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• x264 IDR access unit with a SPS and a PPS

  - by Gcoop

  Hi All, I am trying to encode video in h.264 that when split with Apples HTTP Live Streaming tools media file segmenter will pass the media file validator I am getting two errors on the split MPEG-TS file WARNING: Media segment contains a video track but does not contain any IDR access unit with a SPS and a PPS. WARNING: 7 samples (17.073 %) do not have timestamps in track 257 (avc1). After hours of research I think the "IDR" warning relates to not having keyframes in the right place on the segmented MPEG-TS file so in my ffmpeg command I set -keyint_min 1 to ensure keyframes where at every frame, but this didn't work. Although it would be great to get an answer, if anyone can shed any light on what a "IDR access unit with a SPS and a PPS" is or what the timestamps warning means I would be very grateful, thanks.

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• VS2010 add-in custom menu item in files of Solution Explorer

  - by NewProgrammer

  Hey guys, I need to create a custom menu item for Visual Studio 2010 Add-in in C#, but I have had no luck in coming with a solution anytime soon. I am aware that there was a similar post: http://stackoverflow.com/questions/2486818/visual-studio-add-in-adding-a-context-menu-item-to-solution-explorer But it did not help, as the blog follows the process through the integration package, and the video is done through VB. I had attempted to convert the VB syntax to the C# syntax, but about half way through the video, the Add-in methods has significantly changed from 2005 to 2010, as some of the methods have removed or changed. Is there any good tutorials on making a custom menu item on the Solution Explorer in the lastest Visual Studio in C#, and is there a good website that could be used as a reference for looking over the VS add-in API? I've used Microsoft's main website, however it is confusing and wordy, which is difficult to understand and find the methods, properties, or commands that I am looking for. Any help would be appreicated, Thanks in advance.

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• Android stream to Wowza

  - by Curtis Kiu

  I feel very confused about Android streaming to wowza. I am doing a video conference using rtmp cross-platform, but Android doesn't eat RTMP. Therefore I need to find another way to do it. Upstreaming I found a new open-source app called spydroid-ipcamera. It is using rtp, sending udp packets to computer, and opens it in vlc using the following sdp v=0 s=Unnamed m=video 5006 RTP/AVP 96 a=rtpmap:96 H264/90000 a=fmtp:96 packetization-mode=1;profile-level-id=420016;sprop-parameter-sets=Z0IAFukBQHsg,aM4BDyA=; But it can't work. Then I follow wowza tutorial and stream to it and then play again in VLC. That works! I wrote it in http://code.google.com/p/spydroid-ipcamera/issues/detail?id=2 However when I want to add audio in the packet, it fails to work. I change to code in http://code.google.com/p/spydroid-ipcamera/source/browse/trunk/src/net/mkp/spydroid/CameraStreamer.java mr.setAudioSource(MediaRecorder.AudioSource.MIC); mr.setVideoSource(MediaRecorder.VideoSource.CAMERA); mr.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); mr.setVideoFrameRate(20); mr.setVideoSize(640, 480); mr.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); mr.setVideoEncoder(MediaRecorder.VideoEncoder.H264); mr.setPreviewDisplay(holder.getSurface()); Then I thought that the problem should be in sdp, but I don't know how to due with sdp. I am streaming H.264/AAC with Mp4 Second I don't understand sdp. So how can I make video conference upstreaming part using this apps. Android ----(UDP Port:5006)----> PC (SDP file) and then Wowza read the SDP file ------> VLC I think in this way the system cannot handle more than 1 client. sdp can only hold 1 port, any idea or actually it wont' work? Also Wowza need to set the stream before we stream it, so does it mean that I should not follow this way to do it? Sorry my English is poor, I hope you guys understand.

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• ipad vide format

  - by Mike

  When you use iTunes to sync your videos with the iPhone the videos are always saved with no more than 640 pixels wide, if I am not wrong. What about the iPad? What is the size of videos iTunes syncs with iPad? 1024x768? and what if the video has a dimension below 1024x768? Will it scale up? or will it keep the video at low res and scale when you play? thanks.

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• MediaElement.Position behaviour and Windows Phone 7 issue

  - by RoguePlanetoid

  I have a problem, I have written a simple Media Player for Windows Phone 7 and can Play, Stop and control the Volume of a Video (loaded from a URI) however when I try to set the position, this causes the application to freeze. I have used both these lines, but either does not work: Player.Position = new TimeSpan(0, 0, 0, 0, (int)Position.Value); Player.Position = TimeSpan.FromSeconds((int)(Position.Value)); I do have this event handler: void Player_MediaOpened(object sender, RoutedEventArgs e) { Position.Maximum = Player.NaturalDuration.TimeSpan.TotalMilliseconds; } And have tried using the Seconds value, casting to Ints etc, however everytime I try to set the Position, the app freezes. The video otherwise plays normally - anyone know what the problem may be here?

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• Should I use vnd.youtube:videoID?

  - by Felix

  While playing around with the emulator, I noticed that when trying to view a YouTube video the browser gives an error saying it can not load the page at vnd.youtube:ngc978y6rCU?some=parameters. I don't have an Android device, but by this I can suppose that launching a VIEW intent with the data URI set to vnd.youtube:VIDEO_ID would launch the default YouTube application and watch that video. Now, my application has to be able to display YouTube videos. Right now I have a custom-made YouTube activity which does just that, but I'm thinking of: Removing my custom activity and just launching a VIEW intent with a vnd.youtube:VIDEO_ID Uri, or Testing whether that Intent is available and using it, or, if it's not available, using my custom activity. Is this a good idea? Does this work at all (as I said I have no Android device, I'll just be borrowing one from a friend to test my final application)? Which way should I go?

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• cannot evaluate expression because a native frame is on top of the call stack and system.accessviolationexception

  - by Joseph

  I have this code using c#. public partial class MainForm : Form { private CvCapture VideoCapture; private IplImage frame; private IplImage imgMain; public MainForm() { InitializeComponent(); } private void btnVideo_Click(object sender, EventArgs e) { double vidWidth, vidHeight; try { VideoCapture = highgui.CvCreateCameraCapture(0); } catch (Exception except) { MessageBox.Show(except.Message); } if (btnVideo.Text.CompareTo("Start Video") == 0) { if (VideoCapture.ptr == IntPtr.Zero) { MessageBox.Show("badtrip ah!!!"); return; } btnVideo.Text = "Stop Video"; highgui.CvSetCaptureProperty(ref VideoCapture, highgui.CV_CAP_PROP_FRAME_WIDTH, 640); highgui.CvSetCaptureProperty(ref VideoCapture, highgui.CV_CAP_PROP_FRAME_HEIGHT, 480); highgui.CvQueryFrame(ref VideoCapture); vidWidth = highgui.cvGetCaptureProperty(VideoCapture, highgui.CV_CAP_PROP_FRAME_WIDTH); vidHeight = highgui.cvGetCaptureProperty(VideoCapture, highgui.CV_CAP_PROP_FRAME_HEIGHT); picBoxMain.Width = (int)vidWidth; picBoxMain.Height = (int)vidHeight; timerGrab.Enabled = true; timerGrab.Interval = 42; timerGrab.Start(); } else { btnVideo.Text = "Start Video"; timerGrab.Enabled = false; if (VideoCapture.ptr == IntPtr.Zero) { highgui.CvReleaseCapture(ref VideoCapture); VideoCapture.ptr = IntPtr.Zero; } } } private void timerGrab_Tick(object sender, EventArgs e) { try { frame = highgui.CvQueryFrame(ref VideoCapture); if (frame.ptr == IntPtr.Zero) { timerGrab.Stop(); MessageBox.Show("??"); return; } imgMain = cxcore.CvCreateImage(cxcore.CvGetSize(ref frame), 8, 3); picBoxMain.Image = highgui.ToBitmap(imgMain, false); cxcore.CvReleaseImage(ref imgMain); //cxcore.CvReleaseImage(ref frame); } catch (Exception excpt) { MessageBox.Show(excpt.Message); } } } The problem is after i break all and step through the debugger the program stops at a certain code. the code where it stops is here: frame = highgui.CvQueryFrame(ref VideoCapture); the error is that it says that cannot evaluate expression because a native frame is on top of the call stack. and then when i try to shift+F11 it. there is another error saying that system.accessviolationexception. the stack trace says that: at System.Runtime.InteropServices.Marshal.CopyToManaged(IntPtr source, Object destination, Int32 startIndex, Int32 length) at CxCore.IplImage.get_ImageDataDb()

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• Android V4L or V4L2

  - by Walidix

  Does Android Linux Kernel support V4L or V4L2 (Video for Linux). If not, it'is possible to add it

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• Why can't I see the 'dataset project' property in Visual Studio DataSet designer?

  - by Ryan

  Hi, I am trying to follow 'n tier app design' tutorials and they tell me to set the DataSet Project property from the Data Set Designer in VS, to split table adaptors and entities into seprate projects. I can't see that property! (I'm looking in the same place shown on the videos... all other properties match) Does anybody know why? The video is here http://windowsclient.net/learn/video.aspx?v=14625 (4:36 is where the property is set) I'm using VS c# 2008 Express, with SQL Server Express 2008. Thanks a lot for any help Ryan

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• Adobe Flash player Secuirty Pop-Up question

  - by kapildalwani

  I am building a Audio Recording tool using Flash and Wowza. I dont want to start the recording until the use clicks the Allow Button is the Security Pop-up question represented here http://www.macromedia.com/support/documentation/en/flashplayer/help/help05.html In Audio I dont get this until I attach the stream to it. In Video can get thsi question when I attach the camera to Video. I want to avoid making a connection until the user clicks Accept and this doesn't happen until I make the connection request in Audio. I am able to display the http://www.macromedia.com/support/documentation/en/flashplayer/help/help09.html pop-up using SecurityManager Is there a way I can call the pop-up from my code. http://www.macromedia.com/support/documentation/en/flashplayer/help/help05.html

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• Office Communicator Auto Accept Calls with C# API

  - by Dennis

  Is there a way to automatically accept calls programmed with the C# Api when someone calls 'me' to start a video call? Starting a video call with the API is easy: var contactArray = new ArrayList(); contactArray.Add("[email protected]"); object[] sipUris = new object[contactArray.Count]; int currentObject = 0; foreach (object contactObject in contactArray) { sipUris[currentObject] = contactObject; currentObject++; } var communicator = new Messenger(); communicator.OnIMWindowCreated += new DMessengerEvents_OnIMWindowCreatedEventHandler(communicator_OnIMWindowCreated); IMessengerAdvanced msgrAdv = communicator as CommunicatorAPI.IMessengerAdvanced; if (msgrAdv != null) { try { object obj = msgrAdv.StartConversation(CommunicatorAPI.CONVERSATION_TYPE.CONVERSATION_TYPE_VIDEO, sipUris, null, "Conference Wall CZ - Conversation", "1", null); } catch (COMException ex) { Console.WriteLine(ex.Message); } } But on the other side i want to automatically accept this call....

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• Testing MPMoviePlayerViewController in iPad simulator

  - by hgpc

  I have a view that shows a MPMoviePlayerViewController modally. When testing it in the iPad simulator it works well on the first try. If I dismiss the video and then show the view again, the player only plays the audio, but not the video. Is this a simulator quirk or am I doing something wrong? Here's my code: - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; MPMoviePlayerViewController* v = [[MPMoviePlayerViewController alloc] initWithContentURL:url]; [[NSNotificationCenter defaultCenter] addObserver:self selector: @selector(playbackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:v.moviePlayer]; [self presentMoviePlayerViewControllerAnimated:v]; [v release]; } -(void) playbackDidFinish:(NSNotification*)aNotification { MPMoviePlayerController *player = [aNotification object]; [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:player]; [player stop]; [self dismissMoviePlayerViewControllerAnimated]; }

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• How do I render 3d model into directshow virtual camera output

  - by Mr Bell

  I want to provide a virtual webcam via DirectShow that will use the video feed from an existing camera running some tracking software against it to find the users face and then overlay a 3d model oriented just that it appears to move the users face. I am using a third party api to do the face tracking and thats working great. I get position and rotation data from that api. My question is whats the best way to render the 3d model and get into the video feed and out to direct show? I am using c++ on windows xp.

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• What is the best software to capture full-screen 3h programming session in Windows?

  - by Hugo S Ferreira

  Hi, I'm planning a laboratorial experiment to assess behavior of groups when programming using some tools under study. For that, I'll need to capture their entire screen to disk. Mostly, what will be displayed is code, so I'm not to worried with image quality. However, it's paramount that the team is not able to stop the recording by accident, and the tool should be rebust enough to hold at least 3h of video. If possible, it would be nice for researchers in other rooms to "watch" the video as it is recording. Actually, this last requirement reminded me that I could use a VNC recording software, and install a VNC client in each laboratory computer. Anyway, what is your experience with this? Which software do you recommend? Thanks.

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• Simple .NET webcam library

  - by Vegard Larsen

  Is there a simple library for .NET that has a simply API that let's you do something like; // pseudo-code List<Webcam> cams = Webcam.GetAll(); Image i = cams[0].GrabImage(); I've looked at DirectShow and WIA, both seem to be much more complicated than this. I've also looked at this CodeProject project, but it really is much more complicated than what I need. The library should support image grabbing and video grabbing, and preferably live streaming of video. Edit: It is preferable if it is free (or at least very cheap), as this is a hobby project.

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• Skip sanitization for videos in html5lib

  - by pug

  I am using a wmd-editor in django, much like this one in which I am typing. I would like to allow the users to embed videos in it. For that I am using the Markdown video extension here. The problem is that I am also sanitizing user input using html5lib sanitization and it doesn't allow object tags which are required to embed the videos. One solution could be to check the input for urls of well-known video sites and skip the sanitization in those cases. Is there a better solution?

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• Java dropping half of UDP packets

  - by Andrew Klofas

  Greetings, I have a simple client/server setup. The server is in C and the client that is querying the server is Java. My problem is that, when I send bandwidth-intensive data over the connection, such as Video frames, it drops up to half the packets. I make sure that I properly fragment the udp packets on the server side (udp has a max payload length of 2^16). I verified that the server is sending the packets (printf the result of sendto()). But java doesn't seem to be getting half the data. Furthermore, when I switch to TCP, all the video frames get through but the latency starts to build up, adding several seconds delay after a few seconds of runtime. Is there anything obvious that I'm missing? I just can't seem to figure this out. Thanks, Andrew

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• visual studio 2010 database project, is there a visual way?

  - by b0x0rz

  started a visual studio 2010 database project. however i am only able to write sql in a text mode, there is no functionality in making the table for example in a visual view as exists when you add a new database to app_data folder and the work on it there. is this the only way and there is no visual way of doing this in the visual studio 2010 database project? or am i missing some obvious way of getting to it? thank you also if there is a tutorial anywhere (video maybe!?) please link it. i only found importing a database from an existing script video using a wizard. would like new database from scratch without wizard.

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• iphone: how to do Page turning

  - by srnm12

  hi frnds, I am facing the problem from a month and didn't find anything from google.. I am using UIView for pdf display. there is no problem with pdf but problem is with transition. I have to turn each page of pdf with realistic page turn exp. I search, dig a lot about that but i didn't get anything that how to do that. I don't want to use any API'S like codeflake or any other. all i want to do this by my own programming. First i read that this can be done using cocos2d or CAAnimation but i want to know how? b'coz realistic page i think so is completely 3d concept. Let me know guys how to do thay?? here's the example video: http://www.youtube.com/watch?v=oknMWvRO2XE I want animation just like in video....

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• Enunciate http error 404

  - by malakan

  Hi, I tried to setup a simple project with spring and enunciate+jax-ws/jax-rs annotation, but I didn't get it work. I used some great tutorial for the enunciate integration tutorial as template: http://docs.codehaus.org/display/ENUNCIATE/A+Rich+Web+service+API+for+your+favorite+framework Enunciate create the api-page like in the tutorial, but I get this error : If I open a mount point, for example the REST one (/rest/Service/getService/1), I'll get a 404-Error: NOT_FOUND Here is sample of my code : pom.xml: <plugin> <groupId>org.codehaus.enunciate</groupId> <artifactId>maven-enunciate-spring-plugin</artifactId> <version>1.19</version> <configuration> <configFile>src/main/webapp/WEB-INF/enunciate.xml</configFile> </configuration> <executions> <execution> <goals> <goal>assemble</goal> </goals> </execution> </executions> </plugin> enunciate.xml: <api-classes> <include pattern="com.myProject.model.*"/> <include pattern="com.myProject.services.MyService"/> <include pattern="com.myProject.services.MyServiceImpl"/> </api-classes> <webapp mergeWebXML="web.xml"/> <modules> <docs docsDir="api" title="myApp API"/> <spring-app> <springImport file="spring/applicationContext-config.xml"/> </spring-app> </modules> my service : package com.myProject.services; import java.util.List; import javax.jws.WebService; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam; import com.myProject.model.*; @WebService public interface MyService { @GET @Path("getService/{id}") public Service getService(@PathParam(value = "id")Integer id); } MyServiceImpl: package com.myProject.services; import javax.jws.WebService; ...(all import) import javax.persistence.EntityManager; @Service @Path("/Service") @WebService (endpointInterface="com.myProjects.services.MyService") @RemotingDestination(channels={"my-amf"}) public class MyServiceImpl implements MyService { private final Log logger = LogFactory.getLog(getClass()); @Autowired private MyServiceDao myServiceDao ; /*@Inject private MyServiceDao myServiceDao ;*/ public Service getService (Integer id) { return myServiceDao.getService (id); } } and I put @XmlRootElement on the model. I have tried several configuration, I couldn't get the xml or json response...just 404. Doesn't anyone know what is wrong?

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• Keep Windows Mobile 6 phone alive in C#

  - by QAH

  Hello! I am making an application for Windows Mobile 6.1 Pocket PC (Touchscreen). I know when a Pocket PC's screen turns off, it goes into a standby mode and applications are pretty much halted in the background. My application can't do that. It needs to keep going. So my question is, how can I keep the phone alive (backlight turned on) until my application is done? An example of this would be video streaming applications such as Youtube. It keeps the phone on while the video is playing. Thanks

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• OpenNETCF DirectShowPlayerControl display is going black randomly when playing videos if the player

  - by Sundar

  I have a application that runs on touch enabled device with WinCE 3.5 OS. I have a show player control to display adds when the system is left idle for some configured amount of time.. So the DirectShowPlayerControl will be iniated every time the show player is launched and will be destroyed when it is closed... The player for the first time plays videos continuously for any amount of time. Once the player is destroyed and recreated the video are changing but the display goes black and in between if some small video is placed that alone is displayed. Whenever the form is closed am calling DirectShowPlayerControl.Dispose() method.

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• Programming an Event listener for files in a directory on Linux

  - by Epitaph

  On Ubuntu linux, when you watch a flash video, it gets saved temporarily in the /tmp as flv files while the video buffers. I use vlc to directly play these files. Currently, I have scripted a shortcut that directly scans and opens the latest file in /tmp with vlc, when clicked. But, I want to program a Java application that will continually monitor this /tmp directory for any new flv files, and open it in vlc automatically. I know I can use Runtime.exec() to open the VLC application with the flv files. But, I DO NOT want to run a while(true) loop (with sleep) to scan for files. How can I make use of Event Handling (Java or any other language) on Linux to complete this task?

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• Using a regex to determine domain using JavaScript

  - by jerome

  Hi All, If, as here at work, we have test, staging and production environments, such as: http://test.my-happy-work.com http://staging.my-happy-work.com http://www.my-happy-work.com I am writing some javascript that will redirect the browser to a url such as: http://[environment].my-happy-work.com/my-happy-video I need to be able to determine the current environment that we are in. There is the possibility that I will currently be at a url such as: http://[environment].my-happy-work.com/my-happy-path/my-happy-resource I want to be able to grab the window.location but strip it of everything but: http://[environment].my-happy-work.com And then append to that string + "/" + "my-happy-video". I am not skilled with regex, but I suppose there would be a way to parse the window.location up to the ".com" Thoughts? Thanks!

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• NSXMLParser, Issue with ASCII Character Set

  - by Ansari

  Hi all <Feeds> <channel> <ctitle>YouTube</ctitle> <cdescription>YouTube - Recently added videos</cdescription> <items> <recentlyAdded> <item> <serverItemId>1</serverItemId> <title>Fan Video CARS</title> <author>mikar1</author> <guid isPermaLink='false'></guid> <link>http://www.youtube.com/watch?v=y7ssHOBFvGk&amp;feature=youtube_gdata</link> <pubDate></pubDate> <description> <descriptionTitle>Fan Video CARS</descriptionTitle> <descriptionText>THE REALSONG OF THIS VIDEOS IS REAL GONE, BUT FOR COPYRIGHTS RASONS.....YOUTUBE FORCE ME A CHANGE THE SONG :s Un pequeño video, de la pelicula Cars!</descriptionText> <added></added> <airDate></airDate> <duration></duration> <Views></Views> <ratings>4.340909</ratings> <From></From> </description> <thumbnail> <height>100</height> <width>100</width> <url>http://i.ytimg.com/vi/y7ssHOBFvGk/2.jpg</url> </thumbnail> </item> </recentlyAdded> </items> </channel> I am using NSXMLParser, and when it reaches the it blows up. It breaks the text to pieces "THE REALSONG OF THIS VIDEOS IS REAL GONE, BUT FOR COPYRIGHTS RASONS.....YOUTUBE FORCE ME A CHANGE THE SONG :s Un peque" And next should be "ño" but it just quit the parsing there and further tags are being handled. :( It always does with the ISO 8859 1 Character cames in ) Any quick idea ??? Thanks in Advance ..........

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