Downloading video files with a larger size - vb.net

I have developed a movie website and I have it hosted in a private webserver.
I had also developed a windows app through which I wanna download my movies from my site.
The movies are of file size 400mb to 700mb. I tried using WebClient but it doesn't works for large file sizes.
private void btnDownload_Click(object sender, EventArgs e)
{
try
{
WebClient wb = new WebClient();
wb.Credentials = CredentialCache.DefaultCredentials;
wb.Headers.Add(HttpRequestHeader.UserAgent, "Loading");
wb.DownloadFileAsync(new Uri("http://www.mysite.com/2D MOVIES/ColdSteel.mkv"), "D:\\ren.mkv");
wb.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wb_DownloadProgressChanged);
wb.DownloadFileCompleted += new AsyncCompletedEventHandler(wb_DownloadFileCompleted);
}
catch (WebException ex)
{
MessageBox.Show(ex.InnerException.ToString());
}
}
I'm a newbie so please guide me with code snippets in what way I can make it happen. I need the whole movie to be downloaded.
Anyone know how to implement this?

Did you see this? I think it can be good and it is open source.

Related

How to take an xml response received from a web service and make it a datasource

I'm making a windows 8.1 phone app and I have a listbox that I'm trying to populate with data. My problem is that I am using a web service and I finally figured out how to get the data but it is in an xml format and I don't know how to make that into the itemssource for the listbox. I'm sorry if this is a stupid question but this is my first time doing this and I can't seem to find any information online.
Below is a very simple example which requests an XML document from a URI over HTTPS.
It downloads the XML asynchronously as a string and then uses XDocument.Parse() to load it.
private void button2_Click(object sender, RoutedEventArgs e)
{
WebClient wc = new WebClient();
wc.DownloadStringCompleted += HttpsCompleted;
wc.DownloadStringAsync(new Uri("https://domain/path/file.xml"));
}
private void HttpsCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
XDocument xdoc = XDocument.Parse(e.Result, LoadOptions.None);
this.textBox1.Text = xdoc.FirstNode.ToString();
}
}
Have a look over this thread.
Hope it helps!
If the data coming back is always the same type you can always use XmlSerializer to deserialize the data the data to a class you can bind to. If you copy a sample of the data coming back to the clip board you can use paste xml as classes to paste the class you can deserialize into
Deserialize XML in a WP8 Application

How to capture and record video from webcam using JavaCV

I'm new to JavaCV and I have difficult time finding good tutorials about different issues on the topics that I'm interested in. I've succeed to implement some sort of real time video streaming from my webcam but the problem is that I use this code snippet which I found on the net :
#Override
public void run() {
FrameGrabber grabber = new VideoInputFrameGrabber(0); // 1 for next
// camera
int i = 0;
try {
grabber.start();
IplImage img;
while (true) {
img = grabber.grab();
if (img != null) {
cvFlip(img, img, 1);// l-r = 90_degrees_steps_anti_clockwise
cvSaveImage((i++) + "-aa.jpg", img);
// show image on window
canvas.showImage(img);
}
that results in multiple jpg files.
What I really want to do is capture my webcam input and along with showing it I want to save it in a proper video file. I find out about FFmpegFrameRecorder but don't know how to implement it. Also I've been wondering what are the different options for the format of the video file, because flv maybe would be more useful for me.
It's been quite a journey. Still a few things that I'm not sure what's the meaning behind them, but here is a working example for capturing and recording video from a webcam using JavaCV:
import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.FFmpegFrameRecorder;
import com.googlecode.javacv.OpenCVFrameGrabber;
import com.googlecode.javacv.cpp.avutil;
import com.googlecode.javacv.cpp.opencv_core.IplImage;
public class CameraTest {
public static final String FILENAME = "output.mp4";
public static void main(String[] args) throws Exception {
OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);
grabber.start();
IplImage grabbedImage = grabber.grab();
CanvasFrame canvasFrame = new CanvasFrame("Cam");
canvasFrame.setCanvasSize(grabbedImage.width(), grabbedImage.height());
System.out.println("framerate = " + grabber.getFrameRate());
grabber.setFrameRate(grabber.getFrameRate());
FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(FILENAME, grabber.getImageWidth(),grabber.getImageHeight());
recorder.setVideoCodec(13);
recorder.setFormat("mp4");
recorder.setPixelFormat(avutil.PIX_FMT_YUV420P);
recorder.setFrameRate(30);
recorder.setVideoBitrate(10 * 1024 * 1024);
recorder.start();
while (canvasFrame.isVisible() && (grabbedImage = grabber.grab()) != null) {
canvasFrame.showImage(grabbedImage);
recorder.record(grabbedImage);
}
recorder.stop();
grabber.stop();
canvasFrame.dispose();
}
}
It was somewhat hard for me to make this work so in addition to those that may have the same issue, if you follow the official guide about how to setup JavaCV on Windows 7/64bit and want to capture video using the code above you should create a new directory in C:\ : C:\ffmpeg and extract the files from the ffmped release that you've been told to download in the official guide. Then you should add C:\ffmpeg\bin to your Enviorment variable PATH and that's all. About this step all credits go to karlphillip
and his post here

Trouble Attaching File Programmatically to Email in Windows Metro App C#/XAML using Share Charm

I'm simply trying to attach a file named Document.pdf in the DocumentsLibrary to an email using the Share Charm. My code below works perfectly on the Local Machine:
private async void OnDataRequestedFiles(DataTransferManager sender, DataRequestedEventArgs e)
{
List<IStorageItem> shares = new List<IStorageItem>();
StorageFile filetoShare = await Windows.Storage.KnownFolders.DocumentsLibrary.GetFileAsync("Document.pdf");
if (filetoShare != null)
{
shares.Add(filetoShare);
filetoShare = null;
}
if (shares != null)
{
DataPackage requestData = e.Request.Data;
requestData.Properties.Title = "Title";
requestData.Properties.Description = "Description"; // The description is optional.
requestData.SetStorageItems(shares);
shares = null;
}
else
{
e.Request.FailWithDisplayText("File not Found.");
}
}
But when I run the exact same code on a Windows Surface Tablet, I get the dreaded "There's nothing to share right now." on the right in the Charms flyout area.
Here's a little more background to help:
I'm not looking to use a File Picker...I know the exact file I'm looking for
I've enabled the Documents Library Capability in the manifest
I've added a File Type Association for pdf in the manifest
and yes, the file does exist and is in the Documents Library
an email account is properly setup in the Mail App on the surface
I can successfully send text emails from the Tablet...just not emails with attachments
Like I said, this works on my Win 8 Development Machine as expected...just not on the Surface. I'm wondering if the Surface has different file or folder permissions?
Thanks for the help...this is driving me CRAZY
I finally figured it out - the problem was that my Event Handler was async (so that I could use await to set the StorageFile variable).
I solved it by setting the StorageFile variable earlier in my code so that it was already available when the Event Handler was called.
I still have no idea why it worked on my development machine, but no on the WinRT surface...
The handler can be an async method. In this case, it is critical to use DataTransferManager. Please refer to the MSDN page specifically for this scenario. For your convenience, the code from the page is copied to here:
private void RegisterForShare()
{
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
dataTransferManager.DataRequested += new TypedEventHandler<DataTransferManager,
DataRequestedEventArgs>(this.ShareStorageItemsHandler);
}
private async void ShareStorageItemsHandler(DataTransferManager sender,
DataRequestedEventArgs e)
{
DataRequest request = e.Request;
request.Data.Properties.Title = "Share StorageItems Example";
request.Data.Properties.Description = "Demonstrates how to share files.";
// Because we are making async calls in the DataRequested event handler,
// we need to get the deferral first.
DataRequestDeferral deferral = request.GetDeferral();
// Make sure we always call Complete on the deferral.
try
{
StorageFile logoFile =
await Package.Current.InstalledLocation.GetFileAsync("Assets\\Logo.png");
List<IStorageItem> storageItems = new List<IStorageItem>();
storageItems.Add(logoFile);
request.Data.SetStorageItems(storageItems);
}
finally
{
deferral.Complete();
}
}
It is critical to place the following statement before any async method is called:
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
You only have half a second to get the whole job done (getting the file, attaching...etc.). If the half-second deadline occurs you'll get this "driving crazy" message. Consider implementing some resumable logic and replace the message with "the attachment is being prepared please try again in a few seconds" (or else).
Your WinRT device might be just slower than your development machine. The latter just does the job before the deadline...

Best way to extract .zip and put in .jar

I have been trying to find the best way to do this I have thought of extracting the contents of the .jar then moving the files into the directory then putting it back as a jar. Im not sure is the best solution or how I will do it. I have looked at DotNetZip & SharpZipLib but don't know what one to use.
If anyone can give me a link to the code on how to do this it would be appreciated.
For DotNetZip you can find very simple VB.NET examples of both creating a zip archive and extracting a zip archive into a directory here. Just remember to save the compressed file with extension .jar .
For SharpZipLib there are somewhat more comprehensive examples of archive creation and extraction here.
If none of these libraries manage to extract the full JAR archive, you could also consider accessing a more full-fledged compression software such as 7-zip, either starting it as a separate process using Process.Start or using its COM interface to access the relevant methods in the 7za.dll. More information on COM usage can be found here.
I think you are working with Minecraft 1.3.1 no? If you are, there is a file contained in the zip called aux.class, which unfortunately is a reserved filename in windows. I've been trying to automate the process of modding, while manipulating the jar file myself, and have had little success. The only option I have yet to explore is find a way to extract the contents of the jar file to a temporary location, while watching for that exception. When it occurs, rename the file to a temp name, extract and move on. Then while recreating the zip file, give the file the original name in the archive. From my own experience, SharZipLib doesnt do what you need it do nicely, or at least I couldnt figure out how. I suggest using Ionic Zip (Dot Net Zip) instead, and trying the rename route on the offending files. In addition, I also posted a question about this. You can see how far I got at Extract zip entries to another Zip file
Edit - I tested out .net zip more (available from http://dotnetzip.codeplex.com/), and heres what you need. I imagine it will work with any zip file that contains reserved file names. I know its in C#, but hey cant do all the work for ya :P
public static void CopyToZip(string inArchive, string outArchive, string tempPath)
{
ZipFile inZip = null;
ZipFile outZip = null;
try
{
inZip = new ZipFile(inArchive);
outZip = new ZipFile(outArchive);
List<string> tempNames = new List<string>();
List<string> originalNames = new List<string>();
int I = 0;
foreach (ZipEntry entry in inZip)
{
if (!entry.IsDirectory)
{
string tempName = Path.Combine(tempPath, "tmp.tmp");
string oldName = entry.FileName;
byte[] buffer = new byte[4026];
Stream inStream = null;
FileStream stream = null;
try
{
inStream = entry.OpenReader();
stream = new FileStream(tempName, FileMode.Create, FileAccess.ReadWrite);
int size = 0;
while ((size = inStream.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, size);
}
inStream.Close();
stream.Flush();
stream.Close();
inStream = new FileStream(tempName, FileMode.Open, FileAccess.Read);
outZip.AddEntry(oldName, inStream);
outZip.Save();
}
catch (Exception exe)
{
throw exe;
}
finally
{
try { inStream.Close(); }
catch (Exception ignore) { }
try { stream.Close(); }
catch (Exception ignore) { }
}
}
}
}
catch (Exception e)
{
throw e;
}
}

HttpWebRequest for ShoutCast on Windows Phone7

I tring to stream shoutcast stream in my window phone 7 app
I start an async HttpWebRequest like this
//Init Request
HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create("http://ACommonoShoutCastUrl:8000");
myHttpWebRequest.Headers["Icy-MetaData"] = "1";
myHttpWebRequest.UserAgent = "WinampMPEG/5.09";
myHttpWebRequest.AllowReadStreamBuffering = true;
//Call
// Create an instance of the RequestState and assign the previous myHttpWebRequest object to its request field.
RequestState myRequestState = new RequestState();
myRequestState.request = myHttpWebRequest;
// Start the asynchronous request.
IAsyncResult result = (IAsyncResult)myHttpWebRequest.BeginGetResponse(new AsyncCallback(RespCallBack), myRequestState);
The problem is that the CallBack->RespCallBack is never called...
This code worked for me normally in other environments but not on the phone...
I tired also to use WebClient that seems to stream data,
the problem in this case is that it never call the end OpenReadCompleted because of endelss shoutcast stream
Thanks for support
any help would be appreciated
SHOUTcast implements its own protocol so you can't directly access and play it. You can use DownloadStringAsync (you will need a WebClient instance for this) to download the PLS file and read the URL with the help of RegEx.
When you get the URL, you can read the raw audio data by implementing MediaStreamSource and then use a MediaElement to play the contents.
You can find a sample implementation of MediaStreamSource here.
I just put the following on a page and the callback was called in repsonse to the button click. (I set a break point on the throw statement and it was hit.)
private HttpWebRequest myHttpWebRequest;
public MainPage()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
//Init Request
//The following URI was chosen at random
myHttpWebRequest = (HttpWebRequest)WebRequest.Create("http://yp.shoutcast.com/sbin/tunein-station.pls?id=1377200");
myHttpWebRequest.Headers["Icy-MetaData"] = "1";
myHttpWebRequest.UserAgent = "WinampMPEG/5.09";
myHttpWebRequest.AllowReadStreamBuffering = true;
// Start the asynchronous request.
myHttpWebRequest.BeginGetResponse(RespCallBack, myHttpWebRequest);
}
private void RespCallBack(IAsyncResult ar)
{
throw new NotImplementedException();
}
I am trying to implement the Shoutcast streaming to my MediaElement via my own MediaStreamSource class. I have a loop in which I am downloading data from Shoutcast server and then set the data to the MediaStreamSource class - this works not perfectly for yet, but I discovered another more important issue. I made a test. I have downloaded a stream to a mp3 (stream is in mp3) file, then put this file to my application and set it to my MediaStreamSource. Here's the code for this:
private void Button_Click(object sender, RoutedEventArgs e)
{
var assembly = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceNames();
var res = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("Demo1.sample.mp3");
byte[] data = new byte[res.Length];
res.Read(data, 0, data.Length);
MemoryStream ms = new MemoryStream();
ms.Write(data, 0, data.Length);
ms.Position = 0;
ShoutcastMediaStreamSource ss = new ShoutcastMediaStreamSource(ms);
player.SetSource(ss);
}
my ShoutcastMediaStreamSource based on MenagedMediaHelpers. So when I put this stream to my ShoutcastMediaStreamSource in debbuger I can see that the method OpenMediaAsync() is called properly, then the GetSampleAsync() is called in a loop by MediaElement, here also everything is fine, but when I run this app there is no sound ! Neither on the emulator nor on the device, and there are no errors. I think, the GetSampleAsync() method is running too fast, bacause for the file (and also stream) duration is about 30 sec., and this app ends after ca. 10 sec. But nevertheless, there should be a sound (scratch).
BUT whats suprising - this app works in Silverlight as Web Page ! The music is playing. I am confused.
Here is allso an app
http://timheuer.com/blog/archive/2010/08/16/download-and-store-media-for-playback-in-windows-phone-7-using-mediastreamsource.aspx
and there is a comment:
If Mp3MediaStreamSource is set as a
source for MediaElement then
MediaElement doesn't play that file
and donesn't show any error in Windows
phone 7 sdk RTM version. In previsios
version it was working but it's not
working with Windows phone 7 sdk final
release.
The callback gets called if you disable read stream buffering:
webRequest.AllowReadStreamBuffering = false;