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  • Grams to Pounds: A Domino Chain Reaction [Video]

    - by Jason Fitzpatrick
    Most of us have seen a domino knock down or two in our day, but this demonstration video shows how a series of increasingly larger dominoes allow a tiny domino to knock over a 100 pound domino. A domino can knock over another domino about 50% larger than itself. A chain of dominos of increasing size makes a kind of mechanical chain reaction that starts with a tiny push and knocks down an impressively large domino. The only question we have after watching the video is: where can we find 29 appropriately sized dominoes? [via Neatorama] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • Calculating 3D camera positions from a video

    - by Geotarget
    I need to calculate the 3D camera position and rotation for each frame in a given video. This is typically used for motion-tracking, and to insert 3D objects into a video. I'm currently using VideoTrace to calculate this for me, and I'm getting the data exported as a 3DS Maxscript file. However when I try to use the 3D camera rotations, I'm getting strange errors in my 3D calculations, as if there is an error with the 3x3 rotation matrices. Can you spot any error with the data itself? Or is it my other calculations that are erroneous? frame 1 rotation=(matrix3[-0.011938, 0.756018, -0.654442][-0.382040, -0.608284, -0.695727][-0.924068, 0.241718, 0.296091][0, 0, 0]).rotationpart position=[-0.767177, 0.308723, -0.232722] fov=57.352135 frame 2 rotation=(matrix3[-0.460922, -0.726580, -0.509541][-0.200163, 0.644491, -0.737947][ 0.864572, -0.238145, -0.442495][0, 0, 0]).rotationpart position=[-0.856630, 0.198654, -0.243853] fov=57.352135

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  • How To Specify Bitrate, Codec and Demultiplexing for VLC Video Capture or Recording

    - by Subhash
    I capture video from old TV tuner card - Pinnacle PCTV - using VLC. The video is from the Composite input and audio is from I guess the mixer or Line in. The command I use is: vlc v4l2:///dev/video0:normal=pal:width=720:height=576:input=1 :input-slave="alsa://hw:0,0" In VLC, I have enabled the Advanced Controls toolbar, which allows me to record videos when I want to. However, these videos are uncompressed - very big and play only with VLC. Totem throws the "Could not demultiplex stream" error. I need to convert them using WinFF to reduce their size and make them playable with Totem and other software. My question is whether I can configure the recording settings - the codecs and the bitrate, and also get the stream demultiplexed. If I pass any -sout parameter with command I get a "Segmentation fault". I use 64-bit Ubuntu 10.10.

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  • Netflix Rolls Out Polished New iPhone and Android Apps [Video]

    - by Jason Fitzpatrick
    If you’re a Netflix subscriber, you’ve got a brand spanking new mobile interface to take for a spin. Last week Netflix released a brand new iOS interface, this week it’s a brand new Android interface. The above video showcases the new iOS interface for mobile playback on devices like the iPhone and iPad. The slick new layout makes it even easier to browser new content and resume watching content you’ve paused at home or on the go. For a peek at the new (and similar) Android interface, check out the video below: For more information about the respective apps, visit their download pages to read up and grab a copy. Netflix for Android / iOS How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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  • Choppy video in vlc even with hardware acceleration on ATI Radeon HD

    - by l0b0
    After installing Catalyst 11.12 and studying instructions (1, 2) to enable hardware acceleration I ended up with the following command: sudo apt-get install xvba-va-driver libva-glx1 vainfo && \ vainfo && \ vlc --verbose 2 --ffmpeg-hw video.1080p.x264.mkv The output confirms that it's using the VA API: avcodec decoder: Using VA API version 0.32 for hardware decoding. But even after a reboot the video still looks choppy. There's no vlc output to indicate that the codec is having trouble, or that it's skipping frames. Any idea what could be the problem? Using vlc 1.1.12 with default settings. Also tried (in sequence): sudo apt-get install libva-glx1 sudo apt-get install --reinstall libgl1-mesa-glx:i386 libgl1-mesa-glx:amd64 libgl1-mesa-dri:i386 libgl1-mesa-dri:amd64 xserver-xorg-core Rebooting No luck yet. Specs from /proc/cpuinfo : Intel Core i7 CPU 950 @ 3.07GHz

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  • Video crashes with 10.10

    - by John Mahon
    I have installed both the 64bit and 32 bit versions of 10.10 on my Compaq Presario PC. I first installed the 64 bit version of the OS.The video often crashed when switching user. It also went haywire occasionally when I visited some web-sites. I read that there may be some problems with the 64 bit OS. So I installed the 32 bit version on another disk. This version seemed even less well behaved. HP's model number for the computer is SR1838NX. The hardware is listed at http://bizsupport1.austin.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00628274&lang=en&cc=us&contentType=SupportFAQ&prodSeriesId=1841793&prodTypeId=12454&printver=true#A0 I think the important info is that the chip set is "ATI Radeon Xpress 200" and the processor is "Athlon 64 (S) 3700+ 2.2 GHz" Has anyone else had video problems with similar machines? Is there a work around or an update? I have had previous versions of Ubuntu working on this machine and other flavors of Linux as well. Thanks in advance. John

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  • Video player with good subtitle rendering

    - by Oxwivi
    Is there any way to improve the subtitle rendering capabilities of Totem? The subtitles positioning seems to be hard-coded in it and even though the style is user-customizable, it does not confirm to the formatting in subtitle data. In some scenes where writings appear, the subtitles are supposed to appear next to those along with what is being said at that moment. However, on those scenes the translations of text onscreen appears on the default subtitle area with nothing about the things being said. The correct rendering are according to the open-source Windows video player, Media Player Classic - Home Cinema. There are no Linux port as far as I'm aware. If VLC's subtitle support is the same as in Windows, it won't work for me, period. Please suggest anyway to improve subtitle rendering in Totem, other video players, or a way to port MPC-HC.

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  • All video players display black screen.

    - by Dennis
    I'm working in 10.04 Lucid. All my video players (Movie Player and VLC) and the preview windows in editors (OpenShot and Pitivi) will only display a black screen when playing a video. The sound is fine and the videos work fine on other computers. I have tried multiple formats from varying sources .MOV taken from old ffmpeg projects, .AVI straight from a camera, .MP4 using h.264 from OpenShot on another system, .OGV from a gtk-recordmydesktop session on this very computer. I even get a pure black screen in the viewer when starting a remote session in VNC. This box has a GeForce 8400 GS using the Nvidia drivers in case it may be a card problem or setting.

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  • HD Video Peformance Unacceptable

    - by Mike Hasselbeck
    Was wondering if anyone could help me boost HD 1080p video performance on my machine? I've got an AMD Athlon X2 Dual Core processor, 2 gb RAM & an ATI Radeon 5450 video card. I've installed the latest ATI Catalyst drivers, I installed the hardware acceleration things and linked them (I believe) to VLC. Still, it's still not running as well as I would like. Any thoughts or suggestions? Any help would be much appreciated. Thanks!

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  • convert video file to .ogg

    - by Levan
    I've been having trouble with this because I'm new to Linux: I would like to convert different video formats to ogv. I found some terminal commands like this: ffmpeg -i input.avi -acodec libvorbis -ac 1 -b 768k output.ogg The problem with these type of commands is that they are intended to change bit rate, fps, or even resolution. I would like to just change the file format without changing anything else about the video. I looked at the man pages for ffmpeg and found some useful info but I don't know how to space command-line options. Are there any easy ways to do this? In addition, is there a command to change the bit rate so that it doesn't go over a certain rate?

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  • Looking for Non Hosted Audio & Video Podcasting Solution for Church Websites

    - by motboys
    I am looking for a solution that will do the following: User uploads audio and/or video files with title, desc. image etc Solution embeds info into ID3 tags Solution generates RSS feed Solution embeds new content in our website Content on website is searchable This is for a couple of church websites I manage. I am looking for the ability to do the above with a sermon mp3 and also a video. At the moment we are doing it with multiple steps / people involved and I want to automate the process. I can't seem to find a solution that does all of the above. Thank you!

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  • Living the Amazon Life [Video]

    - by Asian Angel
    Amazon has an amazing selection of products available to satisfy your needs and desires, but what if their services were to expand even more? This humorous video looks at what it might be like if you could literally get anything you wanted through a unique assortment of Amazon sister-sites! Note: Video contains some language that may be considered inappropriate. AMAZON LIFE [via Geeks are Sexy] What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8 HTG Explains: Why You Shouldn’t Use a Task Killer On Android

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  • Mercury and Sound Waves [Video]

    - by Jason Fitzpatrick
    In this video a tone generator is used to shoot specific frequencies through a large drop of mercury which results in a wide array of unique shapes and patterns created by standing waves–but really, you need to see it to appreciate it. The experiment, put together by Nick Moore, combines a glass dish, a drop of mercury, and a old tone generator to demonstrate standing waves in 3D. Check out the video above to see the experiment in full speed or hit up his YouTube channel to see a remix with music (and other cool science experiment videos). Mercury Hz [via Mental_Floss] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • FFMPEG not extracting part of the video

    - by DNA
    I used FFMPEG to extract portion (5 seconds) of a video like this: ffmpeg -ss 00:30:00 -t 00:00:05 -i original.avi cut1.avi and also like this: ffmpeg -ss 1800 -t 5 -i original.avi cut1.avi But what FFMPEG did was create a file starting at 00:30:00 and included the rest of the file instead of just 5 seconds. So instead of having a 5 second video clip, I now have the whole file except the first 30 minutes. What went wrong? I tried this with mencoder as well -- same result. EDIT 1 Strangely, this worked on OS X....

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  • Triple monitors on hybrid video system GeForce+Intel

    - by v_mil
    I use Lenovo Ideapad Z580A with hybrid video: GeForce+Intel with Ubuntu 12.10 x64 Ukrainian. It has internal display and two outputs: HDMI and VGA. When I connect third display to VGA all displays go black. Pressing alt+backspace and login causes output to two displays: internal and VGA. System Settings - Displays (or monitors - I have Ukrainian interface) shows three displays: two are on, one (DVI) is off. Turning DVI on and pressing apply causes an error: Can not set configuration of controller CRTC 65. BIOS setting is Optimus (two video cards). Driver for GeForce is Nouveau. With best regards. Viktor.

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  • Video playing is slow on 12.04

    - by user58439
    I started using Ubuntu a very short time ago, and it was working perfectly! I upgraded to 12.04 yesterday, and today I realize that everything is running slow. For example, video streaming online, from sites such as Youtube is not working correctly, audio and video breaks constantly. I have a 64 bit system, with a Intel® Core™2 Duo, 2.10GHz × 2 . I don't know what more to add. I tried free -m on the terminal, it returned that I had only 524MB free from 3858MB. All that i have running at this point is Mozilla Firefox.

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  • html5 video secure streaming?

    - by citizenmatt
    Does html5 allow me to do secure streaming video? And by this, I mean token authentication. I want to be able to stream media only to those people who are authorised to view it. I can do this currently with Flash Media Server hosted by Akamai - they have a custom mechanism where I send them a token as part of the player connection handshake. Does html5 allow for this, and has anyone implemented this with a hosting service such as Akamai? Thanks Matt

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  • Pay per view video solution

    - by Bassem Hefny
    Hello, We are planning on building a pay per view (PPV) video solution but we have no idea from where to start. Here are the current givens: it will be hosted on Linux using PHP Database: MySQL And by PPV I mean: - going to website, selecting a movie to watch/download - going to payment portal and paying - being now able to watch/download So here is my question, from where to start? is there an existing (recommended) solution that we can download/buy? Any information would be really appreciated

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  • Secure Streaming CDN Video Content

    - by Donalds
    Hi, I am using Amazon CloudFront to stream paid video content to my users and I am having problems getting the videos secured. Wowza does that by creating a secure token, but the use of wowza would be much more costly. Is there anyway that I can better protect my content by using Cloudfront or other CDN? Thanks!

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  • Lightweight Flash Video Recording Server

    - by sharjeel
    I am currently using Wowza Media server for recording videos from webcam using Flash. However servers like Wowza, Red5 & Flash Media Server seem to be overkill for merely this task. Are there any alternative lightweight video recording servers which can be used for the purpose? My load would not be more than 5 users at a time and my server is Ubuntu 8.04. I tried Haxe Server but project seems to be outdated and won't compile on my Ubuntu.

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  • Video and Audio Drift

    - by Cenoc
    Hey everyone, I was wondering, how much does recorded audio and video drift from their actual recording time usually? I'm recording both separately (into unsigned 8 bit PCM (44100 Hz) and raw image data files) and I was wondering how much I can expect each to drift. Thanks in advance!

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