new Vtime.py: manipulate time codes.
diff --git a/Demo/sgi/video/Vtime.py b/Demo/sgi/video/Vtime.py
new file mode 100755
index 0000000..3096ce1
--- /dev/null
+++ b/Demo/sgi/video/Vtime.py
@@ -0,0 +1,117 @@
+#! /ufs/guido/bin/sgi/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.VinFile().init(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.VoutFile().init(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()