Stream Contents Of A WPF Form (as Frames) To An AVI File?
Apr 15, 2011
I currently send a live video mix to a output screen (a form on a particular screen).Consider it like a really advanced version of PowerPoint. I call it a video control room for the pc. I want to take 30 frames a second from a screen (of my choice, I allow multiple screens) and the audio from the computer (stereo) set, save it to a hard disks. How do I do that? I know I can draw the image of the interface using the RenderTargetBitmap class, but How do I put those images (as frames) in an AVI file or push it to a video server? An SDK? or a Code Example to point me in the right direction, would be nice! I also want to capture the sound of the current Stereo mix, or microphone (as determined by the user).
I have 1000 frames and id like to create an application that will use all those frames and create a video file. I dont care about the file format(.wmv/.avi/...). Google isnt really showing any good results. Just this: [URL] The solution is to make PictureBox and quick load the pictures and will look like Video. I need it as a video file. Where can i look? is there a built-in function in VB.Net?
On the other hand it doesnt make sence at all: id like to create an application that will use all those frames and create a video file. What will be the time difference between two frames? What about the quality? ...
I have MyReader spit the contents of a delimited file into a text box on my form. I wanted to have the program find how many times a certain string was repeated based on a comparison between the currentfield string and my encoded search string. I thought that I could use a counter for this, but I think I may be using incorrect syntax. When the program runs, the counter doesn't increment.
I want to make a screen recording program and I want to be able to add a picture to the video file every so often and the picture will be a frame. I already know how to capture the screen, so all I need to know how to do is capture a video of the screen.
in an winForm app in VS2010 win 7 compiling to x86, I try to do what Alvas.Audio seems to work. See (c# ex: [URL] for reference.
Dim data() As Byte = wr.ReadData(second * i, second)
The result give me data.length()=0. I do not have any exception, I can read format from it and whatever reader I use I got this problem.EDIT : After some tests, it seems like the uncompressed file I create in the first step (in PCM format, with .wav extension) can not be recognized by the Alvas.audio library for the second step. I must miss something around Audio file markups or something alike.
Here is the code that might be the source (basically this is step 1):
Dim functOut As String = String.Empty Dim wr As Alvas.Audio.IAudioReader = Nothing Dim fs As IO.FileStream = Nothing
[code]....
How can I write the resulted stream to be sure I can read it again later?
I don't know whether it is simple or not because i am new to programming. my requirement is : In my vb.net winform application, the filenames of the files present in "D:Project" willbe displayed in DataGridView1 control. Now I want to load these files one after another into memory stream buffer and add the headers("ID","Name","Class") to the content in the file. Then I want to save these files in "C:" with "_de" as suufix to the filename i.e.,sample_de.csv.
I am writing a backup program that zips files. Using some sample code I have the following that creates a zip file. Problem is it does not get any subdirectories or files. Where am i going wrong?
Dim azFileNames() As String = Directory.GetFiles(SourceFolder) Dim objCrc32 As New Crc32() Dim zipStream As ZipOutputStream
[CODE]...
Alternativley, there is another component to the zipping dll that I could probably bypass the above altogether. It is: FZ.CreateZip(DestFile, SourceFolder, True, "", "") Where DestFile is (Output stream as system.io.stream). I'm trying to read all the files, directories, sub dir and files, etc from a specific location, let's say 'My Documents' into Destfile in which the FZ.CreateZip zips the file. FZ is FastZip which is from icsharpcode.net. They have c# examples, but that's greek to me. I'm trying to just learn VB!
i would like to ask is there anyway to read a txt file with UTF-8 encoding using streamreader or filestream. the txt file is contain some extended ASCII that makes me cannot read the characters properly. I hav tried Encoding.ASCII.GetString(Encoding.UTF8.GetBytes()) but still it return wrong character when it's reading extended ASCII code.
Im making a desktop player for a online web radio, and for the program I wanna make it show all the stream info. Like the stream name, and such. However I dont know how to do this? I looked everywhere
The server url is setup like this "[URL]" And it has all the stream info and that there. So is there a way I can get the info from there onto like say a label? Live updates btw.
i am making a game in which the file stream gets a certain file(lets say a.txt) and it reads it, if it has certain values stored in the file it returns boolean(this is a function), then a sub procedure writes to the file using a streamwriter and a filestream using the same file. I am having problems, sometimes visual basic says that another process is using the file, this is before i closed the filestreams and the streamwriter or streamreader, then it gives me errors when i close the files, it tells me that it can't access a file that is already closed, i thought the filestream gets the file and lets the streamreader or streamwriter read or write to the filefound out the problem?
is it possible to report the percentage of file written by a file stream wile it is writing a large file?I am using a code like this one to write a large file
Using Fs As System.IO.FileStream = System.IO.File.Create(FolderPath) Dim bf As New BinaryFormatter() bf.Serialize(Fs, data) End Using
I have looked over this and can't see where i'm going wrong, all i'm trying to do is add an item to a listbox when i a tcpclient logs on to the server. Code in question... If i put a breakpoint in i can see that initialclientresponse is set correctly.
Public Sub ConnectClient() Dim pendingClient As TcpClient Dim InitialClientResponse As String
I've downloaded ZLIB.NET from here and the example VB.NET code they provide works fine. It's very short so I'll paste it here for reference:
vb Public Shared Sub CopyStream(ByRef input As System.IO.Stream, ByRef output As System.IO.Stream) Dim num1 As Integer
[Code]...
Note that the CopyStream() subroutine is identical. The problem is that although decompressing seems to work fine, compressing does not. If I take a byte stream, compress it and then decompress it using the above code, I get a truncated version of the original stream (as an example, a 360485 byte stream becomes 311518 bytes). The resulting bytes match the original stream up until the point where it's cut off.
The only information I can find about streams being truncated is due to missing stream.Flush() commands but the output stream is flushed in the CopyStream() subroutine.
I am trying to read a xml file (from a stream) like the one below. I need to read the xml element "recipientPhone" first,then I could read element "contents" so that I could save base64 data as file with the name coming from recipientPhone.I am using while xmlReader.read() to read the xml, is there a way that I could read element "recipientPhone" before "contents"?
xml sample: <fax> <clientInfo>Attachments: 2</clientInfo> <contents><contentType>0</contentType> <data>data1</data>
I have a filename(including it's path) in a string. Now i want to load this .csv file into memory stream. ex: Dim filename as string="C:UsersDesktopabc.csv"
I am developing a VB.NET 2008 application, consisting of a main EXE application and several resource DLLs.I am trouble with two functions for the DLL:
1) one function to get a list of all files in the resources of the DLL.
2) one function to return 'by name' a resource file as a System.IO.Stream type.
NOTE: The files will not be "Embedded Resource" (this doubles the size of the DLL), so I think cannot use 'GetManifestResourceStream'.
I currently use:
Return New System.IO.MemoryStream(My.Resources.MyFileName)
but I want it to be called by name.I am adding the resources using the VS 2008 "Resources" tab, from the My Project screen, I'm not manually editing Resources.resxAs I said before, it works with:
Return New System.IO.MemoryStream(My.Resources.MyFileName)
but I need to get the resources by name, which also works by using
GetMAnifestResourceStream
but this requires to set the resources Build Action to "Embedded Resource", which doubles the size of my DLL file.I currently use "None" as Build Action, but I can use any Build Action that does not increase the file size more than the actual resources size.
I am trying to write a little synthesizer program, and as a first step I am creating .wav files opened for reading and writing using the code below called from a button click event handler. The audo plays but once, no matter how many instances of the Audio.Play method are called. I also tried closing the file and then calling the Audio.Play method on the full path name. In each case, the audio plays but once. If I click the button again, the file will be played once more. The duration for the audio is one second, so I am sure that it is only being played once every time. I do not want to loop the data. The idea is that when the user plays a new note, I update the file and replay it with the new data. Since the file is recreated every time I click the button, I guess what I *need* is working, but I am still curious why I cannot replay the content of the file.
' Create a file stream object for reading and writing. Dim FS As New IO.FileStream(fileNamePath, _ IO.FileMode.Create, _
