Did you try a backtrace ? Type bt <enter> in gdb .. It will show you the backtrace of the sigsegv and thus the line that failed... If not you can always try valgrind ... <div class="gmail_quote"> On Wed, May 6, 2009 at 7:59 PM, Guilherme <<a href="mailto:grlongo.ireland@gmail.com">grlongo.ireland@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi all. I finished building my code and it's compiled without any error, but when I run it I get the beautiful segmentation fault. No good. Running gdb I can't get the line of the problem, instead I have this: (gdb) run Starting program: /home/guilherme/EBA [Thread debugging using libthread_db enabled] [New Thread 0xb7a479b0 (LWP 5565)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb7a479b0 (LWP 5565)] 0xb7bf2234 in ?? () from /usr/lib/libgstfft-0.10.so.0 Is this a normal debug or I'm doing smth wrong? It seen a problem with my fft implementation. That is the code: #include<gst/gst.h> #include<glib.h> #include<gst/fft/gstffts16.h> static gboolean bus_call(GstBus *bus, GstMessage *msg, gpointer data); int main(int argc, char *argv[]) { GMainLoop *loop; GstElement *pipeline, *source, *filesink; GstBus *bus; GstBuffer *buffer; GstFFTS16 *fft; const gint16 *in; GstFFTS16Complex *freq; gst_init(&argc, &argv); loop = g_main_loop_new (NULL, FALSE); /*creating elements*/ pipeline = gst_pipeline_new ("audio-player"); source = gst_element_factory_make ("audiotestsrc", "file-source"); filesink = gst_element_factory_make ("alsasink", "audio-output"); fft = gst_fft_s16_new (128, FALSE); if (!pipeline || !source || !filesink) { g_printerr ("One element could not be created. Exiting.\n"); return -1; } /*set-up the pipeline*/ /*create and set up buffer*/ g_print ("\n\nCreating Buffer\n"); buffer = gst_buffer_new(); if(!buffer) g_printerr ("buffer could not be created\n"); else g_print ("Buffer Created\n\n"); /*set up fft transform*/ gst_fft_s16_fft (fft, in, freq); /*message handler*/ bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_watch (bus, bus_call, loop); gst_object_unref (bus); /*colocar todos elementos na pipeline*/ gst_bin_add_many (GST_BIN (pipeline), source, filesink, NULL); /*Linkar elementos*/ /*Cria o link entre os pads dos elementos*/ gst_element_link_many (source, filesink, NULL); /* set pipeline playing status */ gst_element_set_state (pipeline, GST_STATE_PLAYING); g_print ("Running...\n"); /*iterate*/ g_main_loop_run (loop); g_print ("Recording\n"); /* Out of the main loop, clean up nicely */ g_print ("Returned, stopping playback\n"); gst_element_set_state (pipeline, GST_STATE_NULL); g_print ("Deleting pipeline\n"); gst_object_unref (GST_OBJECT (pipeline)); return 0; } static gboolean bus_call(GstBus *bus, GstMessage *msg, gpointer data) { return TRUE; } ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. <a href="http://p.sf.net/sfu/kodak-com" target="_blank">http://p.sf.net/sfu/kodak-com</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>