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• Video with transparent background on page above image background.

  - by fl00r

  Hi! I want to embed some video into my HTML page. As background I want to use big picture. And above it I want to insert loop video with (i.e.) walking man. So, can I embed video (without flash and any player controls) in page? Can I decode video with transparent background? Is there any codecs which support transparent background (alpha-channel)? Now I see this solutions: Making flash (that I don't want to use) Create gif animation (and it will be big file size and quite bad quality)

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• Obtaining the server IP address in WCF?

  - by chris

  How can I obtain the server IP address that was used to connect to a service? The server has multiple IP addresses and I need to know which one the client is connected to. So far I only found that OperationContext.Current.EndpointDispatcher.EndpointAddress and OperationContext.Current.Channel.LocalAddress contain the address from .config (e.g. localhost) OperationContext.Current.IncomingMessageProperties.Via contains the Url that the client used to connect to the server (but this might just be a name from the clients hosts file). EDIT - Sorry, I wasn't being clear enough: The server needs to know which of its IP addresses were used by the client. E.g. the server has the addresses 10.0.0.1 and 10.0.0.2. when processing the request the server service needs to know if 10.0.0.1 or 10.0.0.2 was used by the client to connect to it.

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• Making Overlaid image transparent on touch in Android ?

  - by Andhravaala

  Hi All, I need help on making the touched areas of bitmap image transparent(seems like erasing) while I am moving my finger on that image. I am having a PNG file with Alpha channel in it. I want to turn the touched pixels to transparent so that, the user can feel that he is actually erasing it. For this I am using frame layout to load 2 layers. Down layer is for content and upper layer is an Imageview for erasing. I need erase the upper layer when user touch and move his finger on it. I am not getting how to make it transparent. can anyone please help me in this. If possible please direct me to any sample code, as I am very new to this image processing. Thanks in advance.

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• Actors in Scala.net

  - by weijiajun

  I have recently completed some study of erlang, and was intrigued by scala for its feature set and the ease of interpolating with java (and possibly .net) applications. I am finally studying actors and was wondering if there is an actor mechanism that currently works in .net. I have looked at the libararies that come down with sbaz and have found that there is a scala.Concurrent but no scala.actors.Actor. I tried to use the scala.Concurrent.Channel but was unable to use the ! to send messages. I was just wondering if this is something that is currently available and if so how do you go about setting it up.

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• Accessing Securised Web Service

  - by Xstahef

  Hi, I need to connect to a provider's web service with a Windows Form application. He gives me a certificate to access it but I have a security problem. I have done these following steps : Add certificate to personal store (on IE & Firefox) Generate a proxy with the remote wsdl (no problem) Use this code to call a method : `using (service1.MessagesService m = new service1.MessagesService()) { X509Certificate crt = new X509Certificate(@"C:\OpenSSL\bin\thecert.p12",string.Empty); m.ClientCertificates.Add(crt); var result = m.AuthoriseTransaction(aut); this.textBox1.AppendText(result.id.ToString()); }` I have the following error : The underlying connection was closed: Could not establish trust relationship for the channel SSL / TLS. Thanks for your help

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• Constraints when using WCF for an online multiplayer game

  - by Etan

  I want to build a service oriented game server and client using WCF where users can play card games on different tables after they logged in with an account. I would like to choose WCF due to it's flexibility in exchanging the communication channels. Maybe, a web interface will be added later which can then just use an other channel class. An additional plus is the ability for contexts which could be used to track a user over a whole gaming session. Are there some constraints I should be aware of when using WCF for the communication between the client and the server?

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• wcf possible to override the dipose of proxy

  - by pdiddy

  I'd like to override the Dispose method of generated proxy (ClientBase) because of the fact that disposing of a proxy calls Close and can throw an exception when the channel is faulted. The only way I came up was to create a partial class to my generatedproxy, make it inherit from IDisposable. : public partial class MyServiceProxy : IDisposable { #region IDisposable Members public void Dispose() { if (State != System.ServiceModel.CommunicationState.Faulted) Close(); else Abort(); } #endregion } I did some test and my Dipose method is indeed called. Do you see any issue with this strategy? Also, I don't like the fact that I'll have to create this partial class for every generated proxy. It be nice if I was able to make my proxy inherit from a base class...

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• How to get application to use specific version of .NET?

  - by HN

  Hi, I am using pnunit to run nunit tests on remote machines, the pnunit agent loads the test and runs it in Windows 2008 but the test fails to load in Windows 2003, the agent error is INFO PNUnit.Agent.PNUnitAgent - Registering channel on port 9080 INFO PNUnit.Agent.PNUnitAgent - RunTest called for Test MyTest, AssemblyName test.dll, TestToRun test.Program.myDeployTest INFO PNUnit.Agent.PNUnitTestRunner - Spawning a new thread INFO PNUnit.Agent.PNUnitTestRunner - Thread entered for Test MyTest:test.Program.myDeployTest Assembly test.dll Unhandled Exception: System.BadImageFormatException: The format of the file 'test ' is invalid. File name: "test" Server stack trace: at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, B oolean isStringized, Evidence assemblySecurity, Boolean throwOnFileNotFound, Ass embly locationHint, StackCrawlMark& stackMark) On running procmon and monitoring the agent process i could see that the agent executable was using .NET 1.1 assemblies on Windows 2003 and .NET 2.0 on Windows 2008 which could be an explanation for this behavior. How do I get the agent to use .NET 2.0 on Windows 2003?

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• ADC code in with atmega32

  - by Komal

  uint read_adc(uchar adc_input) { ADMUX=adc_input | (0x00 & 0xff); delay_us(10); ADCSRA|=0x40; //START THE CONVERSION while ((ADCSRA & 0x10)==0); // wait for the conversion to complete ADCSRA|=0x10; //clear the ADC flag return ADCW; } Q: Whats the meaning of "ADMUX=adc_input | (0x00 & 0xff)" ? which input channel we have selected here ?

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• Android: Using GEO uri

  - by Sebastian

  Hi, I have read the doc and some tutorials to get a .kml file working launching the google maps activity. When I hosted the file in a server, this works perfectly: Intent myIntent = new Intent( android.content.Intent.ACTION_VIEW, Uri.parse("geo:0,0?q=http://somedomain.com/file.kml") ); Now, reading this link on how to use intents for gmaps with the developing stage of GEO uri I can't manage how to load a kml file from within the device, I have tried with "q=file:///path-to-file.kml" and with an absolute path too. Has anyone done this yet? PS: in IRC channel recommend me to use apps based on openstreetmaps, but the docs is much more poor than the gmaps doc althought they are OS.

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• TCP and UDP are using different OS Buffer?

  - by Jack

  HI all. Here is the scenario. I have port 8888 for my program to use. I build a TCP and a UDP listener on that port. (This can do, c# allows, because they are two different protocols) My question is If the network traffic is very busy, TCP sockets may refuse or signalling the other end to stop sending things, it is called congestion control, right? So if TCP is congestion controlling, other ends may not send more data, in this "TCP quiet period", UDP channel should have not that much of traffic, right? I want to figure out the TCP traffic will affect UDP traffic or not?

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• Fatsest way to edit alpha of CGImage (or UIImage) with touch and then display?

  - by Pankaj

  I have two image views, one on top of the another, with two different images. As the user touches the image and moves his/her finger, the top image should become transparent along the touch points with a fixed radius. (Like the PhotoChop app). Currently I am doing it this way... For each touch. Get a copy of the image buffer from CGImage of the top image. Edit the alpha channel of the buffer to create a transparent circle centered at the touch point. Create new CGImage from the buffer. Create UIImage from the CGImage and use the new UIImage as the top image view's image. This works but as you can see too many copy, creates are involved and it is slow. Can somebody please suggest me a faster way of doing the same thing?

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• What's the most effective way to interpolate between two colors? (pseudocode and bitwise ops expecte

  - by navand

  Making a Blackberry app, want a Gradient class. What's the most effective way (as in, speed and battery life) to interpolate two colors? Please be specific. // Java, of course int c1 = 0xFFAA0055 // color 1, ARGB int c2 = 0xFF00CCFF // color 2, ARGB float st = 0 // the current step in the interpolation, between 0 and 1 /* Help from here on. Should I separate each channel of each color, convert them to decimal and interpolate? Is there a simpler way? interpolatedChannel = red1+((red2-red1)*st) interpolatedChannel = interpolatedChannel.toString(16) ^ Is this the right thing to do? If speed and effectiveness is important in a mobile app, should I use bitwise operations? Help me! */

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• Couchbase (ex. membase) solution to dump all keys in a bucket

  - by j99

  I was googling around and found various python + tap solutions that should enable me to dump all keys from a bucket but none of them worked for me. I have a bucket at port 11230 and I need to get a dump of all keys in order to fill them into sphinx search engine. If I execute: # python /opt/couchbase/lib/python/tap_example.py 127.0.0.1:11230 I get the following output: info: New bin connection from None error: uncaptured python exception, closing channel <tap.TapConnection connected at 0x7f5d287184d0> (<type 'exceptions.AssertionError'>: [/usr/lib/python2.6/asyncore.py|read|78] [/usr/lib/python2.6/asyncore.py|handle_read_event|428] [/opt/couchbase/lib/python/mc_bin_server.py|handle_read|325]) this error is the same even if I try some other host or port. I also tried many other python scripts that I found on forums and groups but all of them produced the same error. My primary development environment includes PHP & Perl on Debian linux box but I will take any solution that would just dump all the keys into plain text file. Thank you for any help!

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• alias some columns names as one field in oracle's join select query

  - by Marecky

  Hi We are developing something like a social networking website. I've got task to do 'follow me' functionality. In our website objects are users, teams, companies, channels and groups (please don't ask why there are groups and teams - it is complicated for me too, but teams are releated to user's talent) Users, teams, channels, companies and groups have all their own tables. I have a query which gets me all the follower's leaders like this select --fo.leader_id, --fo.leader_type, us.name as user_name, co.name as company_name, ch.title as channel_name, gr.name as group_name, tt.name as team_name from follow_up fo left join users us on (fo.leader_id = us.id and fo.leader_type = 'user') left join companies co on (fo.leader_id = co.user_id and fo.leader_type = 'company') left join channels ch on (fo.leader_id = ch.id and fo.leader_type = 'channel') left join groups gr on (fo.leader_id = gr.id and fo.leader_type = 'group') left join talent_teams tt on (fo.leader_id = tt.id and fo.leader_type = 'team') where follower_id = 83 I need to get all fields like: user_name, company_name, channel_name, group_name, team_name as one field in SELECT's product. I have tried to alias them all the same 'name' but Oracle numbered it. Please help :)

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• Visual Studio Publish using Web Deploy gives SSL Exception?

  - by user1267778

  Im trying to use Web Deploy with arvixe hosting. I enabled Publishing with the host but I get SSL exception when I hit publish. Is anybody familiar with the following exception: Error 59 Web deployment task failed.(Could not complete the request to remote agent URL 'https://yew.arvixe.com:8172/msdeploy.axd?site=mywebsite.com'.) Could not complete the request to remote agent URL 'https://yew.arvixe.com:8172/msdeploy.axd?site=mywebsite.com'. The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. The remote certificate is invalid according to the validation procedure. 0 0 myapplication_MVC4 Thanks

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• Efficient multiple services exposed over c# .NET remoting using more channels or end points?

  - by wb

  I am using remoting over TCP for a prototype distributed server application where I want to have varying multiple services exposed from each remoting server process. In some cases I want the services running from the same process but I don't want whatever is using the service to care about that. I am wondering is it more efficient to have multiple services in the same process going over the same remoting channel distinguished by endpoint URI/URL or should I be creating new channels on different ports for each service in the same process? Using up ports isn't so much of a problem as the number of services will be low and the network and machine configuration is completely controlled. Also its not clear to me if remoting sends the URI string for every single message or just at connection time, and whether if the remoting framework is intelligent enough to reduce work if calls are made on the same machine and even the same process? Thanks in advance.

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• WCF: Callback is not asynchronous

  - by Aquarius

  Hi, I'm trying to program a client server based on the callback infrastructure provided by WCF but it isn't working asynchronously. My client connects to the server calling a login method, where I save the clients callback channel by doing MyCallback callback = OperationContext.Current.GetCallbackChannel() After that the server does some processing and uses the callback object to communicate with the client. All this works, the problem resides on the fact that even though I've set the method in the OperationContract as IsOneWay=true, the server still hangs when doing the call to the client. I've tested this by launching the server for debug in the visual studio, detaching it, launching the client, calling the above mentioned login method, putting a break point in the implemented callback method of the client, and making the server send a response to the client. The server stops doing what it's supposed to do, waiting for the response of the client. Any help is appreciated.

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• Shared WCF client code between .NET and Silverlight apps?

  - by Eduardo Scoz

  I'm developing a .NET application that will have both a WinForms and a Silverlight client. Although the majority of code will be in the server, I'll need to have quite a bit of logic in the clients as well, and I would like to keep the client library code the same. From what I could figure out so far, I need to have two different project types, a class library and a Silverlight class library, and link the files from one project to the other. This seems kind of lame, but it works for simple code. My problem, though, is that the code generated by the SVCUtil.exe to access WCF services is different from the code generated by the slsvcutil.exe, and the silverlight code is actually incompatible with the .NET one: I get a bunch of problems with the System.ServiceModel.Channel classes when I try to import the class into .NET. Has anybody done anything similar to this before? What am I doing wrong?

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• Hiredis waiting for message

  - by Vivek Goel

  I am using hiredis C library to connect to redis server. I am not able to figure out how to wait for new messages after subscribing to new message. My code look like: signal(SIGPIPE, SIG_IGN ); struct event_base *base = event_base_new(); redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379); if (c->err) { /* Let *c leak for now... */ printf("Error: %s\n", c->errstr); return 1; } redisLibeventAttach(c, base); redisAsyncSetConnectCallback(c, connectCallback); redisAsyncSetDisconnectCallback(c, disconnectCallback); redisAsyncCommand(c, NULL, NULL, "SET key %b", argv[argc - 1], strlen(argv[argc - 1])); redisAsyncCommand(c, getCallback, (char*) "end-1", "GET key"); redisAsyncCommand(c, getCallback, (char*) "end-1", "SUBSCRIBE foo"); Now how to tell hiredis to wait for message on channel ?

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• Android: Is decreasing size of .png files have some effect to resulted Bitmap in memory

  - by nahab

  I'm writing game with a large amount of .png pictures. All worked fine. Than I added new activity with WebView and got memory shortage. After that I made some experiment - replace game .png images with ones that just fully filled with some color. As result memory shortage had gone. But I suppose that Bitmap internally hold each pixel separately so such changes should have no effect. Maybe this because of initial images have alpha channel and my test images have not it? But actually question is: Will decreasing .png images files sizes make some effect on decreasing usage of VM application heap or not?

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• NetNamedPipe: varying response time when communication is idling

  - by Sven Künzler

  I have two WCF apps communicating one-way over named pipes. All is nice, except for one thing: Normally, the request/response cycle takes zero (marginal) time. However, if there was a time span of, say, half a minute without any communication, the request/response increases up to ~300-500ms. I looked around the net and I got the idea of using a heart beat/ping mechanism to keep the communication channel busy. Using trial and error I found that when doing a request each 10 seconds, the response times stay low. Starting at around 15s intervals, the "hiccup" response times begin to appear. Now I'm wondering where this phenomenon is originating from. I tried setting alle conceivable timeouts on both sides to 1 minute, but that did not help. Can anybody explain what's going on there?

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• Invalid ADTS sampling_frequency_index and channel_configuration why?

  - by Moto

  Hello all, I hope someone can direct me on the right path before I put a lot of time and effort on this. I'm currently trying to parse an AAC+ frame to get information such as number of channels and sample frequency. So it seems that we can simply get this information from the ADTS header but most of the time this information is inaccurate. So the question is: -Why is this data inaccurate? What is the meaning of the ADTS header channel and sample freq? Should I rely on it? -Should I parse further down the frame to get this information? FYI, the AAC+ raw data is coming from streaming servers... Thanks for the help! -Moto

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• WCF net.tcp server disconnects - how to handle properly on client side?

  - by RoastedBattleSquirrel

  I'm stuck with a bit of an annoying problem right now. I've got a Silverlight 4 application (which runs OOB by default). It uses WCF with net.tcp as means of communicating with the server. The client uses a central instance of the wcf client proxy. As long as everything keeps running on the server side, everything's fine. If i kill the server in the middle of everything, i drown in an avalanche of exceptions on the client side (connection lost, channel faulted etc etc). Now i'm looking for a way to handle this in a clean and centralized way (if centralized is possible). The SL app has one central client object sitting in App.cs (public static MyClient Client { get;set;}), which gets initialized on application start. Any idea how to properly handle any connectivity problems on the client object?

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• Visual C++ 2008 Intellisense is not displaying DocXml comments

  - by DavidTM

  In Visual C++ 2008, I have documented a method with DocXML: /// <summary>Function to generate and map channel.</summary> /// <param name="a_cfi">Raw CFI (1, 2 or 3)</param> /// <param name="a_ns">Slot number in frame</param> static void myFunc(unsigned a_cfi, unsigned a_ns); Intellisense displays this, but it displays the actual tags (i.e. precisely as shown above) instead of recognizing the tags and formatting the text accordingly. How can I fix this please?

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