/* GStreamer * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include <gst/gst.h> /* This example app demonstartes the use of pad query and convert to * get usefull statistics about a plugin. In this case we monitor the * compression status of mpeg audio to ogg vorbis transcoding. */ gint main (gint argc, gchar *argv[]) { GstElement *pipeline; GError *error = NULL; gchar *description; GstElement *encoder, *decoder; GstPad *dec_sink, *enc_src; gst_init (&argc, &argv); if (argc < 3) { g_print ("usage: %s <inputfile> <outputfile>\n", argv[0]); return -1; } description = g_strdup_printf ("filesrc location=\"%s\" ! mad name=decoder ! " "vorbisenc name=encoder ! filesink location=\"%s\"", argv[1], argv[2]); pipeline = GST_ELEMENT (gst_parse_launch (description, &error)); if (!pipeline) { if (error) g_print ("ERROR: pipeline could not be constructed: %s\n", error->message); else g_print ("ERROR: pipeline could not be constructed\n"); return -1; } decoder = gst_bin_get_by_name (GST_BIN (pipeline), "decoder"); encoder = gst_bin_get_by_name (GST_BIN (pipeline), "encoder"); dec_sink = gst_element_get_pad (decoder, "sink"); enc_src = gst_element_get_pad (encoder, "src"); if (gst_element_set_state (pipeline, GST_STATE_PLAYING) != GST_STATE_SUCCESS) { g_print ("pipeline doesn't want to play\n"); return -1; } while (gst_bin_iterate (GST_BIN (pipeline))) { gint64 position; gint64 duration; gint64 bitrate_enc, bitrate_dec; GstFormat format; format = GST_FORMAT_TIME; /* get the position */ gst_pad_query (enc_src, GST_QUERY_POSITION, &format, &position); /* get the total duration */ gst_pad_query (enc_src, GST_QUERY_TOTAL, &format, &duration); format = GST_FORMAT_BYTES; /* see how many bytes are genereated per 8 seconds (== bitrate) */ gst_pad_convert (enc_src, GST_FORMAT_TIME, 8 * GST_SECOND, &format, &bitrate_enc); gst_pad_convert (dec_sink, GST_FORMAT_TIME, 8 * GST_SECOND, &format, &bitrate_dec); g_print ("[%2dm %.2ds] of [%2dm %.2ds], " "src avg bitrate: %lld, dest avg birate: %lld, ratio [%02.2f] \r", (gint)(position / (GST_SECOND * 60)), (gint)(position / (GST_SECOND)) % 60, (gint)(duration / (GST_SECOND * 60)), (gint)(duration / (GST_SECOND)) % 60, bitrate_dec, bitrate_enc, (gfloat)bitrate_dec/bitrate_enc); } g_print ("\n"); return 0; }