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#!/ufs/guido/bin/sgi/python
# Decompress a jpeg or jpeggrey video file to rgb format
# Usage:
#
# Vunjpeg [infile [outfile]]
# Options:
#
# infile : input file (default film.video)
# outfile : output file (default out.video)
import sys
import jpeg
sys.path.append('/ufs/guido/src/video')
import VFile
# Main program -- mostly command line parsing
def main():
args = sys.argv[1:]
if len(args) < 1:
args.append('film.video')
if len(args) < 2:
args.append('out.video')
if len(args) > 2:
sys.stderr.write('usage: Vunjpeg [infile [outfile]]\n')
sys.exit(2)
sts = process(args[0], args[1])
sys.exit(sts)
# Copy one file to another
def process(infilename, outfilename):
try:
vin = VFile.BasicVinFile(infilename)
except IOError, msg:
sys.stderr.write(infilename + ': I/O error: ' + `msg` + '\n')
return 1
except VFile.Error, msg:
sys.stderr.write(msg + '\n')
return 1
except EOFError:
sys.stderr.write(infilename + ': EOF in video file\n')
return 1
try:
vout = VFile.BasicVoutFile(outfilename)
except IOError, msg:
sys.stderr.write(outfilename + ': I/O error: ' + `msg` + '\n')
return 1
info = vin.getinfo()
if info[0] == 'jpeg':
format = 'rgb'
width, height = vin.getsize()
bytes = 4
elif info[0] == 'jpeggrey':
format = 'grey'
width, height = vin.getsize()
pf = vin.packfactor
width, height = width/pf, height/pf
bytes = 1
else:
sys.stderr.write('Vunjpeg: input not in jpeg[grey] format\n')
return 1
info = (format,) + info[1:]
vout.setinfo(info)
vout.writeheader()
sts = 0
n = 0
try:
while 1:
t, data, cdata = vin.getnextframe()
n = n + 1
sys.stderr.write('Frame ' + `n` + '...')
data, w, h, b = jpeg.decompress(data)
if (w, h, b) <> (width, height, bytes):
sys.stderr.write('jpeg data has wrong size\n')
sts = 1
else:
vout.writeframe(t, data, None)
sys.stderr.write('\n')
except EOFError:
pass
return sts
# Don't forget to call the main program
main()
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