118 lines
2.3 KiB
Python
118 lines
2.3 KiB
Python
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#! /ufs/guido/bin/sgi/python
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# Manipulate the time base of CMIF movies
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# Possibilities:
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#
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# - resample at a fixed rate
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# - divide the time codes by a speed factor (to make it go faster/slower)
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# - drop frames that are less than n msec apart (to accomodate slow players)
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# Usage:
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#
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# Vtime [-m msec] [-r msec] [-s speed] [infile [outfile]]
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# Options:
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#
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# -m n : drop frames closer than n msec (default 0)
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# -r n : regenerate input time base n msec apart
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# -s speed : speed change factor after other processing (default 1.0)
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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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sys.path.append('/ufs/guido/src/video')
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import VFile
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import getopt
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import string
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# Global options
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speed = 1.0
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mindelta = 0
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regen = None
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# Main program -- mostly command line parsing
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def main():
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global speed, mindelta
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opts, args = getopt.getopt(sys.argv[1:], 'm:r:s:')
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for opt, arg in opts:
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if opt == '-m':
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mindelta = string.atoi(arg)
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elif opt == '-r':
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regen = string.atoi(arg)
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elif opt == '-s':
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speed = float(eval(arg))
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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: Vtime [options] [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.VinFile().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.VoutFile().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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vout.setinfo(vin.getinfo())
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vout.writeheader()
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told = 0
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nin = 0
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nout = 0
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tin = 0
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tout = 0
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while 1:
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try:
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tin, data, cdata = vin.getnextframe()
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except EOFError:
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break
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nin = nin + 1
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if regen:
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tout = nin * regen
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else:
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tout = tin
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tout = int(tout / speed)
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if tout - told < mindelta:
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continue
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told = tout
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vout.writeframe(tout, data, cdata)
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nout = nout + 1
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vout.close()
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vin.close()
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# Don't forget to call the main program
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main()
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