Update of /cvsroot/freevo/freevo/contrib/examples
In directory sc8-pr-cvs1:/tmp/cvs-serv20115/examples
Added Files:
dvd_cropscale.py
Log Message:
--- NEW FILE: dvd_cropscale.py ---
#if 0 /*
# -----------------------------------------------------------------------
# dvd_cropscale.py - Calculate crop and scale params for DVD backups
# -----------------------------------------------------------------------
# $Id: dvd_cropscale.py,v 1.1 2003/08/23 09:50:59 dischi Exp $
#
# Notes:
# Todo:
#
# -----------------------------------------------------------------------
# $Log: dvd_cropscale.py,v $
# Revision 1.1 2003/08/23 09:50:59 dischi
# *** empty log message ***
#
# Revision 1.1 2003/01/22 01:50:46 krister
# This app runs mplayer on a DVD to calculate crop/scale params.
#
#
# -----------------------------------------------------------------------
# Freevo - A Home Theater PC framework
# Copyright (C) 2002 Krister Lagerstrom, et al.
# Please see the file freevo/Docs/CREDITS for a complete list of authors.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MER-
# CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ----------------------------------------------------------------------- */
#endif
import os
import sys
import commands
import re
def main():
# The DVD title is 1 by default, or can be given as the first argument
title = 1
if len(sys.argv) >= 2:
title = int(sys.argv[1])
# The test clip position is 0:15:0 by default, or can be given as the second
argument
pos = '0:15:00'
if len(sys.argv) >= 3:
pos = sys.argv[2]
cmd = 'mplayer -quiet -dvd %s -vo null -ao null -vop cropdetect -frames 30 -ss %s
2> /dev/null' % (title, pos)
status, output = commands.getstatusoutput(cmd)
if status:
print 'Error:', status
sys.exit()
# Parsed settings
aspect = None
crop = None
lines = output.split('\n')
for line in lines:
# Check for base geometry
m = re.match(r'VIDEO:\s+MPEG2\s+(\d+)x(\d+)\s+\(aspect (\d)\).*', line)
if m and m.groups()[:2] != ('720', '480'):
print 'Can only handle base geometry 720x480! Got %s)' % m.groups()[:2]
sys.exit()
elif m:
# Aspect 0=1.33, 3=1.78
if m.groups()[2] == '2':
aspect = 1.33
else:
aspect = 1.78
# Check for crop results
m = re.match(r'[^(]+\(-vop crop=(\d+):(\d+):(\d+):(\d+)\).*', line)
if m:
# Is this the largest crop setting so far?
w, h, x0, y0 = map(lambda s: int(s), m.groups())
if not crop or (w, h, x0, y0) > crop:
crop = w, h, x0, y0
print 'Aspect: %s' % aspect
print 'Cropvals: %s' % list(crop)
print
w, h, x0, y0 = crop
# Calculate number of lines (=height=y) as the closest lower number
# divisible by 16
new_h = (h / 16) * 16
# New start line
new_y0 = y0 + (h - new_h) / 2
# Ok, now we got the crop values. Calculate the scaling so that
# the aspect ratio is correct, and the number of pixels on the line
# is divisible by 16.
# Scaling. The aspect on the disc is 1.5 (720/480), correct for that.
scale_x = aspect / 1.5
new_w = w * scale_x
# Adjust to the closest modulo 16
new_w = int(round(new_w / 16.0) * 16)
args = (new_w, new_h, w, new_h, x0, new_y0)
print 'Settings: -vop scale=%s:%s,crop=%s:%s:%s:%s' % args
print 'Original aspect = %1.2f, new = %1.2f' % (aspect, (float(new_w) / new_h) )
if __name__ == '__main__':
main()
-------------------------------------------------------
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