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