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25bf67a8a1
Original commit message from CVS: Add an example that shows transcoding stats for mpeg audio to vorbis
103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gst/gst.h>
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/* This example app demonstartes the use of pad query and convert to
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* get usefull statistics about a plugin. In this case we monitor the
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* compression status of mpeg audio to ogg vorbis transcoding.
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*/
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gint
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main (gint argc, gchar *argv[])
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{
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GstElement *pipeline;
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GError *error = NULL;
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gchar *description;
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GstElement *encoder, *decoder;
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GstPad *dec_sink, *enc_src;
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gst_init (&argc, &argv);
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if (argc < 3) {
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g_print ("usage: %s <inputfile> <outputfile>\n", argv[0]);
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return -1;
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}
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description = g_strdup_printf ("filesrc location=\"%s\" ! mad name=decoder ! "
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"vorbisenc name=encoder ! filesink location=\"%s\"", argv[1], argv[2]);
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pipeline = GST_ELEMENT (gst_parse_launch (description, &error));
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if (!pipeline) {
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if (error)
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g_print ("ERROR: pipeline could not be constructed: %s\n", error->message);
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else
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g_print ("ERROR: pipeline could not be constructed\n");
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return -1;
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}
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decoder = gst_bin_get_by_name (GST_BIN (pipeline), "decoder");
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encoder = gst_bin_get_by_name (GST_BIN (pipeline), "encoder");
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dec_sink = gst_element_get_pad (decoder, "sink");
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enc_src = gst_element_get_pad (encoder, "src");
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if (gst_element_set_state (pipeline, GST_STATE_PLAYING) != GST_STATE_SUCCESS) {
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g_print ("pipeline doesn't want to play\n");
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return -1;
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}
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while (gst_bin_iterate (GST_BIN (pipeline))) {
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gint64 position;
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gint64 duration;
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gint64 bitrate_enc, bitrate_dec;
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GstFormat format;
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format = GST_FORMAT_TIME;
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/* get the position */
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gst_pad_query (enc_src, GST_PAD_QUERY_POSITION,
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&format, &position);
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/* get the total duration */
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gst_pad_query (enc_src, GST_PAD_QUERY_TOTAL,
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&format, &duration);
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format = GST_FORMAT_BYTES;
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/* see how many bytes are genereated per 8 seconds (== bitrate) */
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gst_pad_convert (enc_src, GST_FORMAT_TIME, 8 * GST_SECOND,
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&format, &bitrate_enc);
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gst_pad_convert (dec_sink, GST_FORMAT_TIME, 8 * GST_SECOND,
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&format, &bitrate_dec);
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g_print ("[%2dm %.2ds] of [%2dm %.2ds], "
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"src avg bitrate: %lld, dest avg birate: %lld, ratio [%02.2f] \r",
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(gint)(position / (GST_SECOND * 60)),
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(gint)(position / (GST_SECOND)) % 60,
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(gint)(duration / (GST_SECOND * 60)),
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(gint)(duration / (GST_SECOND)) % 60,
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bitrate_dec,
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bitrate_enc,
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(gfloat)bitrate_dec/bitrate_enc);
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}
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g_print ("\n");
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return 0;
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}
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