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• How to Make a 9 Layer Density Column [Video]

  - by Jason Fitzpatrick

  Density columns, layers of varying density liquid in a glass cylinder, are nothing new in the world of science demonstrations, but this nine layer one with seven floating objects is something to see. Courtesy of Steve Spangler Science, the experiment goes above and beyond the traditional five layer column by adding another four layers and sinking objects of varying density into the column. The end result is a colorful demonstration of the varying densities of liquids and solids. [via Boing Boing] How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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• Facebook video is too choppy to watch.

  - by Greg Pauline

  Using firefox and chrome on an Acer Aspire 5100 with an AMD Turion 64 MK36 processor with 2GB of RAM and an ATI Radeon Xpress 110 Graphics card. I had a problem viewing Vimeo and youtube that has now been resolved with the help of this website. But now I find that trying to watch Facebook videos from family and friends is impossible due to the terrible choppy frame rate and near freezing of the browser window. Any idea what is going on and how to fix it?

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• HTML5 video capture and streaming?

  - by Shyatic

  I'm working on kind of an educational site, where there are teachers and students around the world (potentially). Since it's a non-profit site, and I don't have the need for it to be done tomorrow (kind of a side project of something bigger), I wanted to know the best way to figure out how to do this. I'm not a programmer by trade, I've been on the systems side of things for years, but I understand most technology and the question here is more how to gauge what to do so I can get the right resources in place. That said... here's what I am looking at. I figure the future is HTML5, and that's probably where I'd rather spend my efforts given that it will be cross platform and without the need for plugins. It will work on mobile as well. Question is, how well does HTML5 handle input media, say desktop capture and camera, or on mobile perhaps, where I'd want to use the user's phone camera, etc. Second question is dynamic streaming... I've read about MPEG DASH, then there are technologies like Smooth Streaming (which I think given the way Silverlight is going is going to be gone or useless), then also Apple and Flash, but if I'm doing HTML5 it doesn't benefit me. Any ideas here would be really helpful, and the more detail the better! :) That's about it... there are free chat services out there like using the MSN Web Chat controls (how good they are, I don't know, but worldwide most people have a Hotmail/MSN account) so I can use that for chat. I don't know its limitations of course, but that's something if people know or have suggestions, then I'm all ears. Thanks for the help, I greatly appreciate it!

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• What if the Earth were Hollow? [Video]

  - by Asian Angel

  What would things be like if you dug a tunnel completely through the Earth for travel purposes or if our planet were hollow? Minute Physics takes a look at how things would be if either of these scenarios actually existed. What if the Earth were Hollow? [via Geeks are Sexy] How To Switch Webmail Providers Without Losing All Your Email How To Force Windows Applications to Use a Specific CPU HTG Explains: Is UPnP a Security Risk?

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• Apache DVB http video Streaming bandwidth or priority problem

  - by igino manfre'

  I'm streaming few precompressed DVB videos from cloud. The streams are generated from VLC on "impossible" ports (such as 64085, 64086 etc) reverse proxed by Apache on port 80 and 8080. All the generated streams are listed in "http://95.110.164.61/indexv.html". From an ADSL connection with enough downlink bandwidth, recalling the stream generated by VLC (such as "http://95.110.164.61:64087/mpg2_6.4") it flows fluently. Recalling the same stream proxed by Apache ("http://95.110.164.61/mpg2_6.4") the stream stops and goes. The only situation in which the Apache proxed streams flow regularly is from a site connected through 64 Mbps warranted bandwith with RTT to the server less than 10 mseconds. Please note that streams below 2 Mbps are fluently proxed. The system is a single core xeon with windows 2008 R2 on 4 GB of RAM with 1 Gbps of network bandwidth. The drain of computational and bandwidth resources is negligeable, the RAM usage always lower than 50%. On the system I run many VLC streamers. Any of them drains a variable amount of RAM (from about 25 to 70 MB). On the contrary the couple of httpd.exe processes drain no more than 7 MB. Using Wireshark (on the server) I see that VLC directy send to the client much more packets than Apache, and the stream is framgmented on many frames. I'm not a programmer, a newby of Apache. Can anyone please address me to a specific portion of the Apache's huge documentation? Thank you. igino

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• A LEGO-Themed Take On the Movie Inception [Video]

  - by Jason Fitzpatrick

  This Inception-inspired short film combines LEGO and CGI to great effect. Courtesy of a Staffordshire University design team, the short is a result of roughly a thousand hours of design work spread between seven students to serve as their semester project in visual FX. It has everything you could want from Inception rendered in LEGO: folding landscapes, flying bricks, an a LEGO man or two even loses his head. [via Geeks Are Sexy] 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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• Leeroy Jenkins Reimagined As a Bank Heist [Video]

  - by Jason Fitzpatrick

  In this 3-minute short film, Leeroy Jenkins of World of War Craft infamy, brings his raid-botching power to the real world in a bank heist gone wrong. If you haven’t seen the original Leeroy Jenkins clip, watch it first to properly contextualize this entertaining little film. [via Super Punch] HTG Explains: Learn How Websites Are Tracking You Online Here’s How to Download Windows 8 Release Preview Right Now HTG Explains: Why Linux Doesn’t Need Defragmenting

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• Install lubuntu on an old Dell c600 : Video issues

  - by maniat1k

  I am trying to install lubuntu on an old laptop. I use the 386 alternate instalation of it, because it has only 256mb ... All when ok so when I start up the lubuntu the screen splits between 1024x768 and 800x600... its very horrible to use =). Ok I do this: lspci and found an ATI Rage mobility M3. So I tryied the old xorg way to edit the missing resolution: Section "Screen" Identifier "Default Screen" Device "ATI Technologies, Inc. Rage Mobility M3 (AGP)" Monitor "Generic Monitor" DefaultDepth 24 SubSection "Display" Depth 1 Modes "1024x768" EndSubSection SubSection "Display" Depth 4 Modes "1024x768" EndSubSection SubSection "Display" Depth 8 Modes "1024x768" EndSubSection SubSection "Display" Depth 15 Modes "1024x768" EndSubSection SubSection "Display" Depth 16 Modes "1024x768" EndSubSection SubSection "Display" Depth 24 Modes "1024x768" EndSubSection EndSection on an brand new xorg.conf... Do an init 6 to see if X take the changes, but nothing habbened: also tryed to do pkg-reconfigure -changedir /etc/X11 (where I created the new xorg.conf) and nothing.. removed the X conf from /tmp.. also do sudo apt-get update / upgrade... and no luck... Anyone can help me and tell me how to reconfigure X with the terminal? Can anyone give me a hand?

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• How Hot Can It Get? [Video]

  - by Asian Angel

  The coldest temperature possible is zero degrees Kelvin, but how hot do you think it can actually get? Watch as Vsauce discusses the varying levels of temperatures, what happens at those levels, and ends with the hottest possible temperature known to humanity. How Hot Can It Get? [via Geeks are Sexy] Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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• Photo and Video backup [closed]

  - by MyNameIsTooCommon

  Apologies if this is the wrong forum. Please move if necessary I want to back up all my photos and videos online. Some videos are HD and up to 2GB in size. Does anyone know of any good sites? Flcker and Picasca seem the obvious ones but there seem to be limits on size. I have also heard bad things about the Picasca UI. I basically want to remove most of the photos from my laptop HD and then sync with web when I want to download them. Viewing via mobile is not a big thing for me. I just want somewhere save to back up stuff. Thanks

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• Video playback in games - formats & decoding

  - by snake5

  What free / non-restrictive open-source solutions (not GPL) are available for decoding game videos? The requirements are simple: a relatively easy to use C API encoded files must be quite small there must be an application that converts videos from any format (whatever codec is installed on Windows or equivalent amount of internally decoded formats) decoding has to happen fairly quickly bonus points go to file formats that are popular / actively supported and developed

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• php request youtube video is not working [closed]

  - by m3tsys

  what is wrong to this code? header('Content-type: application/x-shockwave-flash'); $video_id = $_REQUEST['id']; $content = readfile("http://www.youtube.com/watch?v=$video_id"); echo $content; or header('Content-type: application/x-shockwave-flash'); $video_id = $_REQUEST['id']; $content = readfile("http://localhost/embed/player.swf?file=http://www.youtube.com/watch?v=$video_id"); echo $content; Why this code is not working? How should look the code?

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• The ‘Coolest’ Server You will Ever See [Video]

  - by Asian Angel

  What is a little bit of snow-covered server between friends, right? From YouTube: This is an experimental Free Air Cooling setup called a Helsinki Chamber. You can learn more about this experimental server cooling technology here. Snow is not a problem for servers in Finland [via Fail Desk] Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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• No video signal after install

  - by tW4r

  Today I tried to install Ubuntu 12.10 to my machine, but all the time I encountered the same problem, I successfully boot from Ubuntu 12.04 DVD, and a purple background comes up with accessibility and keyboard icons at the bottom of the screen, then when you wait a while a monitor text comes up "No signal" (Keep in mind that this signal is only shown when there's cable in the monitor HDMI plug), and nothing happens, a little later disk drive stops flashing meaning that disk finished being read. Even if you reset the computer you still get no signal, you have to turn the power of and on again, and plug HDMI out and put it in again. My info: Graphics card: ATI/AMD Radeon HD 4850 Connection to monitor: HDMI Monitor: Samsung SyncMaster T220HD

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• HTML5 video - Safari (Mac) - live HLS stream - seek in live buffer

  - by bsnote

  I have the following HTML: <head> </head> <body> <button type="button" onclick="onSeek();">Seek</button> <video id="video" src="http://<host>/somevideo.m3u8" autoplay controls> </video> <script src="http://code.jquery.com/jquery-1.7.2.min.js"></script> <script> function onSeek() { var video = $('#video')[0]; video.currentTime = -300; } </script> </body> When I open the page, the m3u8 playlist has already about 100 media segments (5 min). Since it's a live video it starts playing from one of the last media segments and video.currentTime is set to 0. video.seekable.start(i) and video.seekable.end(i) shows the seekable range which is 0..currentTime. How can I seek to the previous media segments, say 5 min back? video.currentTime = -300 doesn't work. It resets currentTime to 0.

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• GWT & HTML5 Video in Mobile Safari

  - by KevMo

  I'm trying to code a site in GWT that plays videos with HTML5. Everything works great on the desktop, but mobile Safari on both the iPhone and iPad do not play the video. I can play a video using Video for Everybody. I've even copied the code to my own plain HTML page, and it works flawlessly. If I serve that same code via a GWT widget, mobile safari will not play the video. On the iPhone I see a gray box with a prohibitory sign around the play button, and on the iPad it shows up as a black box. I've made sure my doctype is <!DOCTYPE html>, but I don't know where else to start debugging. Perhaps it it because the code is injected via javascript? Any pointers on where to start looking would be greatly appreciated. Here is the exact code I am using for the video: <!-- "Video For Everybody" by Kroc Camen. see <camendesign.com/code/video_for_everybody> for documented code =================================================================================================================== --> <video width="640" height="360" poster="poster.jpg" controls autoplay> <source src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" type="video/mp4"></source> <source src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.ogv" type="video/ogg"></source> <!--[if gt IE 6]> <object width="640" height="375" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"><! [endif]--><!--[if !IE]><!--> <object width="640" height="375" type="video/quicktime" data="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"> <!--<![endif]--> <param name="src" value="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" /> <param name="autoplay" value="true" /> <param name="showlogo" value="false" /> <object width="640" height="384" type="application/x-shockwave-flash" data="player.swf?autostart=true&amp;image=poster.jpg&amp;file=http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"> <param name="movie" value="player.swf?autostart=true&amp;image=poster.jpg&amp;file=http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" /> <!-- fallback image --> <img src="poster.jpg" width="640" height="360" alt="Big Buck Bunny" title="No video playback capabilities, please download the video below" /> </object><!--[if gt IE 6]><!--> </object><!--<![endif]--> </video>

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• How do i have 4GB of video memory with a 1GB video card?

  - by Tomas Spc Yaczik

  I ran the direct X diagnostic tool to take a look at my graphics capabilities and its telling me that the approximate video memory is clocked in at 4096MB. That doesn't make any sense, how is that possible? The only things that i can think of were that DirectX was inaccurate so i looked at the graphics statistics of my computer on CPU-Z which was included with the motherboard and that's telling me i have "negative" 1988MB. Not only is that not 4096MB, but its giving me a negative number and i know for a fact that you can't have a negative amount of memory???!!! The only things i can think of that would be amplifying my video memory output is the PCIe 3.0 bus, or that the motherboard is somehow including the on board video chip set with the video card which only then is only 2GB of video memory, which still has to be being amplified by something. Any suggestions?

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• Fullscreen Video stutters on second monitor laptop

  - by nobrandheroes

  Fullscreen video on my new 1080p monitor is choppy when it comes from my laptop. The same video plays when not full screen. This goes for all video(Flash/MKV, etc), regardless of video resolution. I have an ATI Mobility Radeon HD 4200 Series card in my Thinkpad Edge, Turion X2 2GHz. The computer plays 1080p fine. Things I've tried: Updating Drivers Switching cables Turning Hardware Acceleration Changing video players process priority Rebooting Turning of laptop screen Turning off unused processes Nothing Works. What is the likelyhood that my laptop cannot power a 1920x1280 display?

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• 3.5mm headphone jack -> Component video?

  - by Isaac Waller

  Hello, I have a strange cord that has a male 3.5mm headphone jack on one side, and some component video and audio ouputs on the other. When I plug the headphone side into my computer, and the other side into my TV, I get audio across the cable, but no video. How can I send some video over the headphone jack in OS X? I know you can, because this cable is actually for a Beyblade toy and it somehow transferred video over this cable. Thanks, Isaac I think I found some more information (from Wikipedia:) "A four conductor version (of a 3.5mm headphone jack) is becoming a de facto standard output connector for compact camcorders, providing stereo sound plus a video signal." So how can I do this on Mac?

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• What are the ways to do synchronized streaming video and text?

  - by Marc

  I would like to have two streams. One being traditional streaming video and another being text. I will also build an interface that allows the user to create the text portion while watching the video. The context of these videos are usually that of an individual being filmed doing a presentation and later the next day for example, a coach will make text annotations (structured data is a plus) with the result being the text stream. It seems this is possible with Silverlight (see the article in the latest MSDN). However, what other methods are there if any? If there any, please give the reasons for why you are recommending them. Thanks. Also, I would prefer something that inst a software as a service hosted solution, but, dont let that keep you from giving an answer. Also keep in mind, the user shouldn't have to do any re-encoding of the video source, the text stream should be separate with someway to synchronize a coach's comments to an arbitrary time stamp in the video.

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• How many copies of files are needed by video server?

  - by Trilok

  A quick question. How many copies of the same movie are kept in a video server (a video streaming server)? Suppose a particular video is at max requested by 1000 users at the same instant of time, how many copies would be sufficient so that parallel streams can be provided to each user? Ideally 1 copy would solve the purpose, but what is the optimum number keeping the bandwidth and simultaneous access in mind?

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• Need advice on how to set up live video streaming to web/mobile devices

  - by jasondewitt

  I have a bunch of live udp video streams that currently are viewed by set top boxes in my network. I would like to pick this video up (I can do this with vlc now) and stream it out to other non-STB endpoints (webpage or a phone/tablet of some sort). Right now I am able to pick up the udp stream with vlc and convert it to an http stream on port 8080 of my vlc box. Then I can use the vlc client to pick up and watch that video stream. This is where I'm not sure where to go with it. I really doubt I would want everyone who is watching the video to make a connection back to my vlc server that is doing the encoding, so how do I distribute this live video to the people who want to see it?

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• How do I disable auto- poster image generation on the video tag?

  - by ekallevig

  I'm using the 'poster' attribute on a video tag and the way it seems to work at least in webkit browsers is that it loads the poster image and then once enough of the video has loaded, it replaces that poster with an auto-generated poster from the video file itself. However, my poster images don't match the auto-generated posters which results in a weird experience of one image loading, then being replaced in a few seconds by the auto-generated image. Is there any way to prevent the auto-generated image from being used?

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• ffmpeg - creating DNxHD MFX files with alphas

  - by Hugh

  I'm struggling with something in FFMpeg at the moment... I'm trying to make DNxHD 1080p/24, 36Mb/s MXF files from a sequence of PNG files. My current command-line is: ffmpeg -y -f image2 -i /tmp/temp.%04d.png -s 1920x1080 -r 24 -vcodec dnxhd -f mxf -pix_fmt rgb32 -b 36Mb /tmp/temp.mxf To which ffmpeg gives me the output: Input #0, image2, from '/tmp/temp.%04d.png': Duration: 00:00:01.60, start: 0.000000, bitrate: N/A Stream #0.0: Video: png, rgb32, 1920x1080, 25 tbr, 25 tbn, 25 tbc Output #0, mxf, to '/tmp/temp.mxf': Stream #0.0: Video: dnxhd, yuv422p, 1920x1080, q=2-31, 36000 kb/s, 90k tbn, 24 tbc Stream mapping: Stream #0.0 -> #0.0 [mxf @ 0x1005800]unsupported video frame rate Could not write header for output file #0 (incorrect codec parameters ?) There are a few things in here that concern me: The output stream is insisting on being yuv422p, which doesn't support alpha. 24fps is an unsupported video frame rate? I've tried 23.976 too, and get the same thing. I then tried the same thing, but writing to a quicktime (still DNxHD, though) with: ffmpeg -y -f image2 -i /tmp/temp.%04d.png -s 1920x1080 -r 24 -vcodec dnxhd -f mov -pix_fmt rgb32 -b 36Mb /tmp/temp.mov This gives me the output: Input #0, image2, from '/tmp/1274263259.28098.%04d.png': Duration: 00:00:01.60, start: 0.000000, bitrate: N/A Stream #0.0: Video: png, rgb32, 1920x1080, 25 tbr, 25 tbn, 25 tbc Output #0, mov, to '/tmp/1274263259.28098.mov': Stream #0.0: Video: dnxhd, yuv422p, 1920x1080, q=2-31, 36000 kb/s, 90k tbn, 24 tbc Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding frame= 39 fps= 9 q=1.0 Lsize= 7177kB time=1.62 bitrate=36180.8kbits/s video:7176kB audio:0kB global headers:0kB muxing overhead 0.013636% Which obviously works, to a certain extent, but still has the issue of being yuv422p, and therefore losing the alpha. If I'm going to QuickTime, then I can get what I need using Shake, but my main aim here is to be able to generate .mxf files. Any thoughts? Thanks

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• Apple video adapters: Mini-DVI to DVI + DVI to video?

  - by Ken

  I have: a Macbook (which has Mini-DVI output) an Apple Mini-DVI to DVI adapter (so I can hook up my Macbook to my DVI LCD) a Mac mini (which has DVI output) I see that I can get a DVI-to-Video (s-video and composite) adapter from Apple that will let me hook up my Mac mini to my TV set (which has only component, s-video, and composite -- nothing digital). So far so good. Question: Will that same adapter also let me hook my Macbook to my TV? That is, can I hook Macbook - Mini-DVI to DVI - DVI to video - TV set, and see picture? I know there are digital/analog/integrated variants of DVI, and it's not at all clear to me what pins these things have and what signals they're sending. One website I found suggested that it would work, and another suggested that it wouldn't even physically connect. So I'm looking for, ideally, someone who's actually tried it, or has these adapters sitting around to try. I know I can buy 2 adapters (Mini-DVI to Video, and DVI to Video) to do this, but at $20 a pop I'll avoid that if at all possible.

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