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#! /usr/bin/env python
# Copy a video file, interactively, frame-by-frame.
import sys
import getopt
from gl import *
from DEVICE import *
import VFile
import VGrabber
import string
import imageop
def report(time, iframe):
print 'Frame', iframe, ': t =', time
def usage():
sys.stderr.write('usage: Vcopy [-t type] [-m threshold] [-a] infile outfile\n')
sys.stderr.write('-t Convert to other type\n')
sys.stderr.write('-a Automatic\n')
sys.stderr.write('-m Convert grey to mono with threshold\n')
sys.stderr.write('-d Convert grey to mono with dithering\n')
sys.exit(2)
def help():
print 'Command summary:'
print 'n get next image from input'
print 'w write current image to output'
class GrabbingVoutFile(VFile.VoutFile, VGrabber.VGrabber):
pass
def main():
foreground()
try:
opts, args = getopt.getopt(sys.argv[1:], 't:am:d')
except getopt.error, msg:
print msg
usage()
if len(args) <> 2:
usage()
[ifile, ofile] = args
print 'open film ', ifile
ifilm = VFile.VinFile(ifile)
print 'open output ', ofile
ofilm = GrabbingVoutFile(ofile)
ofilm.setinfo(ifilm.getinfo())
use_grabber = 0
continuous = 0
tomono = 0
tomonodither = 0
for o, a in opts:
if o == '-t':
ofilm.format = a
use_grabber = 1
if o == '-a':
continuous = 1
if o == '-m':
if ifilm.format <> 'grey':
print '-m only supported for greyscale'
sys.exit(1)
tomono = 1
treshold = string.atoi(a)
ofilm.format = 'mono'
if o == '-d':
if ifilm.format <> 'grey':
print '-m only supported for greyscale'
sys.exit(1)
tomonodither = 1
ofilm.format = 'mono'
ofilm.writeheader()
#
prefsize(ifilm.width, ifilm.height)
w = winopen(ifile)
qdevice(KEYBD)
qdevice(ESCKEY)
qdevice(WINQUIT)
qdevice(WINSHUT)
print 'qdevice calls done'
#
help()
#
time, data, cdata = ifilm.getnextframe()
ifilm.showframe(data, cdata)
iframe = 1
report(time, iframe)
#
while 1:
if continuous:
dev = KEYBD
else:
dev, val = qread()
if dev in (ESCKEY, WINQUIT, WINSHUT):
break
if dev == REDRAW:
reshapeviewport()
elif dev == KEYBD:
if continuous:
c = '0'
else:
c = chr(val)
#XXX Debug
if c == 'R':
c3i(255,0,0)
clear()
if c == 'G':
c3i(0,255,0)
clear()
if c == 'B':
c3i(0,0,255)
clear()
if c == 'w' or continuous:
if use_grabber:
try:
data, cdata = ofilm.grabframe()
except VFile.Error, msg:
print msg
break
if tomono:
data = imageop.grey2mono(data, \
ifilm.width, ifilm.height, \
treshold)
if tomonodither:
data = imageop.dither2mono(data, \
ifilm.width, ifilm.height)
ofilm.writeframe(time, data, cdata)
print 'Frame', iframe, 'written.'
if c == 'n' or continuous:
try:
time,data,cdata = ifilm.getnextframe()
ifilm.showframe(data, cdata)
iframe = iframe+1
report(time, iframe)
except EOFError:
print 'EOF'
if continuous:
break
ringbell()
elif dev == INPUTCHANGE:
pass
else:
print '(dev, val) =', (dev, val)
ofilm.close()
main()
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