<html> <head> <style></style> </head> <body class='hmmessage'> You need to connect to the "pad-added" signal of the demuxer(qtdemux). The source pads of qtmux aren't available from the begining. Take a look at this section of the Gstreamer tutorial -->http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-dynamic.html <hr id="stopSpelling">Date: Wed, 14 Oct 2009 18:09:49 +0900 From: mspark@keti.re.kr To: gstreamer-devel@lists.sourceforge.net. Subject: [gst-devel] simple question about gst api <style> .ExternalClass P {margin-bottom:0px;} </style> <img src="http://gfx1.hotmail.com/mail/w4/pr01/ltr/i_safe.gif"> hi. I have some problem about constructing pipeline.   When I run gst-launch, I use it like this,(simple video/audio playback)   gst-launch-0.10.exe filesrc location="test.mp4" ! qtdemux name=demux    demux.video_00 ! { queue ! omx_mpeg4dec ! ffmpegcolorspace ! directdrawsink }   demux.audio_00 ! { queue ! faad ! directsoundsink }     I want to construct upper command with GST API!! but how??? Below is my test code. but it doesn't work! I'll appreciate it if you give any comment. ==========================================================================   bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));   filesrc = gst_element_factory_make ("filesrc", "myapp_source");   qtdemux = gst_element_factory_make ("qtdemux", "myapp_demux");     queue_v = gst_element_factory_make ("queue", "myapp_queue_video");   mp4_dec = gst_element_factory_make ("omx_mpeg4dec", "myapp_dec");   ccv    = gst_element_factory_make ("ffmpegcolorspace", "myapp_colorspace");   video_sink= gst_element_factory_make ("directdrawsink", "myapp_directdrawsink");     queue_a = gst_element_factory_make ("queue", "myapp_queue_audio");   aac_dec = gst_element_factory_make ("faad", "myapp_faad");   video_sink= gst_element_factory_make ("directsoundsink", "myapp_audiosink");       g_object_set (G_OBJECT (filesrc), "location", "iron.mp4", NULL);//filesrc location="test.mp4"   g_object_set (G_OBJECT (filesrc), "name", "demux", NULL);//qtdemux name=demux, right??     gst_bin_add_many (GST_BIN (bin), filesrc, qtdemux,                           queue_v, mp4_dec, ccv, video_sink, //video                           queue_a, aac_dec, audio_sink, //audio                           NULL);//right??   gst_element_link(filesrc, qtdemux);   gst_element_link(qtdemux, queue_v);    gst_element_link_many(queue_v, mp4_dec, ccv, video_sink, NULL);//right??     gst_element_link(qtdemux, queue_a);    gst_element_link_many(queue_a, aac_dec, audio_sink, NULL);//right?? <pre>Min-Seok Park =============================== Korea Electronics Technology Institute Multi-Media IP Tel.031-789-7385 Fax.031-789-7379 ===============================  </pre> <hr />Σύρετε φωτογραφίες στο παράθυρο του Messenger. Δείτε πώς. <a href='http://download.live.com/messenger ' target='_new'>Κάντε κλικ εδώ!</a></body> </html>