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#!/usr/bin/python
# Copyright 2006-2007 Nanorex, Inc. See LICENSE file for details.
import os
# Make up a DVD that tests the borders on a television, to find out
# how big the borders need to be. Start with a black field and a white
# horizontal rectangle, and a text display of the number of border
# pixels as the white rectangle grows horizontally. Then do a vertical
# rectangle. The whole thing should be a ten-second animation maybe.
# Start with black.jpg, a 600x450 black image.
# The outcome of this test, with my television and my DVD player, is
# that a 600x450 graphic should have a border that shrinks it to
# 520x420 in order to keep things visible.
def do(cmd):
print cmd
if os.system(cmd) != 0:
raise Exception
def fillHorizontal(border, filename):
left = border / 2
right = 600 - left
cmd = 'convert'
cmd += ' -fill white'
cmd += ' -draw "rectangle %d,250 %d,350"' % (left, right)
cmd += (' -font courier -pointsize 24 -draw' +
' "text 200, 110 \'Border test\'"')
cmd += (' -font courier -pointsize 24 -draw' +
' "text 200, 150 \'%d/600 pixels\'"'
% (right - left))
cmd += ' black.jpg ' + filename
do(cmd)
def fillVertical(border, filename):
top = border / 2
bottom = 450 - top
cmd = 'convert'
cmd += ' -fill white'
cmd += ' -draw "rectangle 350,%d 450,%d"' % (top, bottom)
cmd += (' -font courier -pointsize 24 -draw' +
' "rotate 90 text 130, -200 \'%d/450 pixels\'"'
% (bottom - top))
cmd += ' black.jpg ' + filename
do(cmd)
yuv_num = 0
def oneSecond(func, param, yuvname):
global yuv_num
func(param, yuvname)
for j in range(1, 30):
do('cp %s %s' % (yuvname, 'foo.%06d.yuv' % yuv_num))
yuv_num += 1
for i in range(0, 100, 10):
yuvname = 'foo.%06d.yuv' % yuv_num
yuv_num += 1
oneSecond(fillHorizontal, i, yuvname)
for i in range(0, 100, 10):
yuvname = 'foo.%06d.yuv' % yuv_num
yuv_num += 1
oneSecond(fillVertical, i, yuvname)
do('mpeg2encode foo.par foo.mpeg')
do('rm -f foo.00*.yuv')
do('ffmpeg -i foo.mpeg -sameq foo.mp4')
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