#
# The Python Imaging Library
# $Id$
#
# split an animation into a number of frame files
#
from PIL import Image
import os, string, sys
class Interval:
def __init__(self, interval = "0"):
self.setinterval(interval)
def setinterval(self, interval):
self.hilo = []
for s in string.split(interval, ","):
if not string.strip(s):
continue
try:
v = string.atoi(s)
if v < 0:
lo, hi = 0, -v
else:
lo = hi = v
except ValueError:
i = string.find(s, "-")
lo, hi = string.atoi(s[:i]), string.atoi(s[i+1:])
self.hilo.append((hi, lo))
if not self.hilo:
self.hilo = [(sys.maxint, 0)]
def __getitem__(self, index):
for hi, lo in self.hilo:
if hi >= index >= lo:
return 1
return 0
# --------------------------------------------------------------------
# main program
html = 0
if sys.argv[1:2] == ["-h"]:
html = 1
del sys.argv[1]
if not sys.argv[2:]:
print
print "Syntax: python explode.py infile template [range]"
print
print "The template argument is used to construct the names of the"
print "individual frame files. The frames are numbered file001.ext,"
print "file002.ext, etc. You can insert %d to control the placement"
print "and syntax of the frame number."
print
print "The optional range argument specifies which frames to extract."
print "You can give one or more ranges like 1-10, 5, -15 etc. If"
print "omitted, all frames are extracted."
sys.exit(1)
infile = sys.argv[1]
outfile = sys.argv[2]
frames = Interval(string.join(sys.argv[3:], ","))
try:
# check if outfile contains a placeholder
outfile % 1
except TypeError:
file, ext = os.path.splitext(outfile)
outfile = file + "%03d" + ext
ix = 1
im = Image.open(infile)
if html:
file, ext = os.path.splitext(outfile)
html = open(file+".html", "w")
html.write("\n\n")
while 1:
if frames[ix]:
im.save(outfile % ix)
print outfile % ix
if html:
html.write("
\n" % outfile % ix)
try:
im.seek(ix)
except EOFError:
break
ix = ix + 1
if html:
html.write("\n\n")