If you want to use an url protocol to output your encoded media (e.g. tcp://hostname:port) follow these instructions:

 * open your favourite media format as you would open it with a file:

{{{
AVOutputformat *aof = guess_format ("avi", NULL, NULL);
}}}

 * Use url_open () instead of url_fopen () and pass it an URLContext pointer and your url :
	
{{{
url_open (url_context, "tcp://hostname:port", URL_WRONLY);
}}}

 * Use url_open_dyn_buf on ByteIOContext of your AVFormatContext
{{{
	url_open_dyn_buf (&format_context -> pb)
}}}
 * Write your header:
{{{
	av_write_header( ... )
}}}
 * Send it to your url:
{{{
guchar *pb_buffer;
int len = url_close_dyn_buf(format_context -> pb, (unsigned char **)(&pb_buffer));
url_write (url_context, (guchar *)pb_buffer, len);
}}}

Do the same with av_write_frame:

 * Use url_open_dyn_buf() on ByteIOContext of your AVFormatContext
{{{
	url_open_dyn_buf (&format_context -> pb)
}}}
 * write your header:
{{{
	av_write_frame( ... )
}}}
 * Send it to your url:
{{{
guchar *pb_buffer;
int len = url_close_dyn_buf(format_context -> pb, (unsigned char **)(&pb_buffer));
url_write (url_context, (guchar *)pb_buffer, len);
}}}