Video Definition and 724 Threads

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode ray tube (CRT) systems which were later replaced by flat panel displays of several types.
Video systems vary in display resolution, aspect ratio, refresh rate, color capabilities and other qualities. Analog and digital variants exist and can be carried on a variety of media, including radio broadcast, magnetic tape, optical discs, computer files, and network streaming.

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  1. E

    B I would like to get a feedback on this video

    This is a video on Quantum Mechanics that aims to familiarize people with general interests in physics, with some of the main ideas in quantum mechanics. can I get feedbacks on it, I don't have any subscribers at all, and I'd like feedbacks to know how the video could be evaluated. So that's...
  2. N

    Books for the theoretical minimum video courses

    Hi, everyone. I'm currently taking a gap year, and my plan is to study physics, probably for the rest of my life (With that I mean, reading and learning physics for the rest of my life ;-) ) But I thought why not start now? I kind of have fallen in love with the lectures held by Leonard...
  3. F

    Video about pressure in kinetic theory

    Hi, I am looking for a video helping intuition on pressure, in the context of kinetic theory of gases. I remember seeing a video where someone poured a bucketful of little hard balls (lead sinkers for fishing?) onto an electronic scales (a dynamometer, really) showing that this corresponds to...
  4. F

    Video Camera Connection to PC -- How to get the fastest frame rate transfer?

    Hello, What is the fastest connection method (i.e. type of cabling) to transfer images from a video camera to a computer, i.e. what type of connection gives the highest frame per minutes? Is a USB connection fast? If not, why not? Should I look at a camera that connects in a different way...
  5. F

    Camera allows video streaming but no recording

    Hello, I am looking at an IR camera that can be connected to a PC. The camera can store pictures and can only do video streaming but no video recording...What is the difference? Does it mean that we can view what is going on the camera screen also on the computer screen but not record it as a...
  6. P

    Medical Is it possible to improve your reflexes by playing video games?

    And hand eye coordination by playing first person shooters videogames like halo or cod?
  7. W

    So just how random can a fault to ground be....demo video

    I used to have a bunch of these on - ahem VHS,,, This was one that I think shows - all bets are off on trying to predict ground fault current... Even the firemen, keeping their distance (not enough IMO), are almost fooled as the arc stops around 1:42.. nope.
  8. Newtonfalls

    B Detecting Smartphone Waves Using Toy - VIDEO

    Hi, i came across this video on BBC yesterday: <link to video deleted> Now I wonder how this stuff works in detail? Is it the carrier wave or the multiplexer signal of the phone? best regards
  9. R

    B Before the big bang video series

    I discovered this interesting series of videos that others might appreciate. Includes interviews with Alan Guth, Roger Penrose and loads of other interesting people. Definitely not pop-sci and fairly up to date. Episode 1 is a bit low quality with unnecessary subtitles, but it gets better as it...
  10. J

    I Video that show how a linear accelerator was built in 1967

    Hi folks, I have just found a video on youtube that shows how a 2 mile linear accelerator was built in 1967, I share it with you, hopefully you will enjoy it as much as I did:
  11. M

    How to convert .m4v video to .png?

    Hi PF! I have a .m4v video file that I want to convert frame-by-frame to .png files. Does anyone recommend software to do this? I'm using a Macintosh. Thanks so much! Josh
  12. I

    I Understanding the Chain Rule in Derivatives: An Analysis of MIT Lecture Video

    While solving an equation, the lecturer was using substitution in this video: x=au was subbed in for Psi at timestamp 39:27 d/dx = (1/a)(d/du). I get that. But then the second derivative is stated as being d2/dx2 = (1/a2)(d2/du2) How is it (1/a2) if we do not know if there is an "a" in the...
  13. Joa Boaz

    Problem in Great Courses Video On Physics

    [ mod note: moved from general physics so homework template is missing ] At the end of each lesson, the lecturer gives a problem. The question is: A rectangular, flat-bottomed rowboat has a mass of 120 kg when empty. It's 3 meters long, 1 meter wide, and 0.24 meters deep. How many 85 kg people...
  14. D

    Schools Online schools with video lectures & no group work?

    I'm looking for an online American college for a bachelor's degree, with video lectures, and no group work. What are my options? I have difficulty with reading. This kind of a college would work best for me.
  15. Garlic

    I Youtube video about the sound of a pulsar

    Hello PF, I found this youtube video about the sound of a pulsar, and I have been wondering if this sound is really the radio signals of a pulsar converted into sound, or something fake. Thank you Link:
  16. brainbaby

    Generation of video signal by photoconductive effect....

    The thing which I am not getting is the role of scanning in generation of video signal by photoconductive way...the optical image is focused over the photoconductive material ...which decrease the resistance of the material according to the brightness of the scene being casted over the...
  17. mister mishka

    How to delay (and control) a composite video signal?

    Hey, I want to set my own delays to a composite video signal, for use of live video feedback effects (for visuals / art purposes). I am no electrician, but this can't be hard to do right? After searching a few hours online, I haven't come up with any device that I can buy which will do this. Is...
  18. R

    Video lectures for differential equations 2

    I took differential equation 2 last semester and the book we used wasn't so great at explaining a lot of things. I was wondering if anyone knew of a video lecture series that parallels my book (Differential Equations 4th Ed. by Blanchard, Devaney, and Hall). Specifically I am having trouble with...
  19. G

    I Questions about Vsauce's Banach-Tarski video

    Hi, I have some questions about the video about the Banach-Tarski Paradox from the YouTube channel Vsauce: 10:09: Is this really a valid way of constructing the hyperwebster? In this order, one will never get past sequences of only "A". Shouldn't one follow an order like A, ... ,Z, AA, ... ...
  20. Alpharup

    Studying Is it useful to learn advanced math course by video lectur?

    Pure math books, in my experience are very hard to read(compared to engineering). An engineering book(in my experience) keeps repeating the same math(high school calculus+some engineering math) again and again. So, after time, the pattern of thinking become more normal. But math books on other...
  21. Israel Eydelson

    How do we simulate time flow in video games? EE/PHYS

    Hi Everyone, I am very ignorant and uneducated but I have a few questions about a difficult thought experiment. 'How does time flow in a video game/simulation or even in our imagination in relativistic terms?' Let's say a processor operating at 4.2 Ghz, 42 billion instructions per second at...
  22. Newtonfalls

    Make Water Behave Like In Space -- Video

    Hi, just came across a video on CNN showing how to make water behave like it would in space: <link to video deleted> My question about that video is: what height do i need to get a free fall time of 10 sec? best regards
  23. B

    I Awesome cloud chamber track (video)

    I recorded an amazing cloud chamber track tonight. It came from the direction of the sun, seemed like the angle was off slightly though. I was at 1200ft above sea level and it was 6 pm. I will attach a picture of my setup and a video that is typical and then the video with the awesome track. It...
  24. kq6up

    I Help With Black Board EQ's in a P.A.M. Dirac Lecture

    My professor assigned us to watch the Dirac videos on Youtube: The video is extremely poor quality. Dirac does speak the equations as he is writing them, so I have been able to catch many of them. I am wondering if a team effort at trying to decipher these would be a worthy effort for all...
  25. Kamal Reddy

    Physics Making the Switch: Monetizing Physics Knowledge as a Programmer

    Hi everyone, I am a programmer. Been doing web development post my Bachelors. Physics was my favourite while growing up and even during my bachelor days. I want to return to it. How can I give up my programming career and make some bucks with Physics. I have been thinking of a couple of ways...
  26. hypermental

    Shooting Video on Planet Z Near a Black Hole

    [Mentor's note: The thread title has been edited to change the level from "A" to the more appropriate "B"] Suppose there is planet Z revolving around black hole. Astronaut from Earth go in that Planet Z and start video recording and make a DVD . Suppose they played that DVD in the computer in...
  27. Spinnor

    B Video ATLASGAL image plane of Milky Way

    Close look at the ATLASGAL image of the plane of the Milky Way, Video, available in ultra HD at, http://www.eso.org/public/videos/eso1606a/ Also, Comparison of the central part of the Milky Way at different wavelengths (annotated). Up to 228MB in size, here...
  28. A

    Instructions for Video Analysis Projects

    Hi all, I'm going to have my students (algebra-based mechanics at a community college) do a video analysis project and I'm wondering if anyone knows of any resources for good sets of instructions for this type of project. I'd like something pretty open-ended so students can choose their...
  29. ujjwal3097

    Video editing software for presentations

    Can anyone tell me which video editing software is used in this video. I am doing some project and i need to show the presentation but i really liked what this video has in the background. Can anyone tell me about this software or another similar software for editing. video:
  30. gracy

    Question based on a video (battery and voltage)

    in all three cases there is no battery or voltage source,right?Because I can't see any battery.But there is voltage ,then without battery how is potential difference created?I think potential difference is generated due to charged capacitors not by battery or any other voltage source.
  31. bcrowell

    Old video showing superfluid helium

    I thought this was pretty cool: www.youtube.com/watch?v=sKOlfR5OcB4 You can skip about the first 2 minutes, which are just the credits and some footage of them transferring some fluid. Nice concrete demonstration of various fun stuff such as superfluidity and second sound.
  32. AdrienJ

    [Video] Carbon nanotubes & single photons

    Hi, I'm currently doing a PhD about how to use carbon nanotubes as an efficient single photon source. On my spare time I've done a short video to explain it to my familly and friends. I thought you might be interested, so here it is :
  33. Tony Stark

    What are the top tools for creating animated videos on profiles?

    Which are the most common tools that can be used to create such videos ?
  34. dkotschessaa

    What is the Math TV playlist and how can I access it?

    So I was on this site called pluto.tv (which is pretty cool but) I was disappointed that they had no "math channel." I even tried to get them to create one, and they looked into it, but no. So I made one. Sort of. So here's what you do. Go here...
  35. kelvin490

    Problem of plotting picture and video in Linux HPC

    I have a Matlab program that reads data file and then create avi. files and tiff pictures. It runs without problem in window OS using R2014a but cannot run in a Linux high performance computer(HPC). When the Matlab in Linux is started there are two warnings: Warning: No display specified. You...
  36. bwilson4web

    Calculating HP from speedometer video

    Recently, Toyota held a 'press drive' day for their 2016 Prius and Jason of Jalopnick had the good sense to make a video of the speedometer during a maximum acceleration. I downloaded the video and coded the timestamps of each speed change to generate this curve: This confirmed the 0-60 is...
  37. bcrowell

    Video of guitar strings from inside guitar

    Several of my students have pointed me to this video: http://bit.ly/1N1IGR8 Apparently the guy put his cell phone inside his guitar and took a video. My initial reaction was that it looked fake, because the time scale of the movement of his thumb seemed mismatched to the time scale of the motion...
  38. D

    Book or free video course on alternator design

    Hi All, Does anyone perhaps now of a book or free video course on alternator design, Like where I can learn about how to design alternators? Sorry if I posted the question in the wrong "apartment" of the site. Thanks Dilan
  39. U

    Physics Astrophysicist turned video game programmer?

    Hi all, I'm at a bit of a crossroads - I'm in a direct PhD program (in Astrophysics) right now, with the option of walking away with my Master's in September. In all of my research projects I've focused heavily on simulations (I know Python and Fortran, but not anything from the C family...
  40. collinsmark

    What Are the Best One-Handed, Minimal-Residue Foods for Gaming?

    Fallout 4 launch is just around the corner. Since I probably won't be leaving the house for a month or so after that, I should stock up on supplies. Preferred food should be keyboard and mouse friendly: food that can be eaten with one hand, without utensils. I already have some stock of pizza...
  41. kelvin490

    MATLAB MATLAB enlarge 3D plot without enlarging colorbar

    Is it possible to enlarge a 3D patch without altering the size of the colorbar? My original picture is like this one: https://www.dropbox.com/s/xashny3w1fwcb2f/small.jpg?dl=0 I just want to enlarge the block in the middle of the figure keeping the colorbar unchanged. I used zoom(1.9) before...
  42. kelvin490

    MATLAB MATLAB movie2avi cannot made video

    I am trying to test the function movie2avi using simple codes in R2014a as follows: clear; close all; figure; Z = peaks; surf(Z); axis tight manual; ax = gca; ax.NextPlot = 'replaceChildren'; loops = 40; F(loops) = struct('cdata',[],'colormap',[]); for j = 1:loops X =...
  43. D

    Why Is There a Black Line Moving Across the Screen?

    from a bit of googling, i realize it's because the frame rate of the camera and the projector are different. however, i have tried recording videos with cameras of 60fps, 30fps and 15fps, and the projector is likely 60 fps. That's why I'm curious about this - which frame rate is faster (the...
  44. B

    Video Image Processing: Algorithms for Motion Detection

    Is there a computer algorithm that can determine if a person it moving their right arm or there feet, or if they are running or not ?
  45. T

    Any video player that shows time in fractions of a second?

    Hi Thanks for the help
  46. W

    FFVII Cloud's Buster Sword Busted in Ludicrous Video

    So, I opted not to post this in Science Fiction and get my thread locked~ I watched this video and it seemed quite ludicrous to me. The man in the video measured sword speed (which I assumed was angular velocity) with mph. He then continued to say that linear momentum applies when swinging...
  47. B

    NSF Video Lectures from 1950s - Where to Find?

    Does anyone know where I can find video lectures similar to in that they are from the 1950's?
  48. BiGyElLoWhAt

    Excellent video series raises good question:

    www.youtube.com/watch?v=oW4jM0smS_E That's the video I'm referencing in particular, but 1 and 3 are necessary prereqs if you're new to the matter (as I am). He goes through and derives the product rule and power rule for polynomials using algebra. My question is this: why don't we teach...
  49. RyanH42

    Geometry Vector Functions Searching Video Lecture

    Hi I am studying Differantial Geometry.My textbook is Lipschultz Differantia Geometry and I am in chapter two.I undersand the basic idea of Vector function but I wanI to gain more information.Is there any video lectures about vector functions.I found this...
  50. Jimster41

    From black holes to superconductors: Stanford video

    Hope this Link works. I thought this guy was great, for the layperson looking for more than the usual fluff. Might nice to give SITP some heavy "likes". Maybe they will do more. Sorry not sure what forum this was most appropriate for...
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