Video decoding between pi and windows using netcat and TCP

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VS2012

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i want to save and decode a video slice from a live video stream sent from my raspberry pi to windows PC via TCP/IP using raspivid and netcat.

i run my pi code 1st. i get the video displayed on my pi screen.
but when i run the client, i get an error "Connection to server failed"
I am confused in how do acheive the same.

when i use the command
nc -l 5001 i get a connection from the server to the client. but when i use the netcat command on the raspberry pi, then i am getting a issue

What I have tried:

on the pi side i am using a a standard netcat code:

raspivid -t 0 -o - | nc 172.16.26.32 5001 (my windows pc address and the port number)

on the Windows side, i have used

C++

int main(int argc, char* argv[])
{
        WSADATA wsaData = {0};
	WORD wVer = MAKEWORD(2,2);
         int nRet = WSAStartup( wVer, &wsaData );

        WORD WSAEvent = 0;
	WORD WSAErr = 0;
	SOCKET hServer = {0};
 
    hServer = socket( AF_INET, SOCK_STREAM, IPPROTO_IP );
    sockaddr_in saServer = {0};
    saServer.sin_family = PF_INET;
    saServer.sin_port = htons( 5001 );
    saServer.sin_addr.s_addr = inet_addr( "172.16.26.92" ); //address of raspberry pi

    nRet = connect( hServer, (sockaddr*)&saServer, sizeof( sockaddr ) );
    if( nRet == SOCKET_ERROR ) 
	{
		cout << "Connection to server failed" << endl;
         }	
	else
               do
	       {
		        stat = recv(socket, (char*)&imsize, sizeof(imsize),0);
	       }while(stat<2040); //the reason i used a sat value as finite is because i am reading a slice of data from a live video stream.

Posted 12-May-16 2:46am

violence666

Updated 12-May-16 12:35pm

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Albert Holguin · Accepted Answer · 2016-05-12T12:35:00

Solution 1

C#

raspivid -t 0 -o - | nc 172.16.26.32 5001 (my windows pc address and the port number)

Seems like you're running this as a client...

C++

nRet = connect( hServer, (sockaddr*)&saServer, sizeof( sockaddr ) );
if( nRet == SOCKET_ERROR )
{
    cout << "Connection to server failed" << endl;
     }

Seems like you're running this as a client...

You have to make one side the server and the other the client, otherwise you have two clients and no servers.

Posted 12-May-16 12:35pm

Albert Holguin

Comments

violence666 17-May-16 3:57am

Thank you so much. I made the raspberry pi as the server by simply
<pre lang="c++">raspivid -t 0 -o - | nc -l 5001 </pre>
where "-l" listens to the port 5001 and sends data as soon as it senses a connection.

On the client side, i replaced

<pre lang="c++">do
{
stat = recv(socket, (char*)&imsize, sizeof(imsize),0);
}while(stat<2040);</pre>

with
<pre lang="c++">do
{
stat = recv(socket, (char*)&imsize, sizeof(imsize),0);
}while(stat<0);</pre>

when stat is equal to 0, then the client infinitely receives the server data