Transmitting video capture from server to client (Newbie)

[MrNobody]

Hi..
Attached is a code to capture a USB webcam.
If i want to use the code as a server, what do i need to add to it..?
Preferably, sending using UDP.. can somebody please advise..

After that, I want to write a client program.. but that is later..

By the way, I am new to Visual Basic, so, help is needed and appreciated.
Thanks..

[Lop]

Without downloading and looking at the code... Are you using .NET or VB 6.0?

In .NET you can use the System.Net.Sockets.UdpClient

Here is the code for the TcpClient though:

private void ConnectAndSend(String ip, String Msg, int port)
        {
            // Connect to our socket
            TcpClient msgClient;


            // Try to connect
            msgClient = new TcpClient(textBox1.Text, port);

            // Create our network stream
            NetworkStream networkStream = msgClient.GetStream();
            System.IO.StreamReader streamReader = new System.IO.StreamReader(networkStream);
            System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(networkStream);

            // Write our message
            try
            {
                streamWriter.WriteLine(Msg);
                streamWriter.Flush();
            }
            catch (System.Exception e)
            {
                MessageBox.Show(e.ToString());
            }

            // Disconnect
            msgClient.Close();

        }

[Jordan]

Lop, that looks like C# code instead of VB.

MrNobody, I've copied your post into the code section, I hope this is alright.

http://forum.codecall.net/tutorials-...sb-camera.html

[MrNobody]

Lop:
Thanks for the reply and the code...
I am using VB 6.0. Here are a few things i need help with..

1) How do I convert the VB 6 code into VB.net..?
2) How do i change the code to make it UDP instead of TCP, because i need a fast transmission.. I don't mind loosing a few frames..
3) Can I compile the code as it is or do I need to add something else to it..?
4) How do I create a server with the webcam code added to it..?

Honestly, this is the first VB 6 program i compiled... So, sorry if i ask silly questions...


Jordan:
Sure u can put the code in the code section.. I don't mind..

[Lop]

This code is ready to be compiled and ran:

http://forum.codecall.net/tutorials-...er-client.html

Just download the attachment.

1) For converting to .NET - that is harder than said.
2) Wherever you see TcpClient use System.Net.Sockets.UdpClient or just UdpClient if you have that namespace decalred.
3) Yes, if you download the attachment
4) You will need to rewrite this in .NET if you choose to use that. I suggest you create it in .NET because I couldn't find anything on vb 6 and TCP.

Here is a tutorial:
http://www.codeproject.com/vb/net/TinyUDP.asp

[MrNobody]

Lop:

I went to:-
http://forum.codecall.net/tutorials-...er-client.html

But there it said:-
"This is the client, which is not in C++ but C# .NET 2.0 for"

Is C#.Net the same as VB.net..? I am very new to .Net...

[Lop]

No, C# is not the same as VB but when using the .NET language it is very easy to port. VB and C# have all of the same classes, methods, functions, and namespaces so you just need to change the way the code is called.

I don't know VB that well so I can't give an example. Sorry.

[MrNobody]

Hi.. I managed to find a simple client/server using UDP in VB 6.0 to send message..
Below is the code.. The code is taken from

http://homepages.ius.edu/RWISMAN/B43...ram%20Services

I just change the form caption only..
Does anybody know how I can edit both the code so that I can send Webcam Stream from server to client instead of sending messages..?
Thanks..


Lop:
I tried those C# to VB.net converter tools to convert the code but it does not work.. Maybe its because of different version of VB.net.. I am using VB Express 2005.. its ok.. thanks anyway..

[dirkfirst]

I didn't even know there was a C# to VB.net converter!

I can't see the code because I don't have VB 6. Can you post the section for sending messages? It would probably be a simple matter of adding a loop and streaming the media.

[MrNobody]

Originally Posted by dirkfirst

I didn't even know there was a C# to VB.net converter!

I can't see the code because I don't have VB 6. Can you post the section for sending messages? It would probably be a simple matter of adding a loop and streaming the media.

Here is the website http://www.kamalpatel.net/ConvertCSharp2VB.aspx
I am not sure if it works tho...




Anyway, I have found a code for the client/server that capture and transmit webcam stream.
I have attached it below for those who are interested in doing it..

The code uses the code below to capture and send the stream

Private Sub TmrStream_Timer()
On Error Resume Next
TakeFrame
End Sub


Public Sub TakeFrame()
On Error Resume Next
Dim Bjpg As String
If Winsock1.State = sckConnected Then
SavePicture Picture1.Picture, App.Path & "\temp.bsrm"
Call ConvertBMPtoJPG(App.Path & "\temp.bsrm", App.Path & "\temp.jsrm", True, 100, False)
DoEvents
Bjpg = GetFile(App.Path & "\temp.jsrm")
DoEvents
Winsock1.SendData Bjpg
End If
End Sub

I think what it does is it uses the timer to capture a picture, convert it to JPEG and then sending it. Is this method effective..?

I came across other methods such as using DirectShow and AVICap..
Why different methods of doing similar tasks..? Which is the more effective way..?