What is Video: Definition and 722 Discussions

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. T

    Science Education Video Series: Think About

    Hello Physics Forums: I wanted to share a new science-education video series called 'Think About'. We just completed the first eight mini-episodes. 'Think About' airs on American Forces Network (AFN) and the audience is pretty special: kids that are overseas with their military parents. The...
  2. M

    Relative velocity video (review and rate)

    Hey Guys I am making a series of physics tutorials.. with an aim to solve problems and understand concepts without making using of any formulae by making use of animations and some real life examples I started with conceps of relative velocity.. Please tell me if its useful.. I am sorry...
  3. A

    Introduction to digital logic design Video Lectures

    Hi, Can anybody recommend me a good video lecture series on Introduction to digital logic design? I want to watch these videos before going to class.
  4. S

    Finding Quality Video Lectures: Feynman and Beyond

    if possible could you tag some good video lectures may be feymann or any other good source..thanks...!
  5. B

    How are multiple video outputs displayed on various sections of the TV screen?

    CRT televisions use electron guns to fire electrons at color phosphors on the screen which emit the light of varying frequencies to produce an image. They can scan row by row or column by column depending on the standard of the broadcasting signal though modern models have circuitry that can...
  6. DHF

    Upgrading Video Cards: Best GPU for AMD-FX4100 & ASUS M5A99X EVO

    Greetings, I am currently building a new system and I am trying to get the most bang for my buck. my concern is over the video card currently. I have two in mind but I don’t want to pay for something that I won't get the full performance out of. Both cards are Asus, the first is the GeForce GT...
  7. C

    MHB Demonstration Video: Handwriting recognition for maths

    Hi, This will be the last time I bother you with this for a little while. I have produced a rather amateur video (4min) of what I think handwriting recognition for maths should look like. For the time being, I have named it MathPen. http://users.ecs.soton.ac.uk/cmml100/VIDEO0012.mp4 What I...
  8. G

    Placing a video of a collision b/t the Milky Way and Andromeda Galaxy into a PPT

    Homework Statement We are not allowed to use any videos from youtube. They have to be a realiable source. We are having difficulty copying the embeded link to the power point presentation. Homework Equations The Attempt at a Solution First, we right click on the video to copy it...
  9. S

    Dynamic Soaring of Air masses Video

    http://www.icarusengineering.com/Dynamic-Soaring-and-SE.htm I am trying to validate dynamic soaring versus normal thermal soaring, but both are using thermals as the power source. Dynamic soaring would mean using 2 types of air masses. One in the thermal and the second one is the inflow to...
  10. M

    Transmitting video via radio wave from weather balloon

    My friend and I had an idea to put camera on the weather balloon and we wanted to have like a live picture from camera. But because we don't know so much about electronics we don't know how to do it. Fe figured out that we can do it via radio waves, maybe there is some more efficient way. That...
  11. B

    How do video games allow you to take different paths each time you play?

    Does a chess program game knows every move that you can make? Does that mean that every possible outcome exists in the chess game and it just creates a path everytime you play by saving that path? Does this apply to more complex games with open worlds? So would it be correct to say the second...
  12. J

    How accurate is this video about higher dimensions?

    I thought it was pretty straightforward until 4:26, until they started making some questionable claims. I'm no expert so I thought I'd ask here. http://www.youtube.com/watch?v=0ca4miMMaCE
  13. davenn

    Notching 1407kHz out of a composite video signal

    hi gang, got a friend who lifes relatively close to a 1407kHz (multi kW) AM broadcast transmitter he has a ~ 50metre run of 75 Ohm coax between a security camera and the recording/viewing equip. The 1407 kHz is getting into the system and causing the usual herringbone pattern on the displayed...
  14. V

    Program that accelerates video play speed and keeps audio at normal pitch

    I've been interested in this function Youtube offers on videos ever since I first used it a few months ago. It's amazing. Some videos are just way too long. The speakers will have something very informative to say, but they'll just ramble and/or speak very slowly. For some reason, Youtube only...
  15. J

    Best solid state physics video course

    Hi, What is the best solid state physics video course available online. So far the best one i have found is this one .. but it is just introduction to Solid State Physics
  16. E

    MATLAB Video capture from digital data using MATLAB

    I am working on one project. In which I have CCD image sensor (Sony's ICX254AL ) and its output is connected to Analog Front End (TI's VSP2562). The output of Analog Front End (AFE) is 12 Bit Digital data at the rate of 9 MHz. I am thinking to use NI's PCIe 6535 as a data acquisition device to...
  17. P

    Converting real life dimensions of a canvas into video file dimensions.

    Hey people, 1. The problem statement, I'm doing a Uni Art assignment, and I'm going to be projecting a video onto a canvas (which I don't know the exact dimensions of yet). Video file dimensions are stated as 1080 x 980 and so forth, whereas the real life canvas will be something like 50...
  18. marcus

    T'Hooft video talk: Conformal Gravity - BH complementarity

    t'Hooft video talk: Conformal Gravity -- BH complementarity http://pirsa.org/12050061 Conformal Gravity and Black Hole Complementarity Speaker(s): Gerard t'Hooft Date: 11/05/2012 - 4:40 pm Collection: Conformal Nature of the Universe Definitely worth watching at least some if not all of...
  19. P

    How accurate is this video? Double Slit experiment

    Today, my teacher showed us a video in class (AP physics B) as part of our quantum physics unit. I'm really skeptical about the video, and I wanted to seek the opinion of people who are actually knowledgeable in this field. Is there anything wrong with the information provided...
  20. Spinnor

    Slow mo walking chicken video, watch the head movement.

    The video, http://www.youtube.com/watch?v=XDCk0DaNwiQ&feature=results_video&playnext=1&list=PL28AFB6F1D7079B62 Observation of our chickens, when a chicken walks the head is kept motionless and then moves quickly to a new position, repeating over and over again as the chicken moves forward...
  21. T

    How does the wind organ in this youtube video work?

    http://www.youtube.com/watch?v=AuYFcjBmMJ0&feature=relmfu at time 34:35. He says it depends on how fast the air is flowing by? So does that mean the velocity of sound in the equation f=nv/2L change? How are the different sounds produced?
  22. marcus

    Rovelli's talk at Perimeter 4/4/12: video online, comment?

    http://pirsa.org/12040059 Fine presentation today, room packed, good questions from audience (esp. from Turok but also from others.) Rovelli will spend several weeks at Perimeter during which time he also makes a side trip to Princeton Institute for Advanced Study to give a slightly different...
  23. P

    What is the interesting video I came across showing?

    I recently came across an interesting video. What do you think it might be? http://www.youtube.com/watch?v=Ypqfq0SYrAQ&feature=player_embedded
  24. QuarkCharmer

    Is there a good linear algebra video series (Besides MIT)?

    I just can't watch Prof. Gilbert Strang on MIT. His stuttering and slow pace is just too much for me. Is there another series on the typical first course in Linear Algebra available in video form that I can casually watch as a companion to my textbook and lecture?
  25. M

    Struggling in Dynamics Class? Learn from MIT's Expert Videos and Ace Your Exams!

    OK shot in the dark here but here is my question prefaced with a small back-story. Im a undergrad in mechanical engineering program. I am currently having a bit of trouble in Dynamics class. A lot of people who are much smarter than me say its nothing more than applied physics. Like some guys...
  26. rhody

    Cool Video, human powered flight, first video

    I confess, I stole this from garrett's twitter page, enjoy... Quoting the pilot's caption at the end: "and suddenly you are free, a really intense feeling of freedom. The true feeling of flying, a magical moment. The best feeling I have ever felt in my life" Rhody... :biggrin: :devil:
  27. D

    EM Experiment Video: Seeking Details of High-Energy Experiments

    All: This is a weird question. I'm trying to find a video or TV program, I'm hoping someone else saw this and can tell me what it was. There was a mouse or frog in a box or cylinder. They were experimenting with EM fields, very high energy and they were shaping the fields. I think this...
  28. rhody

    Can Video Editing Create an Entire World? A Look at BranitVFX's World Builder

    I give you... World Builder, by BranitVFX, sit back and enjoy... amazing editing, two years worth. Rhody...
  29. D

    The expansion of the universe art video

    Hey! I'm a filmmaker and just thought I'd post my video I made that is inspired by physics and the beauty of the universe. http://vimeo.com/36267608
  30. M

    Is Video Correct? What's Your Opinion?

    What do you think?
  31. B

    Digital video image stacking

    Hi folks, its been a while since I've visited. I had an idea a few years ago I never pursued and I thought I'd run it past this group simply because not only is it beyond my education to develop but its combining both optical physics and some techniques used in cosmology. OK so here goes I...
  32. fluidistic

    Fun Game: Watch the Video and Play!

    I think the video is clear enough: http://www.youtube.com/watch?feature=player_embedded&v=qHrBhgwq__Q. Looks like a nice game.
  33. D

    ELO chess ranking system applied incorrectly in video games

    Are there any chess players, statisticians, or smart people who are familiar with the ELO ranking system? This concerns a game with at least over 100,000 players, so its not an obscure concern. Basically, I play an online video game that tries to apply an ELO ranking system to rank...
  34. QuarkCharmer

    Looking for Entertaining Physics II Video Series - Any Recommendations?

    I found it very entertaining last semester watching Walter Lewin lecture on Physics I topics whilst taking the course and reading my textbook. I'd sad to see that he doesn't have a video set for physics II topics! (waves, electrostatics, et al.) Does anyone know of a similar style video...
  35. C

    Video Games and Their Basis in Theory

    Are there any theories with which the mass effect fields of Mass Effect and the slipstream space of Halo draw inspiration from? Is there any scientific basis for either, or is it complete fantasy?
  36. O

    Fukushima What are these streaks in this Fukushima endoscope video

    Here's the video. http://www.youtube.com/watch?v=w_iP3ZrIb88 What are those streaks running across the video? I don't mean the specks (which they say is caused by radiation damage to the video) , but the streaks that seem to have a direction. Sometimes they come towards the camera...
  37. V

    Replacing Monitors - Cannot display video mode

    Replacing Monitors - "Cannot display video mode" I'm switching out my old CRT Compaq FS7600 monitor (for specifications: see the link below) for a dell flat screen monitor. Unfortunately, this monitor says nothing about the model type, and I don't have the box as I got this from a friend. The...
  38. C

    Help understanding MIT Open Course Ware Video Content

    In the below video from approx. 12:00 onwards while explaining the proof for Quotient Rule, Mr. Miller says that while delta x approaches zero, delta v approaches zero. Can someone explain me why is that? Thanks a lot!
  39. T

    Prove a video clip was recorded in continuous-time

    I am looking for an answer based on Logic and not necessarily a technical one. Suppose, if I have a video clip of me doing something (let's call it event 2: E2) and would like to convincingly prove to others that it happened after a certain date - say, 2011-01-01. One rather simplistic idea...
  40. C

    Calculating sling projectile speed from video.

    https://www.youtube.com/watch?v=6IQ15ymhR2M This clip from the history channel as is titled, attempts to address the likelihood of David killing Goliath with a sling. As you can see in the video, the pro Slinger when testing the force on a load cell, got a reading of 3.62 kN or 3620 N...
  41. J

    New Video on One trillion frames per second camera

    New Video on "One trillion frames per second camera" Here is the video: Mods, please delete if there is already a thread for this. I think this is a great achievement by the researchers. It's an interesting topic, so maybe people can use it to ask questions on how/why it works, and...
  42. T

    Video Monitor jack repair, Power and signal

    Video Monitor Jack repair I have a Fahrenheit 7” LCD Wide Color Vision monitor that has a broken jack. From the monitor is only this female connector: Then there is a cable that goes from 8 pins to 24 pins (I count 12 on each half?): Next after that cable is the box, where the...
  43. rhody

    Medical Quyen Nguyen: Color-coded surgery TED Video

    Color-coded surgery TED Video Tumor and Nerve staining is very cool, hats off to Dr. Roger Tsien (who shared Nobel Prize winner in Chemistry 2008) for creating the breakthrough green fluorescent protein which is the basis for the Tumor and Nerve staining technology. If this technology had...
  44. B

    Stargazing Eclipse of the Moon from Sydney, Australia 10 Dec 2011 video

    G'dday My name's Barry. I live in Sydney Australia. We got a reasonably good view of the eclipse of the moon last night. Was cloudy to start with, but cleared up later when the full eclipse happened. The event began about 11.45PM and ended about 2.45AM, so we were in a good position to...
  45. C

    NASA NASA CME Video Captures Object Hiding Behind Mercury

    Ok fellas, what is it? http://gizmodo.com/5865808/has-nasas-satellite-captured-an-unidentified-object-near-mercury/
  46. E

    New animated video on Electricity and Magnetism

    I have just created a short animated video explaining all the concepts of electromagnetism. It is at: http://youtu.be/XiHVe8U5PhU I put a lot of of time and effort into making the animations, so please take a look at this, and please pass it along to anyone who you think might be...
  47. E

    New animated video explaining Special and General Relativity.

    Hi Everyone. I have just created an animated video on Special and General Relativity, explaining how all the conclusions are derived from the fact that light has the same speed for all observers. It is at: http://youtu.be/ev9zrt__lec I put a lot of effort into making the animations, so...
  48. S

    Video Lectures for Upper-Level Mathematics

    Hello all, I am looking for video lectures for upper-level mathematics courses. In general, late-Undergraduate and early-Graduate courses of any kind. If you post in this thread, please do not link videos for Calculus I, II, or III, or first courses in Linear Algebra, ODEs, Complex Variables...
  49. L

    Transmitting video from underwater

    hi. I am looking into buying/making a wireless video camera to attach to a radio controlled submarine. I am familiar with the 2.4g cctv type spycams and digital video receivers but am told water is an insulator to the fm signal being transmitted. I am also aware of the rc 12 wireless mini cam...
  50. DaveC426913

    Dancing Cloud Phenomenon on YouTube - Bad Astronomy

    Caught this on Youtube. At first I thought it was a camera aberration, such as a drop of water on the lens. But the effect is independent of camera movement. Anyone know what's going on here? Is this effect something between camera and cloud, or is it really something up at the cloud level? If...
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