[gst-devel] Question about spiders and sinks.......

Bob Doan bdoan at sicompos.com
Sat May 31 18:46:06 CEST 2003

Hi All,

I'm trying to make use of "spider" and "fakesink" in order to get the
total amount of seconds of songs.  However if I use spider and fakesink
in my pipeline I can't get the total amount of time.  If I subsitute
"spider" with "mad" for an MP3 it will give me the correct time.. or if
I keep spider and replace fakesink with "osssink" I also can get the
correct time...  Am I doing something wrong or is it not supposed to


- Bob

#include <gst/gst.h>

main (int argc, char *argv[]) 
  GstElement *pipeline;
  GstElement *filesrc, *decoder, *sink;
  int res;
  int total=0;
  gint64 value;
  gboolean query_worked = FALSE;
  GstFormat format = GST_FORMAT_TIME;

  gst_init(&argc, &argv);

  if (argc != 2) {
    g_print ("usage: %s\n", argv[0]);
    exit (-1);
  pipeline = gst_pipeline_new ("pipeline");
  filesrc = gst_element_factory_make ("filesrc", "disk_source");
  g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);

  decoder = gst_element_factory_make ("spider", "decoder");

  sink = gst_element_factory_make ("fakesink", "play_audio");

  gst_bin_add_many (GST_BIN (pipeline), filesrc, decoder, sink, NULL);
  res = gst_element_link_many (filesrc, decoder, sink, NULL);
  res = gst_element_set_state (pipeline, GST_STATE_PLAYING);
  if(gst_bin_iterate (GST_BIN (pipeline))) {
    query_worked = gst_element_query (sink,  GST_QUERY_TOTAL, &format,
      total = value / GST_SECOND;	
  printf("total=%d\n", total);

  gst_element_set_state (pipeline, GST_STATE_NULL);
  gst_object_unref (GST_OBJECT (pipeline));
  exit (0);

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