the book is NOT about gstreamer, that was a typo.<br><br><div class="gmail_quote">On Sat, Feb 25, 2012 at 6:08 PM, Michael Niemand <span dir="ltr"><<a href="mailto:michael.niemand@googlemail.com">michael.niemand@googlemail.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The protocol to do these kinda things would be SIP I think.<div>There's a book by Morgan Kaufmann called "Internet Multimedia Communications Using SIP".</div> <div><br></div><div>Its about GStreamer though, but SIP (as the title suggests). Maybe give it a try. Also check gstreamer-java if that is more your thing ...</div> <div><br></div><div>Good luck!</div><div><br></div><div><div><div class="h5"><br><br><div class="gmail_quote">On Sat, Feb 25, 2012 at 5:31 PM, Sean McNamara <span dir="ltr"><<a href="mailto:smcnam@gmail.com" target="_blank">smcnam@gmail.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br> <div><br> On Sat, Feb 25, 2012 at 12:26 AM, <<a href="mailto:gstream@ccc2.com" target="_blank">gstream@ccc2.com</a>> wrote:<br> > Hi All,<br> ><br> > I am not a C. programmer at all. I have followed the tutorials and<br> > examples and have a working videomixer2 application. Can you give advice<br> > as to how I can interact with this app on a remote linux box. I assume it<br> > is with sockets etc (telnet?). Any advice and some examples would be<br> > great.<br> <br> </div>First, this is not a gstreamer question. Just because you're *using*<br> gstreamer doesn't mean that the nature of your question is at all<br> related to gstreamer. This is a general applications programming<br> question, because the nature of your question is *networking*, not<br> *the gstreamer API*. I'm replying as a courtesy, but please keep the<br> SNR of this list high by not posting further non-gstreamer questions<br> to this list.<br> <br> This is where having some software engineering knowledge would help you.<br> <br> First of all, if you're doing this over the public internet, you need<br> an authentication mechanism for your network service. And since<br> authentication over plain text is basically the same as having no<br> authentication, you're going to need encryption, message<br> authentication, and a bunch of other things. Rather than trying to<br> design something like this from scratch, I'd suggest to just use an<br> existing solution that is secure enough that most people trust it.<br> <br> Basically, don't try to cheat by doing something simple/easy like<br> telnet, unless this service is ONLY going to listen on a LAN IP<br> address and you trust every computer that connects to that LAN.<br> Assuming you're good with using existing GNOME technology, you might<br> look at using libsoup as an HTTPS ("S" for "SSLv3" / "TLS") server.<br> Once you have an authenticated SSL or TLS tunnel with the client, you<br> can pretty much code up an arbitrary request/response protocol between<br> the client and server.<br> <br> It'd go something like this, starting at OSI layer 5 (Session):<br> <br> 0. Client establishes a TCP socket connection on port 443 (or<br> whatever) with server. (Layer 5)<br> 1. Client sends an SSL HelloRequest to server. (Layer 6)<br> 2. Client and server complete an SSL handshake to establish a secure<br> connection. (Layer 6)<br> 3. Client pushes across an HTTP Request (tunneled through SSL) with a<br> body containing the authentication data. Don't use URL params. For a<br> low-risk system like this with no concept of user accounts, just a 20+<br> character password could be sufficient.<br> 4. If the client sent the right password, the server sends an HTTP<br> Response back with a body containing something like "OK". If the<br> client sent the wrong password, terminate the TCP connection and don't<br> respond to that host until they initiate a new connection.<br> 5. Client pushes across another HTTP Request, with a body containing<br> plain text that the server will parse to figure out what property to<br> set on the element, and what value. You can do something as simple as<br> name=value.<br> 6. Server will call g_object_set() on the appropriate gstreamer<br> element, in order to set the property at runtime.<br> 7. Here, you can optionally keep the channel open for re-use (to avoid<br> having to start over from step 1 if you want to set another property).<br> Or you can kill it on either side if you're done.<br> <br> If you use libsoup on the server, you can do this without starting<br> another thread, because libsoup has async methods that call a callback<br> that's tied into the GLib main loop. Only using one thread doesn't<br> scale extremely well to a large number of clients, but this sounds<br> like a simple job, so a simple solution will do.<br> <br> If the server is behind a NAT (i.e. it can listen on an IP that will<br> let it connect to other LAN computers but not let the public internet<br> connect to it), you CAN use the above method (extra security never<br> hurts), but you could skip the SSL if you want, if you are sure that<br> no unauthorized persons can connect to your LAN (an unsecured wifi<br> network would be an example of an *insecure* LAN).<br> <br> If you have no idea where to start, start here:<br> <a href="http://developer.gnome.org/libsoup/stable/libsoup-server-howto.html" target="_blank">http://developer.gnome.org/libsoup/stable/libsoup-server-howto.html</a> .<br> I would recommend learning the APIs and their semantics, rather than<br> just blindly copying and pasting from examples.<br> <br> BTW, you don't *have* to use C to write gstreamer apps. Since you<br> indicated you don't really know how to program in C, I would suggest<br> that you don't, unless you have some specific reason to. I would<br> suggest Python or Vala for a task such as this one. You get soup and<br> gstreamer bindings "for free" in those languages, and the syntax is a<br> lot friendlier.<br> <div><br> <br> ><br> > As an example I am using<br> > g_object_set (G_OBJECT (decoder2), "max-size-time", (guint64)300000000,<br> > NULL);<br> <br> </div>...So you already know the only gstreamer-relevant topic in your<br> question, and this entire post has been off-topic for this list. Just<br> FYI.<br> <div><div><br> ><br> > and would like to update this function with a new time manually.<br> ><br> > I have found some basic telnet socket examples but have no clue on how to<br> > mix both applications together so I can control gst.<br> ><br> > thx<br> > Art.<br> ><br> > _______________________________________________<br> > gstreamer-devel mailing list<br> > <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> > <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> </div></div></blockquote></div><br><br clear="all"><div><br></div></div></div><span class="HOEnZb"><font color="#888888">-- <br><font color="#333333" face="georgia, serif"><b>Michael Niemand</b></font><div><font color="#333333" face="georgia, serif"><b><br> </b></font><div><font face="georgia, serif" color="#999999">Albusstr. 17</font></div> <div><font face="georgia, serif" color="#999999">60313 Frankfurt/M</font></div><div><font face="georgia, serif" color="#999999">Germany</font></div><div><font face="georgia, serif" color="#999999"><br></font></div></div> <div> <div><font face="georgia, serif" color="#999999">Tel.: <a href="tel:%2B49%20%280%29%2069%20200%20130%2060" value="+496920013060" target="_blank">+49 (0) 69 200 130 60</a></font></div></div><div><div><font face="georgia, serif" color="#999999">Mobile: <a href="tel:%2B49%20%280%29%20171%20645%2029%2007" value="+491716452907" target="_blank">+49 (0) 171 645 29 07</a></font></div> <div><font face="georgia, serif" color="#999999"><br> </font></div><div><font face="georgia, serif"><font color="#999999">eMail: </font><a href="mailto:michael.niemand@gmail.com" target="_blank"><font color="#666666">michael.niemand@gmail.com</font></a></font></div><div><font face="georgia, serif" color="#999999"><a href="mailto:sip%3A1406283@sipgate.de" target="_blank">sip:1406283@sipgate.de</a></font></div> </div><br> </font></span></div> </blockquote></div><br><br clear="all"><div><br></div>-- <br><font color="#333333" face="georgia, serif"><b>Michael Niemand</b></font><div><font color="#333333" face="georgia, serif"><b><br></b></font><div><font face="georgia, serif" color="#999999">Albusstr. 17</font></div> <div><font face="georgia, serif" color="#999999">60313 Frankfurt/M</font></div><div><font face="georgia, serif" color="#999999">Germany</font></div><div><font face="georgia, serif" color="#999999"><br></font></div></div><div> <div><font face="georgia, serif" color="#999999">Tel.: +49 (0) 69 200 130 60</font></div></div><div><div><font face="georgia, serif" color="#999999">Mobile: +49 (0) 171 645 29 07</font></div><div><font face="georgia, serif" color="#999999"><br> </font></div><div><font face="georgia, serif"><font color="#999999">eMail: </font><a href="mailto:michael.niemand@gmail.com" target="_blank"><font color="#666666">michael.niemand@gmail.com</font></a></font></div><div><font face="georgia, serif" color="#999999"><a href="mailto:sip%3A1406283@sipgate.de" target="_blank">sip:1406283@sipgate.de</a></font></div> </div><br>