Created
January 24, 2012 09:38
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split MPO format file (like a 3DS's stereo 3D picture) to individual JPG images.
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import sys | |
import os | |
from struct import unpack | |
def splitMPO( mpof ): | |
filename = mpof.name | |
#print "MPO input: {}".format(filename) | |
#check SOI | |
soi = mpof.read(2) | |
if soi != "\xff\xd8" : | |
print "{} is not a MPO file.(Bad SOI)".format(filename) | |
return | |
#read APP1 | |
app1 = mpof.read(10) | |
if app1[4:8] != "Exif" : | |
print "{} is not a MPO file.(\"Exif\" not found in APP1)".format(filename) | |
return | |
app1len = unpack(">H", app1[2:4])[0] | |
#print "APP1 length :{}".format(app1len) | |
mpof.seek(app1len - 8, os.SEEK_CUR) # data length is not include tag length (2byte). | |
#read App2 | |
while True: | |
app2 = mpof.read(8) | |
if app2[:2] != "\xff\xe2" : | |
print "{} is not a MPO file.(\"MPF\" not found in APP2)".format(filename) | |
return | |
app2len = unpack(">H", app2[2:4])[0] | |
#print "APP2 length :{}".format(app2len) | |
if app2[4:7] != "MPF" : | |
#find next APP2 | |
mpof.seek(app2len - 6, os.SEEK_CUR) | |
else: | |
offsetbase = mpof.tell() | |
mpfendian = mpof.read(4) | |
if mpfendian == "\x49\x49\x2a\x00": | |
endianpref = "<" #little endian | |
else: | |
endianpref = ">" #big endian | |
ifdoffset = unpack( endianpref + "L", mpof.read(4) )[0] | |
#print "IFD Offset: {}".format(ifdoffset) | |
mpof.seek( ifdoffset - 8, os.SEEK_CUR ) | |
break | |
#print "MPF endian type: {0}, offset base: {1}, tell: {2}".format( endianpref, offsetbase, mpof.tell() ) | |
#read MPIndex | |
mpidcount = unpack( endianpref + "H", mpof.read(2) )[0] | |
#print "MPIndex has {} datas".format(mpidcount) | |
for i in range(mpidcount): | |
mpiddata = mpof.read(12) | |
mpidtag = unpack( endianpref + "H", mpiddata[:2] )[0] | |
#print "tag[{0}]: {1:x}".format(i, mpidtag) | |
#if mpidtag == 0xb000: | |
# print "{0:x} format version: {1}".format(mpidtag, mpiddata[8:]) | |
#el | |
if mpidtag == 0xb001: | |
imagecount = unpack( endianpref + "L", mpiddata[8:] )[0] | |
#print "{0:x} image count: {1}".format(mpidtag, imagecount) | |
elif mpidtag == 0xb002: | |
entryoffset = unpack( endianpref + "L", mpiddata[8:] )[0] | |
#print "{0:x} entry offset: {1}".format(mpidtag, entryoffset) | |
mpof.seek( offsetbase + entryoffset, os.SEEK_SET ) | |
#print mpof.tell() | |
imageinfo = [] | |
for i in range(imagecount): | |
mpentrydata = mpof.read(16) | |
imageinfo.append( unpack( endianpref + "LLL", mpentrydata[:12] ) )#[flags(L)][size(L)][offset(L)] | |
#print "image[{}] size: {}, offset:{}({})".format(i, imageinfo[i][1], imageinfo[i][2], imageinfo[i][2] + offsetbase) | |
#split images | |
for i, imginfo in enumerate(imageinfo): | |
try: | |
#seek | |
if imginfo[2] > 0: | |
mpof.seek( offsetbase + imginfo[2], os.SEEK_SET ) | |
else: | |
mpof.seek( 0, os.SEEK_SET ) | |
#output file | |
outname = "{}_mp{}.jpg".format(filename[:-4], i) | |
outf = open( outname, "wb" ) | |
except IOError as inst: | |
print inst | |
else: | |
outf.write( mpof.read(imginfo[1]) ) | |
outf.close() | |
print "output {} ({} bytes)".format(outname, imginfo[1]) | |
if len(sys.argv) <= 1: | |
print "split MPO files to JPEG images." | |
print "usage {} mpofile1 mpofile2 ...".format(sys.argv[0]) | |
exit() | |
for i,a in enumerate(sys.argv[1:]): | |
print "input[{0}] :{1}".format(i, a) | |
try: | |
mpof = open(a, "rb") | |
except IOError as inst: | |
print inst | |
else: | |
splitMPO(mpof) | |
mpof.close() | |
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