Thank you Matt! <div>I did it as you said and it worked like a charm. :)<div>I had to enable synchronization on fakesink if i add that first to the tee before playback. If i don't do so i can't connect an autoaudiosink while the pipeline is running. I get a buffer overflow error from the new sink. I guess fakesink starts in non realtime mode as a default.</div> <div><br></div><div>István<br><br><div class="gmail_quote">On Fri, Oct 15, 2010 at 6:24 AM, Gruenke, Matt <span dir="ltr"><<a href="mailto:mgruenke@tycoint.com">mgruenke@tycoint.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div lang="EN-US" link="blue" vlink="blue"> <div> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">When you add an element to a bin, you must match its state to that of the bin.</span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">I think the proper sequence is:</span></font></p> <ol style="margin-top:0in" start="1" type="1"> <li class="MsoNormal" style="color:navy"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial">add the element to the bin (keep in mind that a pipeline is just a special kind of bin)</span></font></li> <li class="MsoNormal" style="color:navy"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial">call gst_element_sync_state_with_parent() on the newly-added element</span></font></li> <li class="MsoNormal" style="color:navy"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial">link in the element</span></font></li> </ol> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">When I add a branch to a tee, I put everything on that branch in its own bin. That way, on addition & removal, I’m just dealing with that one bin.</span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">Matt</span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font></p> <p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font></p> <div> <div class="MsoNormal" align="center" style="text-align:center"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> <hr size="2" width="100%" align="center"> </span></font></div> <p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma;font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma"> Nagy István [mailto:<a href="mailto:nistvan.86@gmail.com" target="_blank">nistvan.86@gmail.com</a>] <br> <b><span style="font-weight:bold">Sent:</span></b> Thursday, October 14, 2010 18:02<br> <b><span style="font-weight:bold">To:</span></b> <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank">gstreamer-devel@lists.sourceforge.net</a><br> <b><span style="font-weight:bold">Subject:</span></b> [gst-devel] Dynamically add and remove audio sink</span></font></p> </div><div><div></div><div class="h5"> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Hello everyone!</span></font></p> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">I'm very new to GStreamer, i'm experimenting with the framework since a week. My current goal would be to write a radio scheduler application which can handle audio playback required for a web radio, stream the result with different encoders and optionally do audio output on a local audio hardware.</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">I did some tests about how can i plugin different sources to an Adder so i can use the pipeline as an audio mixer. After finding the pad blocking capability of GStreamer, i could add and remove audio sources into the pipeline without stopping it. <a href="http://stackoverflow.com/questions/3899666/adding-and-removing-audio-sources-to-from-gstreamer-pipeline-on-the-go" target="_blank">http://stackoverflow.com/questions/3899666/adding-and-removing-audio-sources-to-from-gstreamer-pipeline-on-the-go</a> I want to do this with the audio outputs as well, i like to add and remove different audio sinks while the pipeline is running.</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">I've added a Tee after the Adder so i can split up sources to many outputs. If i fire up the pipeline with an autoaudiosink (with it's own queue), playback works fine. If i add a fakesink to the Tee's output on the go (requesting a new src request pad an linking it with an another queue in the middle), one of my audio sources pauses the pipeline with a </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">basesrc gstbasesrc.c:2447:gst_base_src_loop:<Buzzer1> pausing after gst_pad_push() = wrong-state </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">error message in the debug output.</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">I've tried to put a block on the Adder's source output while adding the new audio sink, but it wouldn't help me.</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Here is the code i'm working with), it's the Java rewrite of the StackOverflow Python script what i linked above. I don't know what to try next. If i put the pipeline together with two sinks before the first start, everything works fine.</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">package test;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import java.io.IOException;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import java.util.logging.Level;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import java.util.logging.Logger;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import org.gstreamer.Element;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import org.gstreamer.ElementFactory;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import org.gstreamer.Gst;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import org.gstreamer.Pad;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import org.gstreamer.Pipeline;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">import org.gstreamer.State;</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">public class Main {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> public static void main(String[] args) {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Gst.init("RadioBeans", args);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Pipeline pipe = new Pipeline("Scheduler");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element mixer = ElementFactory.make("adder", "Mixer");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(mixer);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element tee = ElementFactory.make("tee", "Splitter");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(tee);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> mixer.link(tee);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element audioSink = ElementFactory.make("autoaudiosink","AudioOutput");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(audioSink);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element audioQueue = ElementFactory.make("queue","AudioQueue");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(audioQueue);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> tee.link(audioQueue);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> audioQueue.link(audioSink);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Pad mixerLine1=mixer.getRequestPad("sink%d");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Pad mixerLine2=mixer.getRequestPad("sink%d");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element buzzer1 = ElementFactory.make("audiotestsrc", "Buzzer1");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(buzzer1);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer1.set("freq", 1000);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Pad buzzer1src=buzzer1.getSrcPads().get(0);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer1src.link(mixerLine1);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element buzzer2 = ElementFactory.make("audiotestsrc", "Buzzer2");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(buzzer2);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer2.set("freq", 500);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Pad buzzer2src=buzzer2.getSrcPads().get(0);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer2src.link(mixerLine2);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.play();</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> try {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> System.in.read();</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> } catch (IOException ex) {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> }</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element fakeOutput = ElementFactory.make("fakesink", "FakeOutput");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(fakeOutput);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Element fakeQueue = ElementFactory.make("queue","FakeQueue");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.add(fakeQueue);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> fakeQueue.link(fakeOutput);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> tee.link(fakeQueue);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.play();</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> System.out.println("Added fakesink");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> try {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> System.in.read();</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> } catch (IOException ex) {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> }</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer1src.setBlocked(true);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer1.setState(State.NULL);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> buzzer1src.unlink(mixerLine1);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> mixer.releaseRequestPad(mixerLine1);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> System.out.println("Released buzzer1");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> try {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> System.in.read();</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> } catch (IOException ex) {</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> }</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> System.out.println("Stopping.");</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> pipe.stop();</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> }</span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> <div> <p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">}</span></font></p> </div> </div> </div></div></div> </div> <br>------------------------------------------------------------------------------<br> Download new Adobe(R) Flash(R) Builder(TM) 4<br> The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly<br> Flex(R) Builder(TM)) enable the development of rich applications that run<br> across multiple browsers and platforms. Download your free trials today!<br> <a href="http://p.sf.net/sfu/adobe-dev2dev" target="_blank">http://p.sf.net/sfu/adobe-dev2dev</a><br>_______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a><br> <br></blockquote></div><br></div></div>