Odd problem playing wav file
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Im having some trouble making a wav player, when i try to build the pipeline using gst-launch it works fine, but the source code building the same pipeline generates an error. Im sorry if the question is stupid, im new at gstreamer and im not getting what im doing wrong :-(. I followed an example i found on gstreamer documentation.
The gst-launch comand: gst-launch filesrc location="exemploWav.wav" ! wavparse ! audioconvert ! gconfaudiosink The source code that builds the same pipe (or at least it should build): #include <gst/gst.h> #include <glib.h> static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) { GMainLoop *loop = (GMainLoop *) data; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_EOS: g_print ("End of stream\n"); g_main_loop_quit (loop); break; case GST_MESSAGE_ERROR: { gchar *debug; GError *error; gst_message_parse_error (msg, &error, &debug); g_free (debug); g_printerr ("Error: %s\n", error->message); g_error_free (error); g_main_loop_quit (loop); break; } default: g_print("Teste.....[%d]\n", GST_MESSAGE_TYPE (msg)); break; } return TRUE; } int main (int argc, char *argv[]) { GMainLoop *loop; GstElement *pipeline, *source, *sink, *convert, *wavparse; GstBus *bus; /* Initialisation */ gst_init (&argc, &argv); loop = g_main_loop_new (NULL, FALSE); /* Check input arguments */ if (argc != 2) { g_printerr ("Usage: %s <Wav filename>\n", argv[0]); return -1; } /* Create gstreamer elements */ pipeline = gst_pipeline_new ("wav_player"); source = gst_element_factory_make ("filesrc", "file_source"); wavparse = gst_element_factory_make ("wavparse", "wav_parser"); convert = gst_element_factory_make ("audioconvert", "audio_convert"); sink = gst_element_factory_make ("gconfaudiosink","gnome_output"); if (!pipeline || !source || !sink || !convert || !wavparse ) { g_printerr ("One element could not be created. Exiting.\n"); return -1; } /* Set up the pipeline */ /* we set the input filename to the source element */ g_object_set (G_OBJECT (source), "location", argv[1], NULL); /* we add a message handler */ bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_watch (bus, bus_call, loop); gst_object_unref (bus); /* we add all elements into the pipeline */ gst_bin_add_many (GST_BIN (pipeline), source, convert, wavparse, sink, NULL); /* we link the elements together */ gst_element_link (source, wavparse); gst_element_link (wavparse, convert); gst_element_link (convert, sink); /* Set the pipeline to "playing" state*/ g_print ("Now playing: %s\n", argv[1]); gst_element_set_state (pipeline, GST_STATE_PLAYING); /* Iterate */ g_print ("Running...\n"); g_main_loop_run (loop); /* 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; } The error: Error: Erro no fluxo interno de dados. (something like "Error on internal data flow"). best regards, Katcipis ------------------------------------------------------------------------------ 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. http://p.sf.net/sfu/kodak-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Odd problem playing wav file
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wavparse element has 'sometimes' src pads so you can't just do
gst_element_link (wavparse, convert);
See http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/index.html section 8.1.1 how to handle it. Tiago Katcipis wrote: Im having some trouble making a wav player, when i try to build the pipeline using gst-launch it works fine, but the source code building the same pipeline generates an error. Im sorry if the question is stupid, im new at gstreamer and im not getting what im doing wrong :-(. I followed an example i found on gstreamer documentation. ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Odd problem playing wav file
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but why does it work every time with gst-launch?
On Thu, May 7, 2009 at 11:14 AM, Andrey Boyko <[hidden email]> wrote:
-- "it might be a profitable thing to learn Java, but it has no intellectual value whatsoever" Alexander Stepanov ------------------------------------------------------------------------------ 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. http://p.sf.net/sfu/kodak-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Odd problem playing wav file
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Because gst-launch as an application do it for you. I think in function
gst_parse_perform_delayed_link in file grammar.tab.c.
Tiago Katcipis wrote: but why does it work every time with gst-launch? ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Odd problem playing wav file
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hmm thanks for the help, im going to read more then. I got confused because on gst-launch it worked, i didnt realized that gst-launch was linking diferent.
On Thu, May 7, 2009 at 11:57 AM, Andrey Boyko <[hidden email]> wrote:
-- "it might be a profitable thing to learn Java, but it has no intellectual value whatsoever" Alexander Stepanov ------------------------------------------------------------------------------ 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. http://p.sf.net/sfu/kodak-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Odd problem playing wav file
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In reply to this post by Tiago Katcipis
On Thu, May 7, 2009 at 11:44 AM, Tiago Katcipis <[hidden email]> wrote: but why does it work every time with gst-launch? Because gst-launch handle sometimes src pads. Your application doesn't. gst-launch doesn't just link'em all and play, it handles pads accordingly to their types: request, sometimes and always, as described in the docs. You should read to understand what is happening and why it is that way.
-- Thiago Sousa Santos Embedded Systems and Pervasive Computing Lab (Embedded) Center of Electrical Engineering and Informatics (CEEI) Federal University of Campina Grande (UFCG) ------------------------------------------------------------------------------ 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. http://p.sf.net/sfu/kodak-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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In reply to this post by Tiago Katcipis
On Thu, 2009-05-07 at 10:23 -0300, Tiago Katcipis wrote:
> Im having some trouble making a wav player, when i try to build the > pipeline using gst-launch it works fine, but the source code building > the same pipeline generates an error. Im sorry if the question is > stupid, im new at gstreamer and im not getting what im doing > wrong :-(. I followed an example i found on gstreamer documentation. > > The gst-launch comand: > gst-launch filesrc location="exemploWav.wav" ! wavparse ! > audioconvert ! gconfaudiosink Hi, Check the result codes from various methods (hint some elements will not link correctly. Another hint, read some more about dynamic pads) Wim > > The source code that builds the same pipe (or at least it should > build): > #include <gst/gst.h> > #include <glib.h> > > static gboolean > bus_call (GstBus *bus, > GstMessage *msg, > gpointer data) > { > GMainLoop *loop = (GMainLoop *) data; > > switch (GST_MESSAGE_TYPE (msg)) { > > case GST_MESSAGE_EOS: > g_print ("End of stream\n"); > g_main_loop_quit (loop); > break; > > case GST_MESSAGE_ERROR: { > gchar *debug; > GError *error; > > gst_message_parse_error (msg, &error, &debug); > g_free (debug); > > g_printerr ("Error: %s\n", error->message); > g_error_free (error); > > g_main_loop_quit (loop); > break; > } > default: > g_print("Teste.....[%d]\n", GST_MESSAGE_TYPE (msg)); > break; > } > > return TRUE; > } > > int > main (int argc, > char *argv[]) > { > GMainLoop *loop; > > GstElement *pipeline, *source, *sink, *convert, *wavparse; > GstBus *bus; > > /* Initialisation */ > gst_init (&argc, &argv); > > loop = g_main_loop_new (NULL, FALSE); > > /* Check input arguments */ > if (argc != 2) { > g_printerr ("Usage: %s <Wav filename>\n", argv[0]); > return -1; > } > > /* Create gstreamer elements */ > pipeline = gst_pipeline_new ("wav_player"); > source = gst_element_factory_make ("filesrc", > "file_source"); > wavparse = gst_element_factory_make ("wavparse", "wav_parser"); > convert = gst_element_factory_make ("audioconvert", > "audio_convert"); > sink = gst_element_factory_make > ("gconfaudiosink","gnome_output"); > > if (!pipeline || !source || !sink || !convert || !wavparse ) { > g_printerr ("One element could not be created. Exiting.\n"); > return -1; > } > > /* Set up the pipeline */ > /* we set the input filename to the source element */ > g_object_set (G_OBJECT (source), "location", argv[1], NULL); > > /* we add a message handler */ > bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); > gst_bus_add_watch (bus, bus_call, loop); > gst_object_unref (bus); > > /* we add all elements into the pipeline */ > gst_bin_add_many (GST_BIN (pipeline), > source, convert, wavparse, sink, NULL); > > /* we link the elements together */ > gst_element_link (source, wavparse); > gst_element_link (wavparse, convert); > gst_element_link (convert, sink); > > > /* Set the pipeline to "playing" state*/ > g_print ("Now playing: %s\n", argv[1]); > gst_element_set_state (pipeline, GST_STATE_PLAYING); > > > /* Iterate */ > g_print ("Running...\n"); > g_main_loop_run (loop); > > /* 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; > } > > The error: > Error: Erro no fluxo interno de dados. (something like "Error on > internal data flow"). > > best regards, > Katcipis > ------------------------------------------------------------------------------ > 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. http://p.sf.net/sfu/kodak-com > _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ 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. http://p.sf.net/sfu/kodak-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Odd problem playing wav file
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thanks fot the hints Wim. Im going to read more before posting now.
On Thu, May 7, 2009 at 12:19 PM, Wim Taymans <[hidden email]> wrote:
-- "it might be a profitable thing to learn Java, but it has no intellectual value whatsoever" Alexander Stepanov ------------------------------------------------------------------------------ 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. http://p.sf.net/sfu/kodak-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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