Video Definition and 724 Threads

I'm an old man. I cut my teeth on *pew pew* games in the video arcades of bowling alleys. I burned out my video game organ decades ago. The only carryover was games like Myst and SimCity and some of those Discover new lands type games. I like construction games rather than competitive or battle...

I have a cctv camera that is defective that only gives violet image. I think the IR filter mechanism is broken and it is out of warrantee. I'd like to know how poorer can you resolve details using monochrome than using color. So I can decide whether to replace it (won't if the details are the...

Hi friends, I'm just thinking, in some video games, the characters have a double jump mechanical. What's the physics concepts behind this? I mean, it's really possible explain it? I saw a brazilian video about science in games in which the author talks about air resistance. It's a curious...

This is an interesting video where a shipwright shows how to modify a new Ryobi electric hand planer to correct some of its defects.

Ben Eater's cool site has a couple of videos using Grant Sanderson's (3blue1brown youtuber) quaternion videos and making them interactive. WHile the discussion is going on you can manipulate the content. https://eater.net/quaternions/

When the PF Photo contest went on a brief hiatus a month ago due to my Alaskan Cruise, I posted a few photos during the trip. In case there was some interest in it, I've edited a couple of videos of that vacation. The first one is my salute to the beauty of Alaska's Inside Passage. It truly was...

I have started going through the Quantum Mechanics 8.04x and 8.05x from MIT in edx by prof. Barton Zwiebach. I am enjoying them. 8.04x 1. https://courses.edx.org/courses/course-v1:MITx+8.04.1x+3T2017/course/ 2. https://courses.edx.org/courses/course-v1:MITx+8.04.2x+3T2017/course/ 3...

On p. 566 (Section 563) of Hamilton's Lectures on Quaternions, I find "Operating with phi, and making reductions analogous to those of recent articles..." The 2nd derivation, beginning with "phi rho prime" so far totally eludes me. Let me apologize if this is the wrong forum. Quaternions have...

Found this great video on magnons as an alternative to electrons for circuit design.

Hello everyone, Does anyone know if it is possible to convert a mp4 video clip to raw video? Or once the video is in mp4 format or any other format there is no way to go back to raw? Do certain cameras allows to shoot the video so that both types of files can be saved at the same time? Thank you!

Domain of Science reviews science in sci fi movies: The reviewer talks about how physics is misused in movies and cringes at some of the funny movie moments where they got physics wrong.

Specifically this one: I've been asking several question's about the weak force to my professors, and both on here and PhysicsSE and it seems impossible to get a consistent answer as to what weak hypercharge, weak isospin actually are with any degree of physical-ity. So I suppose this thread...

I have a very very unusual project requirement where I need a pocket video projection with the lowest possible projection angle or "longest possible throw-ratio". It's a pocket DLP projector so goal is to have the beam remain ,as much as possible, almost the same size as the DLP matrix, for a...

The question here is not asking for links to help understand analytic continuation or the Riemann hypothesis, but rather help in understand the bits of hand-waving in the following video’s explanations : https://www.youtube.com/watch?v=sD0NjbwqlYw (apparently narrated by the same person who does...

A bit of unsual scenario, I need to divide a video projection beam horizontally into two. Since the splitted beams in my diagram are treated as a separate beam they have to have their focus plane changed. Is that possible to do and how would one do it? http://image.ibb.co/jAu9x7/9241421.jpg If...

Hello. I self-studied and have a good grasp on QM, statistical mechanics and Group theory. Next step is QFT. There are several sets of video lectures on Youtube about this subject and I am asking for a recommendation (I would like a set of videos which involves the unitary IR of the Poincare...

Hello everyone, I'm taking Mechanics of Materials II this semester which includes Anisotropic Hooke's Law, Plane Stress & Strains, Mohr Circle and so on. I need a video source of these topics. The videos on youtube mostly have bad camera position. I want something like coursera stuff but there...

I found, at least in my uneducated opinion, a very good demonstration of water as a dielectric. I understand that putting water in a bag will change the dielectric constant of the water in it somewhat, but I think the capacitance meter at least makes water's value as a dielectric visually...

MinutePhysics is attempting to produce a series of video lessons on Special Relativity, using an approach, according to the video, that will be different and "simpler" than the traditional method that SR has been taught in schools. Since we often get questions on here about this topic...

Hi I have found a YT video in which there is an object recorded on infra red camera. It makes very strange maneouver. Is there any explanation what this could be? Thank you ( I have edited video so it shows only interesting moment).

In this video clip from an early Bruce Lee movie, Bruce Lee shows his skills with a light nunjakus against a light saber.

I came across this YouTube video describing some of the "science" behind light sabers, and what it would be like to be hit with one. I thought it was worth sharing.

Hello, I have found a YT video which shows some kind of experiment. You see a wooden toothpick suspended on a spider's web single thread and covered by a jar. Then a you see a man who holds a few plastic straws in his hand. He closes them to the toothpick and it slowly moves (which is seen if...

This young student won $250K for explaining Relativity http://www.sciencealert.com/a-high-school-student-just-won-250-000-for-explaining-relativity-using-a-pick-up-truck-and-usain-bolt

This video is obviously fake. http://www.kidzworld.com/users/squidball/videos/491720-bouncing-in-reverse-true-or-fake However, I want to ask the question as to whether someone could do this in real life?

Has anybody seen any neutrino interactions on video on the Internet where you can see the interactions that have taken place in a neutrino detectors? I know that the interactions in most neutrino detectors is spaced out over time (that come from the same location), but it seems to me that over...

Hello, What software or tool is used in this video to present the material this way? Thanks

This video came up in a Private Conversation I was having with @Grands recently. The level of sophistication and precision of this production line is amazing to me. Thinking about all of the design work and experimentation and fabrication work and optimization that went into it... :smile:

What to do if you get distracted by video games every time I have free unlimited wifi and a laptop with me? Advice - thank you.

I want to pursue the sciences but I got no green. So I joined the BreakthroughJuniorChallenge in the hopes of winning! I would appreciate it if someone as knowledgeable as the people on this forum could comment and share my video submission. This is the link: It's also fine if you guys just...

Hey, I just thought I would share some of my video art. They are meant to be visuals going alongside Techno / House music in the nightclubs of Berlin. However I got a lot of ideas from reading up on physics, like diffraction patterns, fractals, polarization of light / materials, lenses, video...

Can you help me figure out how this light-based phenomenon works? Please explain with an intuitive answer using the simplest principles possible. Note how the location and width of the dark horizontal bands is constant with respect to the edge of the video frame. The LED light looks normal...

The video shows some optimisations on the turbofan engine and reaches the conclusion it needs to be about 4m. The premise is that accelerating more air a little is more efficient than accelerating less air to a higher acceleration and speed, fact mentioned in all aerodynamics books, and that...

Hi,I’m looking for online video lectures about principles of GPS but couldn’t find them. Can anybody recommend some?Senmeis

Hi, Some time ago I was looking for lightning ball videos on youtube. I observed some strange phenomenon recorded on one of the videos. Before a lightning ball is created, some "dark" ball is coming from above and then it immediately changes to the lightning ball which is moving at different...

So a few months or years ago I learned that most of the energy from swinging comes from raising the center of mass at the lowest point of a swing. I also recently found a method of swinging that maximizes this energy gain. You squat on the swing, and stand up every time it gets to the lowest...

Hi, I'm trying to make a physics based game to teach my progeny about the universe. My first step will be to show how bodies gravitate around other bodies, and then model a solar system, a galaxy... simple things. I could do it using Newton's laws, but I want to include things like black holes...

I am considering making a small studio space for a video I want to make. It will have to hold a cubic meter of space in which I will have very small fluorescent objects 1 mm cube (see previous thread). Since I am not expecting to have the most flaming hot UV light driving the fluorescence I...

I'm trying to code a script for a character in my game. This will tell the character if the player is in front or behind them. Basically I know the coordinates of the character and their angle of rotation (if rotated 45 deg, that is where they are looking) Perpendicular to their angle is a...

Not sure where the Rocket Science forum is so I'm putting it here. Much of it is split screen from the ground and the rocket.

Homework Statement Hello I have a video that is 30 fps according to the video information (when i right click on the file). It is stated that the videos were filmed in slow motion at 1/10 of normal speed. I'm using a standard version of MATLAB to plot points (actual position) on a moving...

[Mentor's note: YouTube videos are not generally an acceptable reference under the PhysicsForums rules. Many are oversimplified, seriously misleading, or just plain wrong, and no one who is serious about understanding quantum mechanics should be trying to learn from them. We've left this...

Dominic Walliman's video summarizes the various fields of maathematics in a wonderfully short video: http://sploid.gizmodo.com/take-a-quick-tour-of-the-mind-boggling-universe-of-math-1792041367

Homework Statement I would like to know how I calculate mass of a ball based on a video. I can measure the speed of the ball at any point using Coach 3 (computer program). I know g=9.81m/s2 for the rest i don't know anything. I would like to know the way to calculate the mass of the ball in...

Dear PF Forum, Can someone help me with this matter? I want to ask a question in PF concerning a particular video. You'll see that the video popped up in my thread. I use insert link above. But what I want to do is simply, insert the link, so the use can click the video to watch it without...

Had not seen this before. Yeah he is a bit of a showman but I have seen a lot worse.

I have a video to present to my class and for five seconds it goes all blurry. Does anyone know how to sort it out and why it happened?

http://www.dailymail.co.uk/news/peoplesdaily/article-3493639/Four-year-old-boy-miraculously-survives-run-minibus-China.html