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/*******************************************************************************
qt2text.c
libquicktime - A library for reading and writing quicktime/avi/mp4 files.
http://libquicktime.sourceforge.net
Copyright (C) 2002 Heroine Virtual Ltd.
Copyright (C) 2002-2011 Members of the libquicktime project.
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2.1 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 Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*******************************************************************************/
#include "lqt_private.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* Dump all text strings from a quicktime file */
static void usage()
{
printf("usage: qt2text [-t track] <file>\n");
exit(0);
}
int main(int argc, char ** argv)
{
char * filename;
int track = 1;
quicktime_t * qtfile;
char * text_buffer = (char*)0;
int text_buffer_alloc = 0;
int timescale, len;
int i;
int64_t timestamp;
int64_t duration;
if(argc < 2)
{
usage();
}
if(argc > 2)
{
if(!strcmp(argv[1], "-t"))
{
if(argc < 4)
usage();
else
{
track = atoi(argv[2]);
filename = argv[3];
}
}
else
usage();
}
else
filename = argv[1];
qtfile = lqt_open_read(filename);
if(!qtfile)
{
fprintf(stderr, "Cannot open file %s\n", filename);
return -1;
}
if(lqt_text_tracks(qtfile) < track)
{
fprintf(stderr, "No text track %d\n", track);
return -1;
}
timescale = lqt_text_time_scale(qtfile, track-1);
len = lqt_text_samples(qtfile, track-1);
for(i = 0; i < len; i++)
{
if(!lqt_read_text(qtfile, track-1, &text_buffer, &text_buffer_alloc,
×tamp, &duration))
fprintf(stderr, "Reading text sample %d failed\n", i);
else
{
printf("Time: %"PRId64" (%f seconds), Duration: %"PRId64" (%f seconds), String:\n",
timestamp,
(double)(timestamp)/(double)(timescale),
duration,
(double)(duration)/(double)(timescale));
printf("\"%s\"\n", text_buffer);
}
}
if(text_buffer)
free(text_buffer);
quicktime_close(qtfile);
return 0;
}
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