Well, for simplify my work.<div><br></div><div>I'm using gst_parse_launch to create the pipeline:</div><div><br></div><div><div><span class="Apple-tab-span" style="white-space:pre"> </span>gchar str[200];</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>sprintf(str, "filesrc location=./media/%s" <span class="Apple-tab-span" style="white-space:pre"> </span>\</div> <div><span class="Apple-tab-span" style="white-space:pre"> </span> "! audio/x-alaw, channels=1, rate=8000"<span class="Apple-tab-span" style="white-space:pre"> </span>\</div><div><span class="Apple-tab-span" style="white-space:pre"> </span> "! alawdec ! autoaudiosink", cmd->filename);</div> <div><span class="Apple-tab-span" style="white-space:pre"> </span> </div><div><span class="Apple-tab-span" style="white-space:pre"> </span>GError* err = NULL;</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>pipeline = gst_parse_launch(str, &err);</div> <div><span class="Apple-tab-span" style="white-space:pre"> </span>g_assert(pipeline != NULL);</div><div><br></div><div><div> <span class="Apple-tab-span" style="white-space:pre"> </span> // Play</div> <div><span class="Apple-tab-span" style="white-space:pre"> </span> g_print("Playing.");</div><div><span class="Apple-tab-span" style="white-space:pre"> </span> gst_element_set_state (pipeline, GST_STATE_PLAYING);</div> <div><span class="Apple-tab-span" style="white-space:pre"> </span> g_loop = g_main_loop_new (NULL, FALSE);</div><div><span class="Apple-tab-span" style="white-space:pre"> </span> g_main_loop_run (g_loop);</div> <div><span class="Apple-tab-span" style="white-space:pre"> </span> gst_element_set_state (pipeline, GST_STATE_NULL);</div><div><span class="Apple-tab-span" style="white-space:pre"> </span> g_print("Stopped\n");</div> <div><br></div></div><div>But no sound output, I tried at command-line, it works. What's the problem?</div><div><br></div><div>Thanks</div><div><br></div><div><br></div></div><div><br><br><div class="gmail_quote">2009/11/4 Freeman Zhang <span dir="ltr"><<a href="mailto:pcman.zhang@gmail.com">pcman.zhang@gmail.com</a>></span><br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Get it.<div><br></div><div>Thank you very much.<br><br><div class="gmail_quote">2009/11/4 Tim-Philipp Müller <span dir="ltr"><<a href="mailto:t.i.m@zen.co.uk" target="_blank">t.i.m@zen.co.uk</a>></span><div> <div></div><div class="h5"><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div>On Wed, 2009-11-04 at 18:02 +0800, Freeman Zhang wrote:<br> <br> > decoder = gst_element_factory_make("alawdec", "decoder");<br> > res = gst_element_link_filtered (filesrc, decoder, caps);<br> > g_assert(res == TRUE);<br> ><br> > But it return:<br> > gst_element_link_pads_filtered: assertion<br> > `GST_IS_BIN (parent)' failed<br> <br> </div>You need to add elements to a pipeline/bin before linking them.<br> <br> Cheers<br> <font color="#888888"> -Tim<br> </font><div><div></div><div><br> <br> <br> <br> <br> ------------------------------------------------------------------------------<br> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day<br> trial. Simplify your report design, integration and deployment - and focus on<br> what you do best, core application coding. Discover what's new with<br> Crystal Reports now. <a href="http://p.sf.net/sfu/bobj-july" target="_blank">http://p.sf.net/sfu/bobj-july</a><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank">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> </div></div></blockquote></div></div></div><br></div> </blockquote></div><br></div>