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Articles indexed in March 2010

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  • Split MPEG video from command line?

    - by Tim
    I have a homemade DVD that I'm effectively trying to insert chapters into and rearrange - the original author burned it as one long chapter, and I'd like to rip it into smaller pieces and re-encode it into a new DVD. I ripped the DVD with the following command: mplayer dvd:// -dvd-device /dev/sr2 -dumpstream -dumpfile raw.vob I'm running Gentoo Linux with mplayer version 1.0-rc2_p20090731 (the latest available in Portage). I have a list of times that the chapters are supposed to span (for example 30:11-33:25), so my first thought was to rip the entire DVD and use mpgtx to cut out certain pieces of the file. My issue is that running mpgtx -i on the file reports quite a few timestamp jumps: Time stamps jumped from 59.753789 to 0.001622 at position 1d29800 Time stamps jumped from 204963823030450.343750 to 31.165900 at position 2d4f800 Time stamps jumped from 60.077878 to 0.001622 at position 43cc000 Time stamps jumped from 60.024233 to 0.001622 at position 65c5000 Time stamps jumped from 204963823068631.718750 to 52.549244 at position 7fd1000 I've tried to fix the indexes using: mencoder raw.vob -oac copy -ovc copy -forceidx -o fixed.vob -of mpeg But mpgtx will still report timestamp issues. My immediate question: is there a way to take the ripped movie I have and correct its timestamps so I can cut it with mpgtx? If I can get that one issue out of the way, building the rest of the DVD will be smooth sailing. If it's not possible to fix the timestamps on this file: is there a better way to rip small chunks of the DVD into separate files for recompilation later? I'd very much like this to be done on Linux, and it'd be even better if I could script it somehow (feed in a list of start and end positions, or start times and durations, and get out a series of ripped files). If need be, I also have a Mac OS X machine available, but no Windows. Edit: I wound up finding another solution involving HandBrake and ffmpeg (with help from this question), but the question stands. Edit again: Turns out my other solution didn't quite work - the audio desynchronized by about five seconds, in about half of my cut mpgs - so I'm back to square one. Anyone?

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  • What is the use of reflection in Java/C# etc

    - by zengr
    I was just curious, why should we use reflection in the first place? // Without reflection Foo foo = new Foo(); foo.hello(); // With reflection Class cls = Class.forName("Foo"); Object foo = cls.newInstance(); Method method = cls.getMethod("hello", null); method.invoke(foo, null); We can simply create an object and call the class's method, but why do the same using forName, newInstance and getMthod functions? To make everything dynamic?

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  • strcat implementation

    - by skydoor
    I tried to implement the strcat by myself, and I found the strcat implementation from Wiki like this......but when I use it, there is segmentation fault. What's from with the code below? char * strcat(char *dest, const char *src) { size_t i,j; for (i = 0; dest[i] != '\0'; i++) ; for (j = 0; src[j] != '\0'; j++) dest[i+j] = src[j]; dest[i+j] = '\0'; return dest; }

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  • A queue in C using structs and dynamic memory allocation (linked list)

    - by Martin Pugh
    I am tasked with making a queue data structure in C, as a linked list. Our lecturer gave us a large amount of code to implement a stack, but we have to adapt it to create a queue. The code our lecturer gave us ends up not compiling and segfaulting at the exact same point as the code I wrote for the queue. I'm very new to structs, malloc and C in general, so there could be something painfully obvious I've overlooked. Here is the code I am using: #include <stdio.h> #include <stdlib.h> struct node{ int data; //contains the actual data struct node *prev; //pointer to previous node (Closer to front) struct node *next; //pointer to next node (Closer to back) }; typedef struct node *Nodepointer; struct queue{ Nodepointer front; Nodepointer back; }; typedef struct queue *Queuepointer; main(){ Queuepointer myqueue; //create a queue called myqueue init(myqueue); //initialise the queue Nodepointer new = (Nodepointer)malloc(sizeof(struct node)); myqueue->front = new; } int init(Queuepointer q){ q = (Queuepointer)malloc(sizeof(struct queue)); q->front = NULL; q->back = NULL; } The idea is that the queue struct 'contains' the first and last nodes in a queue, and when a node is created, myqueue is updated. However, I cannot even get to that part (pop and push are written but omitted for brevity). The code is segfaulting at the line myqueue->front = new; with the following gdb output: Program received signal SIGSEGV, Segmentation fault. 0x08048401 in main () at queue.c:27 27 myqueue->front = new; Any idea what I'm doing wrong?

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  • Logback to log different messages to two files

    - by Aly
    I am using logback/slf4j to do my logging. I want to parse my log file to analyze some data, so instead of parsing a great big file (mostly consisting of debug statements) I want to have two logger instances which each log to a separate file; one for analytics and one for all purpose logging. Does anyone know if this is possible with Logback, or any other logger for that matter?

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  • How do I initialize the controls in an InsertItemTemplate?

    - by Slauma
    I have - for instance - an asp:FormView which supports Read, Insert, Update, Delete and is bound to a DataSource: <asp:FormView ID="FormView1" runat="server" DataSourceID="ObjectDataSource1" > <ItemTemplate> <asp:Label ID="Label1" runat="server" Text='<%# Bind("MyText") %>' /> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("MyText") %>' /> </EditItemTemplate> <InsertItemTemplate> <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("MyText") %>' /> </InsertItemTemplate> </asp:FormView> If I am in Read-Mode or Edit-Mode the control is initialized with the property MyText of the current object which is bound to the FormView. But when I go to Insert-Mode I do not have a "current object" (FormView1.DataItem is indeed null) and the controls are empty. If I want to have my TextBox control initialized with a specific value how can I do that? In which event can I hook in to set default values to the controls in the InsertItemTemplate? Especially I have in mind using an ObjectDataSource. I was expecting that the InsertItemTemplate is initialized with a business object which underlies my ObjectDataSource and which is created by the ASP.NET framework simply by using its default constructor when the InsertItemTemplate gets activated. In the default constructor I would init the class members to the default values I'd like to have in my controls of the InsertItemTemplate. But unfortunately that's not the case: No "default" object is created and bound to the FormView. So it seems I have to initialize all controls separately or to create the default object manually and bind it to the InsertItemTemplate of the FormView. But how and where can I do that? Thanks in advance!

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  • StructureMap: How can i unit test the registry class?

    - by Marius
    I have a registry class like this: public class StructureMapRegistry : Registry { public StructureMapRegistry() { For<IDateTimeProvider>().Singleton().Use<DateTimeProviderReturningDateTimeNow>(); } I want to test that the configuration is according to my intent, so i start writing a test: public class WhenConfiguringIOCContainer : Scenario { private TfsTimeMachine.Domain.StructureMapRegistry registry; private Container container; protected override void Given() { registry = new TfsTimeMachine.Domain.StructureMapRegistry(); container = new Container(); } protected override void When() { container.Configure(i => i.AddRegistry(registry)); } [Then] public void DateTimeProviderIsRegisteredAsSingleton() { // I want to say "verify that the container contains the expected type and that the expected type // is registered as a singleton } } How can verify that the registry is accoring to my expectations? Note: I introduced the container because I didn't see any sort of verification methods available on the Registry class. Idealy, I want to test on the registry class directly.

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  • Reading bmp file for encrypting and decrypting txt file into it

    - by Shantanu Gupta
    I am trying to read a bmp file in C++(Turbo). But i m not able to print binary stream. I want to encode txt file into it and decrypt it. How can i do this. I read that bmp file header is of 54 byte. But how and where should i append txt file in bmp file. ? I know only Turbo C++, so it would be helpfull for me if u provide solution or suggestion related to topic for the same. int main() { ifstream fr; //reads ofstream fw; // wrrites to file char c; int random; clrscr(); char file[2][100]={"s.bmp","s.txt"}; fr.open(file[0],ios::binary);//file name, mode of open, here input mode i.e. read only if(!fr) cout<<"File can not be opened."; fw.open(file[1],ios::app);//file will be appended if(!fw) cout<<"File can not be opened"; while(!fr) cout<<fr.get(); // error should be here. but not able to find out what error is it fr.close(); fw.close(); getch(); } This code is running fine when i pass txt file in binary mode

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  • Why does yaml.dump add quotes this key-value pair

    - by jason gagne
    I'm trying to write a new entry to a rails database.yml and for some reason I'm getting quotes around this entry db_yml = {'new_env' = {'database' = 'database_name', '<<' = '*defaults' }} File.open("#{RAILS_ROOT}/config/database.yml", "a") {|f| YAML.dump(db_yml, f)} returns --- new_env: database: database_name "<<": "*defaults" I don't know why the "---" and the quotes around the defaults are returned, any thoughts on how to prevent? thanks!

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  • Re-using unit tests for models using STI

    - by TenJack
    I have a number of models that use STI and I would like to use the same unit test to test each model. For example, I have: class RegularList < List class OtherList < List class ListTest < ActiveSupport::TestCase fixtures :lists def test_word_count list = lists(:regular_list) assert_equal(0, list.count) end end How would I go about using the test_word_count test for the OtherList model. The test is much longer so I would rather not have to retype it for each model. Thanks.

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  • C# with keyword equivalent

    - by oazabir
    There’s no with keyword in C#, like Visual Basic. So you end up writing code like this: this.StatusProgressBar.IsIndeterminate = false; this.StatusProgressBar.Visibility = Visibility.Visible; this.StatusProgressBar.Minimum = 0; this.StatusProgressBar.Maximum = 100; this.StatusProgressBar.Value = percentage; Here’s a work around to this: With.A<ProgressBar>(this.StatusProgressBar, (p) => { p.IsIndeterminate = false; p.Visibility = Visibility.Visible; p.Minimum = 0; p.Maximum = 100; p.Value = percentage; }); Saves you repeatedly typing the same class instance or control name over and over again. It also makes code more readable since it clearly says that you are working with a progress bar control within the block. It you are setting properties of several controls one after another, it’s easier to read such code this way since you will have dedicated block for each control. It’s a very simple one line function that does it: public static class With { public static void A<T>(T item, Action<T> work) { work(item); } } You could argue that you can just do this: var p = this.StatusProgressBar; p.IsIndeterminate = false; p.Visibility = Visibility.Visible; p.Minimum = 0; p.Maximum = 100; p.Value = percentage; But it’s not elegant. You are introducing a variable “p” in the local scope of the whole function. This goes against naming conventions. Morever, you can’t limit the scope of “p” within a certain place in the function.

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  • How to create video file from DVD

    - by pkaeding
    I want to take the DVD video slideshow that I got from my wedding photographer, and put the video on youtube (I have permission, I made sure to get the non-exclusive rights to use anything she created while working for me in any way I wanted when we working out the terms before-hand). Can anyone suggest the best way to get a video file that can be uploaded to YouTube from this DVD? The source DVD is not encrypted, so I don't need to worry about that. I am using a Mac, so Mac-friendly suggestions are preferred. Thanks! EDIT: So, I tried Handbrake, and it looks very promising. However, When I select the title in Handbrake, it says it is about 12 minutes long. The resulting file ends up only being about 4 minutes long, and the music is messed up. It seems to be going normally through the photo transitions, but removing the time that the slideshow stays on each photo. I believe the DVD was created using iDVD. Does it do anything weird to save space by varying hte framerate, or anything like that? Are there special settings in Handbrake I need to use?

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  • Good DVD ripper - for Divx

    - by alex
    I'm currently going through my DVD collection, and digitising it, to allow me to watch it on a media streamer (I'm NOT a filesharer!!) I want to know what software i should use, to convert my DVD's to AVI divx format. I currently use Xilisoft DVD ripper, however this creates a "letterbox" at the top and bottom of the file - and there doesn't seem to be a way to turn this off. I'm a novice at video encoding, so would need something fairly simple / well documented.

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  • Mac OS X CD ripping speed

    - by SlimSCSI
    I am using vobcopy (installed via macports) to rip DVDs on a mac. I have been doing this for a while on linux with no problems. On the mac however, it is VERY slow. I am guessing that somehow the DVD drive is being limited to 1x in order to keep noise and power consumption down during playback. Is there a way to over ride this? Update: It is MUCH slower than 1x. It has taken me about an hour to copy 300MB Notes: While I appreciate all suggestions, I am not looking for "Have you tried HandBrake?". I am looking for a solution to copy the contents of a DVD, not transcode them. Also, I am launching vobcopy from an apple script that gets executed on DVD insertion, so a GUI solution is not desirable.

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  • Win7 MCE seems unable to play ripped DVDs

    - by ilivewithian
    I'm running Windows 7 and am using mymovies.dk to rip the dvds to my harddrive. However, playback isn't watchable as the picture is very stuttery and blocky, only shots that show the same image for a few seconds get shown properly. The dvd's are ripped as the straight folder structure and if played in XBMC are fine. I've tried installing both the cccp-project.net and latest div-x codecs, but that doesn't seem to have helped. I'd like to stick with MCE as it has a high WAF (wife acceptance factor). Any suggestions?

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  • How Can I Edit a DVD Already Burned to Disc?

    - by AJ
    I have been asked to edit a DVD - specifically doing the following: Add chapter markers Add chapter selection menu Combine two shorter discs into one I would like to know if there is software that can allow me to import a DVD, make these changes, and then create a new master DVD?

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  • Ripping software for Mac [closed]

    - by CT
    Possible Duplicate: Best Mac OS X DVD Ripper So handbrake will rip dvds and encode them, but what if they are protected? Is there any application out there which will remove any digital rights protection? What are others prefered methods for backing up a dvd library to mac? Please include what software packages you use for reading, ripping, encoding, or playback. Thanks

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  • force lifecycle prerequisite for maven plugin execution?

    - by nsayer
    I use the maven-properties-plugin during the initialization phase to read in a bunch of properties from a properties file. I also have the jetty plugin configured to set a couple of the project properties - including those read in above - as system properties to jetty. If I run the result as mvn initialize jetty:run-war it works. If I just say mvn jetty:run-war it fails. How can I force a goal specified on the command line to run in a lifecycle that includes the initialization phase?

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  • devIL causes program to be unable to start correctly

    - by Mark
    I just tried to use devIL and ULIT to help me with opengl texture loading. However, whenever the program starts, I get the error: "The application was unable to start correctly (0xc000007b). Click OK to close the application." What happened? I'm using the Visual C++ 2010 RC, windows 7 64-bit.

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  • How can I distribute a bookmarklet in FBML?

    - by Eric
    I have a JavaScript bookmarklet that I'd like fans of a certain page to take. Unfortunately, the only way I've found of distributing it is giving them the raw JavaScript source, which is then problematic to add as a bookmark. Ideally, I'd use Drag this to the bookmarks bar But FBML filters out the JavaScript href. Any advice?

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