118 lines
2.3 KiB
Python
Executable File
118 lines
2.3 KiB
Python
Executable File
#! /usr/bin/env python
|
|
|
|
# Manipulate the time base of CMIF movies
|
|
|
|
|
|
# Possibilities:
|
|
#
|
|
# - resample at a fixed rate
|
|
# - divide the time codes by a speed factor (to make it go faster/slower)
|
|
# - drop frames that are less than n msec apart (to accomodate slow players)
|
|
|
|
|
|
# Usage:
|
|
#
|
|
# Vtime [-m msec] [-r msec] [-s speed] [infile [outfile]]
|
|
|
|
|
|
# Options:
|
|
#
|
|
# -m n : drop frames closer than n msec (default 0)
|
|
# -r n : regenerate input time base n msec apart
|
|
# -s speed : speed change factor after other processing (default 1.0)
|
|
# infile : input file (default film.video)
|
|
# outfile : output file (default out.video)
|
|
|
|
|
|
import sys
|
|
sys.path.append('/ufs/guido/src/video')
|
|
import VFile
|
|
import getopt
|
|
import string
|
|
|
|
|
|
# Global options
|
|
|
|
speed = 1.0
|
|
mindelta = 0
|
|
regen = None
|
|
|
|
|
|
# Main program -- mostly command line parsing
|
|
|
|
def main():
|
|
global speed, mindelta
|
|
opts, args = getopt.getopt(sys.argv[1:], 'm:r:s:')
|
|
for opt, arg in opts:
|
|
if opt == '-m':
|
|
mindelta = string.atoi(arg)
|
|
elif opt == '-r':
|
|
regen = string.atoi(arg)
|
|
elif opt == '-s':
|
|
speed = float(eval(arg))
|
|
if len(args) < 1:
|
|
args.append('film.video')
|
|
if len(args) < 2:
|
|
args.append('out.video')
|
|
if len(args) > 2:
|
|
sys.stderr.write('usage: Vtime [options] [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
|
|
|
|
vout.setinfo(vin.getinfo())
|
|
vout.writeheader()
|
|
|
|
told = 0
|
|
nin = 0
|
|
nout = 0
|
|
tin = 0
|
|
tout = 0
|
|
|
|
while 1:
|
|
try:
|
|
tin, data, cdata = vin.getnextframe()
|
|
except EOFError:
|
|
break
|
|
nin = nin + 1
|
|
if regen:
|
|
tout = nin * regen
|
|
else:
|
|
tout = tin
|
|
tout = int(tout / speed)
|
|
if tout - told < mindelta:
|
|
continue
|
|
told = tout
|
|
vout.writeframe(tout, data, cdata)
|
|
nout = nout + 1
|
|
|
|
vout.close()
|
|
vin.close()
|
|
|
|
|
|
# Don't forget to call the main program
|
|
|
|
main()
|