons thrown by tubes in the tv that react with the materials in the screen just to make a color

[flyingace15]

holy crap

so a tv flickering like 100 times a second really looks like the matrix?

[georgebushisawesome]

shit you are right, I had not thought about that until just now

they turned it horizontal for the movie effect, but basically it's a great referential treatment

good catch!

[heavymetalfreek]

dude now u should do an hdtv cuzz it has a progressive scan refresh rate goin from left to right er sumthin like that ? lol

[DavidMKartsonis]

Progressive only means that it's not interlaced, so it doesn't skip every other horizontal line of pixels.

[moooooooooooooooog]

This is a progressive scan refresh rate going from left to right.

A HDTV usually does not use a CRT tube so it does not work like this

Try using a microscope or spray a tiny amount of water and you can see the pixels on your computer monitor.

[heavymetalfreek]

i no it doesnt use a crt i thought mayb u could see the pixels refresh n the same manner

[desiredusername]

I think this might be the awesomest ultraslo so far. That was amazing.

[kayjames888]

Ultraslo, get companies to sponsor your show through advertising products in action (i.e. BlendTec) showing how they react/work in different scenarios.

[rRobitt]

What do you mean "refresh?"

[DunderMifflinpeople]

only on epixel lights up every time you watch TV.

[cshcrazy]

Refresh in this case means "changing"

So there 24 changes in an image each second

[jchang911]

so this is just a tv screen? :O gasp

[tchanabc]

NICE

[JFMatador]

this is very creepy

[toysvideo]

A CRT monitor displays progressive video but TV screen is interlaced.

Will be different with interlaced tv screen ?

[ultraslo]

All CRT's scan the way you see on this clip. The reason that we have an interlaced picture has to do with the scan rates and the persistance of vision. they first scan or laydown the picture on line 1 then skip and do all odd lines then come back and lay the picture on the even lines. Video cameras with tubes (old Cameras) and yhe early CCD cameras also shot that way. It is a new world now with LCD and CMOS chips. more latter.

Enjoy

[toughdog6789]

hey, yea, canned replys arent cool

[ultraslo]

Sorry there where two of the same questions so I pasted the same one into the second to make sure that the answer arived.

[tecguySD]

Wicked!

[frondew]

Wait, what? Can someone explain to me what this is?

[ultraslo]

All CRT's scan the way you see on this clip. The reason that we have an interlaced picture has to do with the scan rates and the persistance of vision. they first scan or laydown the picture on line 1 then skip and do all odd lines then come back and lay the picture on the even lines. Video cameras with tubes (old Cameras) and yhe early CCD cameras also shot that way. It is a new world now with LCD and CMOS chips. more latter.

Enjoy

[katakotia]

Watch closely what you see in the thin line.

The TV is constantly scanning that line downwards to display an image, and UltraSlo captured what seems to be a human male in jeans standing on the left side of the screen. Note that this happens so incredibly fast, this is the ONLY way you can see it.

[katakotia]

On a second look it is an anchorwoman, you can sort of see mountain geography on the right.

[vivtin]

so basically that creates a full image for us because it goes so fast, around 60 times every second

[zaghy2zy]

cool!! now I know how the screen's refresh is.... awesome

[FlameProductionz]

Lol! How do you make your tv do that! Kinda a piece of crap tv

[megagamer44]

any crt (old kind ) tvs do that thats how the picture gets up there

[meamjustme]

just an normal CRT monitor...

[minijimi]

very interesting. Always wanted to see what a screen refresh looked like,.

[SynthRay]

I don't get it....

[simplexalarms]

what's to get about it?

[crazymonkey186]

not ur best but still cool!!

[Kalywonkas]

Awesome video! Its odd how dark the image seems.

[FrederikP1et]

Thats because it's in slow motion.. =)

[Sk8Kookies]

Can we see the real video, not in slow motion?

[Blasedragon24]

thats what this channel is dedicated to, slo mo stuff.

[CrazyNinjaMike]

i want this too. the real video, not in slow motion

[jackinproductions2]

Actually nice video that was pretty cool!

[AgilityAddict56]

sooooo cool!

[08CJ09]

i love how arguments crop up on random videos, haha videos that there is nothing to possiably argu eabout but...people manage it :]

[prahanormal]

That's actually really awesome.

[DalleKanelius]

is that interlacing?

[firebreathingape]

Its Porn...rofl joke