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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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• How do you navigate and refactor code written in a dynamic language?

  - by Philippe Beaudoin

  I love that writing Python, Ruby or Javascript requires so little boilerplate. I love simple functional constructs. I love the clean and simple syntax. However, there are three things I'm really bad at when developing a large software in a dynamic language: Navigating the code Identifying the interfaces of the objects I'm using Refactoring efficiently I have been trying simple editors (i.e. Vim) as well as IDE (Eclipse + PyDev) but in both cases I feel like I have to commit a lot more to memory and/or to constantly "grep" and read through the code to identify the interfaces. As for refactoring, for example changing method names, it becomes hugely dependent on the quality of my unit tests. And if I try to isolate my unit tests by "cutting them off" the rest of the application, then there is no guarantee that my stub's interface stays up to date with the object I'm stubbing. I'm sure there are workarounds for these problems. How do you work efficiently in Python, Ruby or Javascript?

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• Books or guides regarding secure key storage and database encryption

  - by Matty

  I have an idea for a SaaS product I want to create, however, this product will store extremely sensitive data that needs to be encrypted at rest. The trouble is not so much the encryption, but the problem of securely storing the keys so that in the event the server was somehow compromised, the keys couldn't just be recovered and used to decrypt the database. Are there any decent books to guides regarding database encryption, and in particular secure key storage? This seems to be a less than straightforward topic and something that is difficult to get right. I'm seeing multiple ways to attack such a system, but unable to come up with one that is secure enough to store highly confidential information.

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• My JavaOne 2012

  - by Geertjan

  I received a JavaOne speaker invitation for the following sessions and BOFs. Only one involves me on my own: Session ID: CON2987Session Title: Unlocking the Java EE 6 Platform The rest are combo packages, i.e., you get multiple speakers for the price of one.  Sessions and BOFs together with others:  Session ID: BOF4227 (together with Zoran Sevarac)Session Title: Building Smart Java Applications with Neural Networks, Using the Neuroph Framework Session ID: BOF5806 (together with Manfred Riem)Session Title: Doing JSF Development in NetBeans 7.1 Session ID: CON3160 (together with Allan Gregersen and others)Session Title: Dynamic Class Reloading in the Wild with Javeleon Discussion Panels:  Session ID: CON4952 (together with several NetBeans Platform developers)Session Title: NetBeans Platform Panel Discussion Session ID: CON6139 (together with several NetBeans IDE users)Session Title: Lessons Learned in Building Enterprise and Desktop Applications with the NetBeans IDE

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• Display launcher over a GNOME panel (instead of under)

  - by Greg Treleaven

  I've set up my desktop so that I have a classic style gnome-panel at the bottom to show my active applications with a main menu button on the side. The problem is that the panel stretches across the whole width of the screen and over the launcher, making it difficult to access the icons at the bottom. I could untick the expand option in the panel's properties, but there's no way to resize it so it takes up the rest of the right part of the screen, which is what I want. And if enough applications are open it stretches all the way anyway. I don't want to auto-hide it either. What I'd like to do is make the launcher go over the top of the panel so I can fully access both the launcher and the panel at the same time. If it's possible, how do I do this?

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• A* how make natural look path?

  - by user11177

  I've been reading this: http://theory.stanford.edu/~amitp/GameProgramming/Heuristics.html But there are some things I don't understand, for example the article says to use something like this for pathfinding with diagonal movement: function heuristic(node) = dx = abs(node.x - goal.x) dy = abs(node.y - goal.y) return D * max(dx, dy) I don't know how do set D to get a natural looking path like in the article, I set D to the lowest cost between adjacent squares like it said, and I don't know what they meant by the stuff about the heuristic should be 4*D, that does not seem to change any thing. This is my heuristic function and move function: def heuristic(self, node, goal): D = 10 dx = abs(node.x - goal.x) dy = abs(node.y - goal.y) return D * max(dx, dy) def move_cost(self, current, node): cross = abs(current.x - node.x) == 1 and abs(current.y - node.y) == 1 return 19 if cross else 10 Result: The smooth sailing path we want to happen: The rest of my code: http://pastebin.com/TL2cEkeX

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• Xamarin Wins Funding, Microsoft Builds Repair Tool

  Let's focus on the Xamarin news first. Xamarin is a young company with a phoenix-like history. Founded in May of 2011 by Miguel de Icaza and the rest of the team that created Mono, Xamarin got its start, effectively, as Ximian (de Icaza's previous company). Ximian was founded way back in 1999, and created Mono, which TechCrunch describes as an open source project that brings Microsoft's .NET development framework to non-Microsoft operating systems like Android, iOS and Linux. Novell acquired Ximian inn 2003, and continued to fund Mono's development. But apparently, when Attachmate bought No...

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• Quickly and Python Twisted

  - by Aaron

  I am creating a Quickly application that makes use of Python Twisted. When the user launches a window, I want to start the Twisted server I wrote. However, when I do this, it freezes the GUI, because the reactor.run method is constantly running after it is started. I need a way to start the Twisted reactor in its own thread, so that the GUI will continue to operate while the reactor is running. I have read about using Twisted with pyGTK in the Twisted documentation, but I am not sure how I would accomplish this with a Quickly application. What is the best way to start my Twisted server when a window opens without freezing the GUI? Update: My if __name__ == '__main__' statement at the end of my dialog file is: print 'Preparing GLib' GLib.idle_add(before_running) print 'Staring Reactor' from twisted.internet import reactor reactor.run()` I have imported and installed twisted.gtk3reactor earlier on in the file. The before_running method contains dialog = ClientDialog() and dialog.show, as well as the rest of the code I want to run when the dialog opens.

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• Humor in Documentation

  - by Lex Fridman

  Is a small amount of lighthearted wording or humor acceptable in source code documentation? For example, I have an algorithm that has a message hop around a graph (network) until its path forms a cycle. When this happens it is removed from the queue of the node it last resided on which removes it from memory. I write that in a comment, and finish the comment with "Rest in peace, little guy". That serves very little documenting purpose, but it cheers me up a bit, and I imagine it might cheer up other people I'm working with as they read through the code. Is this an acceptable practice, or should my in-code documentation resemble as much as possible the speeches of 2004 presidential candidate John Kerry? ;-)

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• What Can You Do When You Need More Than Just CRM?

  - by charles.knapp

  Sometimes a company needs more than just CRM to grow profitably. What if you also need ERP for streamlining the rest of your operations? Unlike CRM-only companies, Oracle can help you - today. For example, Myriad Genetics was an early pioneer and is currently a global life sciences leader in the exciting field of molecular diagnostic products. To keep pace with company growth, Myriad needed to integrate disparate systems and automate paper-based processes. Furthermore, Myriad needed to increase sales pipeline visibility to maximize customer service. Myriad selected Oracle CRM On Demand and E-Business Suite ERP applications. As a result, Myriad standardized sales processes, ensured greater visibility into the pipeline, and improved customer service. Read more here about Myriad and their business results.

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• #altnetseattle in Closing

  - by GeekAgilistMercenary

  So again, the #altnetseattle Conference easily was one of the most useful events of the year for me.  The amount of ideas, thoughts, and conversations that happen in just those two days often outweigh all the presentations I see at other conferences throughout the year.  The reason is simple, they are directed, to the point, and done with the ideal of open spaces.  This makes each session exhaustive on a particular topics.  Throw together some of the smartest people in the field and you have a bang up awesome energy and conversation. I got to talk about cloud computer, a little bit, and REST Architecture as sessions I kicked off myself.  Those were a blast.  I also got to meet a ton of other super talented like minded developers and engineers that are out there kicking the tires of .NET (and other languages/tech stacks like Ruby on Rails). Overall the conference rocked and I will definitely be coming back!  With that, I am headed home to Portland.

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• Bad texture on model with different GPU

  - by Pacha

  I have some kind of distortion on the texture of my 3D model. It works perfectly well on an AMD GPU, but when testing on a integrated Intel HD graphics card it has a weird issue. I don't have a problem with the rest of my entities as they are not scaled. The models with the problems are scaled, as my engine supports different sizes for the platforms. I am using Ogre3D as rendering engine, and GLSL as shader language. Vertex shader: #version 120 varying vec2 UV; void main() { UV = gl_MultiTexCoord0; gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; } Fragment shader: #version 120 varying vec2 UV; uniform sampler2D diffuseMap; void main(void) { gl_FragColor = texture(diffuseMap, UV); } Screenshot (the error is on the right and left side, the top and bottom part are rendered perfectly well):

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• Writing jenkins plugin: where is the documentation?

  - by user22070

  On my current project we're using Jenkins to monitor our builds. Now they want me to write a Jenkins plugin to add some more monitoring parameters. I've taken a look at how the status monitor plugin works, and I can't figure some things out. I've tried to look for documentation for writing a plugin, but that seems to be sorely lacking. (the site only mentions how to generate the base project, and refers to a tutorial that's not that informative) What I'm trying to do is just add some options to each build, add a link, and a monitoring page. Adding to the main page is apparently done by adding the action, but I'm still trying to figure out the rest. And how it all ties in. Does anyone have any pointers, or a place where I can find some decent documentation?

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• DockbarX inside AWN, preview window shifted on dual-screen after shifting from single-screen.

  - by naaronne

  I've been running dockbarx in AWN for sometime now. I started using dual-screens and started seeing a problem with the window preview. When I hover over the dockbarx icon to see the preview it appears on the other monitor. I'm assuming that this is due to it still thinking there is only one monitor. I was hoping someone new of a gconf-editor setting that I could set with the rest of my screen that changes my laptop from internal monitor to my dual-screen setup. Thanks in advance.

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• Junkyard Jumbotron Creates a Massive Display from Multiple Screens

  - by Jason Fitzpatrick

  Junkyard Jumbotron is a web-based service that performs a rather unique function. It allows you to turn any number of screens into a massive collective display for showcasing photos. You’ll need screens of some sort (any will work: old CRT monitors, iPads, cell phones) and a way to get them online. Each screen needs to be able to access the web; Junkyard Jumbotron takes care of the rest. Check out the video above to see it in action or visit the link below to read more. Junkyard Jumbotron [via BoingBoing] Internet Explorer 9 Released: Here’s What You Need To KnowHTG Explains: How Does Email Work?How To Make a Youtube Video Into an Animated GIF

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• What are some potential issues in blocking all incoming requests from the Amazon cloud?

  - by ElHaix

  Recently I, along with the rest of the world, have seen a significant increase in what appears to be scraping from Amazon AWS-related sources. So simply put, I blocked all incoming requests from the Amazon cloud for our hosted application. I know that some good services/bots are now hosted on the cloud, and I'm wondering if certain IP addresses should be allowed, as they may gather data that would in the end benefit our site's SEO rankings? -- UPDATE -- I added a feature to block requests from the following hosts: Amazon Softlayer ServerDeals GigAvenue Since then, I have seen my network traffic decrease (monitored by network out bytes). Average operation is around 10,000,000 bytes. You can see where last week I was not blocking, then started blocking. I've since removed the blocks and will see what the outcome is.

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• Why didn't IE8 support border-radius, evil or ignorance?

  - by Mark Rogers

  When I think back to the time of the release of IE7, I was surprised that there wasn't border-radius support. It seems like an obviously great idea to have a css-property name for rounded corners, which can potentially make a site look less like it came from the computer stone-age. Finally, today we have IE9 and Microsoft finally decided to play ball with the rest of the world. But the question remains, why didn't Microsoft bother to support border-radius in IE8? The problem probably became obvious to the company as the growing chorus of complaints from web developers got louder after the release of IE7. Was the company so isolated or in group-think mode that they were blind for that many years? Or did Microsoft have some additional motive to suppress the border-radius property?

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• Whats a good structure to save and retrieve locations of images?

  - by Goot

  I got a java-ee application, where I collect informations about movies. Im my backend I provide data like the name, description, genre and a random uuid. I also got lots of related files, which are stored on a file server. Including some screenshots, the dvd or bluRay cover and video trailers. My current approach is: When saving the files to the fileserver, I retrieve the movies random uuid (which is the primary key btw.). I then rename the files screenshot_[UUID]_1, screenshot_[UUID]_2 ... etc. Now, there are lots of other ways to handle this, like saving all filenames in a database or creating a dir structure on the fileserver for every uuid and, e.g., return all images in the "[uuid]/screenshots" folder via REST. I expect about 30k requests a day, so the service has to be pretty performant. Whats the best way to solve this?

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• Choppy window movement in Gnome 3.4 on Ubuntu 12.04

  - by mjrussell

  I have been using Gnome 3.2 since Ubuntu 11.10 was released and it has always been perfectly smooth and performed extremely well, much better than Unity. After doing a clean installation of Ubuntu 12.04, Gnome 3.4 performs less well. If just one window of a relatively simple application, such as Gnome Terminal, is opened and moved around, the movement is sometimes very choppy, but the rest of the time it's perfectly smooth. The times when it's choppy seem to be when part of the window goes off the bottom or right side of the screen. Also, if there are multiple windows open, it is almost always choppy. These facts suggest to me that it's something to do with the compositor. Unity works perfectly smoothly. Memory usage is only at about 500-600MB, out of 3GB, even with a few things open. The graphics card is the on-board Intel graphics on the Core i5 M450. Does anyone have any ideas what might be causing this problem? Thanks

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• What is the career path for a software developer/ programmer? [closed]

  - by Lo Wai Lun

  I've been working as a programmer for a few months and I often study CCNA , CISSP for future. Besides simple coding I was working on specs, designing applications, and all those around-like things. My question is, I want to be a information / system security specialist. what's the career path I should be aiming for? Is it like working on code for the rest of my life? :) Restart my career from the network engineer ? Or do programmers make a good manager-position people ? I know it's very subjective. Thing is, lately I find myself much more into the designing/working on specs part of the development project then the coding itself. How do you see it? Would you like to go from development to information security? Would you like to work on a project with a manager that used to be a coder?

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• How to make natural-looking paths with A* on a grid?

  - by user11177

  I've been reading this: http://theory.stanford.edu/~amitp/GameProgramming/Heuristics.html But there are some things I don't understand, for example the article says to use something like this for pathfinding with diagonal movement: function heuristic(node) = dx = abs(node.x - goal.x) dy = abs(node.y - goal.y) return D * max(dx, dy) I don't know how do set D to get a natural looking path like in the article, I set D to the lowest cost between adjacent squares like it said, and I don't know what they meant by the stuff about the heuristic should be 4*D, that does not seem to change any thing. This is my heuristic function and move function: def heuristic(self, node, goal): D = 10 dx = abs(node.x - goal.x) dy = abs(node.y - goal.y) return D * max(dx, dy) def move_cost(self, current, node): cross = abs(current.x - node.x) == 1 and abs(current.y - node.y) == 1 return 19 if cross else 10 Result: The smooth sailing path we want to happen: The rest of my code: http://pastebin.com/TL2cEkeX

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• web services, J2EE, spring, DB integration project ideas- maybe data mining related?

  - by sj88

  Hey guys, I am a graduate CS student (Data mining and machine learning) and have a good exposure to core JAVA (3 years). I have read up a bunch of stuff on Design patterns J2EE Web services( soap and rest) spring and hibernate Java Concurrency - advanced features like Task and Executors. I would now like to do a project combining this stuff (over my free time of corse) to get a better understanding of these things and to kind of make an end to end software (to learn the best design principles etc + svn, maven). Any good project ideas would be really appreciated. I just wanna build this stuff to learn so I dont really mind re-inventing the wheel. Also, anything related to data mining would be an added bonus (fits with my research) but absolutly not necesary (since this project is more to learn to do large scale software developement)

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• Xubuntu 12.4 upgraded fine but there are everywhere pale grey windows/menus with white fonts!

  - by Costa

  I upgraded to Xubuntu 12.4 through the update manager. Everything works fine except that many windows and menus (Ubuntu Software Center,Transmission properties etc) apear in pale grey with white fonts. For examle, it's impossible to read n change properties on Transmission. Titles apear excellently, the rest is really hard to read: white text on allmost white background ... I have tried already:rebooting, changing theme/apearance photo1 http://en.zimagez.com/zimage/-26042012-102025.php When login as guest everything works fine. I created a new account, all is fine photo2 http://en.zimagez.com/zimage/-26042012-103258.php But I still want my initiall user-account which i had so well tuned...

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• "Super meatboy"-ish replay

  - by Ron

  I'm making a platformer built from mini-levels - and I want to create a sort of a replay of all the player tries that the player did for the level. My question is - what is the best way to record the player's actions in-game, so that I could replay them later when he finishes the level. I thought about recording only the player's input and replay them later on, each on a clone of the player. The problem I have with this is with dynamic obstacles (that could be moved around) - if one clone moves them, it throws the simulation off for the rest of the clones. So then I thought about recording every frame the X/Y of the player, and then just replay it - but that seems it could cause a major memory leak and very ineffective. So - does anyone have any ideas? :)

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• GDD-BR 2010 [1C] Google Web Tookit: What it is, How it Works and Deeper Dives

  GDD-BR 2010 [1C] Google Web Tookit: What it is, How it Works and Deeper Dives Speaker: Chris Ramsdale Track: Cloud Computing Time slot: C [12:05 - 12:50] Room: 1 Level: 151 If you're like the rest of us, at some point in your web app development you've wondered if there was an easier solution. One that includes built-in debuggers, code refactoring, reliable syntax highlighting, etc. After all, why should the server-side and desktop programmers get all of the good tools? The good news is that with Google Web Toolkit (GWT) you do have access to these tools. And in this session, Chris Ramsdale will get you up and running with GWT, including what it is, how it works, and deeper dives into generators, native Javascript interop, and compiler optimizations. From: GoogleDevelopers Views: 1 0 ratings Time: 35:02 More in Science & Technology

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