diff --git a/Demo/sgi/video/LiveVideoIn.py b/Demo/sgi/video/LiveVideoIn.py
index 3fd8093..d0ea858 100755
--- a/Demo/sgi/video/LiveVideoIn.py
+++ b/Demo/sgi/video/LiveVideoIn.py
@@ -33,7 +33,7 @@
 	# Note that the data has to be cropped unless vw and vh are
 	# just right for the video board (vw:vh == 4:3 and vh even).
 
-	def init(self, pktmax, vw, vh):
+	def init(self, pktmax, vw, vh, type):
 		if not have_video:
 			raise RuntimeError, 'no video available'
 		if vw % 4 != 0:
@@ -43,6 +43,14 @@
 		if realvw < vw:
 			realvw = vw
 		self.realwidth, self.realheight = v.QuerySize(realvw, vh)
+		if not type in ('rgb8', 'grey', 'mono'):
+			raise 'Incorrent video data type'
+		self.type = type
+		if type in ('grey', 'mono'):
+			v.SetParam([SV.COLOR, SV.MONO, SV.INPUT_BYPASS, 1])
+		else:
+			v.SetParam([SV.COLOR, SV.DEFAULT_COLOR, \
+				  SV.INPUT_BYPASS, 0])
 		# Initialize capture
 		(mode, self.realwidth, self.realheight, qsize, rate) = \
 			v.InitContinuousCapture(SV.RGB8_FRAMES, \
@@ -70,7 +78,7 @@
 
 	def resizevideo(self, vw, vh):
 		self.close()
-		self = self.init(self.pktmax, vw, vh)
+		self = self.init(self.pktmax, vw, vh, self.type)
 
 	# Remove an instance.
 	# This turns off continuous capture.
@@ -105,8 +113,14 @@
 					  self.x1, self.y1)
 			self.lpos = 0
 			self.dataoffset = 0
+			if self.type == 'mono':
+				self.data = imageop.dither2mono(self.data, \
+					  self.width, self.height)
 		data = self.data[self.dataoffset:self.dataoffset+self.pktsize]
 		lpos = self.lpos
 		self.dataoffset = self.dataoffset + self.pktsize
-		self.lpos = self.lpos + self.lpp
+		if self.type == 'mono':
+			self.lpos = self.lpos + self.lpp*8
+		else:
+			self.lpos = self.lpos + self.lpp
 		return lpos, data
diff --git a/Demo/sgi/video/LiveVideoOut.py b/Demo/sgi/video/LiveVideoOut.py
index 033d925..23d03da 100755
--- a/Demo/sgi/video/LiveVideoOut.py
+++ b/Demo/sgi/video/LiveVideoOut.py
@@ -12,13 +12,15 @@
 	# wid:    the window id where the video is to be displayed (centered)
 	# vw, vh: size of the video image to be displayed
 
-	def init(self, wid, vw, vh):
+	def init(self, wid, vw, vh, type):
 		##print 'Init', wid, xywh
 		##print 'video', vw, vw
 		self.vw = vw
 		self.vh = vh
 		self.disp = Displayer().init()
-		info = ('rgb8', vw, vh, 1, 8, 0, 0, 0, 0)
+		if not type in ('rgb8', 'grey', 'mono'):
+			raise 'Incorrent live video output type'
+		info = (type, vw, vh, 1, 8, 0, 0, 0, 0)
 		self.disp.setinfo(info)
 		self.wid = wid
 		oldwid = gl.winget()
@@ -56,10 +58,15 @@
 	# LiveVideoIn.getnextpacket()).
 
 	def putnextpacket(self, pos, data):
-		nline = len(data)/self.vw
-		if nline*self.vw <> len(data):
-			print 'Incorrect-sized video fragment ignored'
-			return
+		if self.disp.format == 'mono':
+			# Unfortunately size-check is difficult for
+			# packed video
+			nline = (len(data)*8)/self.vw
+		else:
+			nline = len(data)/self.vw
+			if nline*self.vw <> len(data):
+				print 'Incorrect-sized video fragment ignored'
+				return
 		oldwid = gl.winget()
 		gl.winset(self.wid)
 		self.disp.showpartframe(data, None, (0, pos, self.vw, nline))
diff --git a/Demo/sgi/video/VFile.py b/Demo/sgi/video/VFile.py
index a5d1d92..5c05ed0 100755
--- a/Demo/sgi/video/VFile.py
+++ b/Demo/sgi/video/VFile.py
@@ -73,6 +73,7 @@
 	raise Error, 'Attempt to make RGB colormap (jpeg)'
 
 conv_jpeggrey = conv_grey
+conv_mono = conv_grey
 
 
 # Choose one of the above based upon a color system name
@@ -213,7 +214,8 @@
 	def init(self):
 		# Essential parameters
 		self.format = 'grey'	# color system used
-		# Choose from: grey, rgb, rgb8, hsv, yiq, hls, jpeg, jpeggrey
+		# Choose from: grey, rgb, rgb8, hsv, yiq, hls, jpeg, jpeggrey,
+		#              mono
 		self.width = 0		# width of frame
 		self.height = 0		# height of frame
 		self.packfactor = 1	# expansion using rectzoom
@@ -315,6 +317,9 @@
 				p = pf
 			if (width, height, bytes) <> (w/p, h/p, b):
 				raise Error, 'jpeg data has wrong size'
+		elif self.format == 'mono':
+			import imageop
+			data = imageop.mono2grey(data, w, h, 0x20, 0xdf)
 		if not self.colormapinited:
 			self.initcolormap()
 		if self.fixcolor0:
@@ -544,7 +549,7 @@
 			c0bits = c1bits = c2bits = 0
 			chrompack = 0
 			offset = 0
-		elif format in ('grey', 'jpeggrey'):
+		elif format in ('grey', 'jpeggrey', 'mono'):
 			c0bits = rest
 			c1bits = c2bits = 0
 			chrompack = 0
@@ -642,7 +647,7 @@
 	#
 	if format in ('rgb', 'jpeg'):
 		data = (format, 0)
-	elif format in ('grey', 'jpeggrey'):
+	elif format in ('grey', 'jpeggrey', 'mono'):
 		data = (format, c0bits)
 	else:
 		data = (format, (c0bits, c1bits, c2bits, chrompack, offset))
diff --git a/Demo/sgi/video/Vrec.py b/Demo/sgi/video/Vrec.py
index 69b0102..7e88a24 100755
--- a/Demo/sgi/video/Vrec.py
+++ b/Demo/sgi/video/Vrec.py
@@ -15,6 +15,11 @@
 # -q queuesize  : set the capture queue size (default 2)
 # -r rate       : capture 1 out of every 'rate' frames (default and min 2)
 # -w width      : initial window width (default interactive placement)
+# -n            : Don't write to file, only timing info
+# -d		: drop fields if needed
+# -g		: greyscale
+# -m		: monochrome dithered
+# -M value	: monochrome tresholded with value
 # 
 # moviefile     : here goes the movie data (default film.video);
 #                 the format is documented in cmif-film.ms
@@ -47,7 +52,7 @@
 import posix
 import getopt
 import string
-
+import imageop
 
 # Main program
 
@@ -57,8 +62,13 @@
 	audio = 0
 	rate = 2
 	width = 0
+	norecord = 0
+	drop = 0
+	mono = 0
+	grey = 0
+	monotreshold = -1
 
-	opts, args = getopt.getopt(sys.argv[1:], 'aq:r:w:')
+	opts, args = getopt.getopt(sys.argv[1:], 'aq:r:w:ndgmM:')
 	for opt, arg in opts:
 		if opt == '-a':
 			audio = 1
@@ -71,6 +81,17 @@
 				sys.exit(2)
 		elif opt == '-w':
 			width = string.atoi(arg)
+		elif opt == '-n':
+			norecord = 1
+		elif opt == '-d':
+			drop = 1
+		elif opt == '-g':
+			grey = 1
+		elif opt == '-m':
+			mono = 1
+		elif opt == '-M':
+			mono = 1
+			monotreshold = string.atoi(arg)
 
 	if args[2:]:
 		sys.stderr.write('usage: Vrec [options] [file [audiofile]]\n')
@@ -93,6 +114,8 @@
 	else:
 		audiofilename = None
 
+	if norecord:
+		filename = audiofilename = ''
 	v = sv.OpenVideo()
 	# Determine maximum window size based on signal standard
 	param = [SV.BROADCAST, 0]
@@ -123,11 +146,25 @@
 	print x, 'x', y
 
 	v.SetSize(x, y)
+<<<<<<< Vrec.py
+
+	if drop:
+		param = [SV.FIELDDROP, 1, SV.GENLOCK, SV.GENLOCK_OFF]
+	else:
+		param = [SV.FIELDDROP, 0, SV.GENLOCK, SV.GENLOCK_ON]
+	if mono or grey:
+		param = param+[SV.COLOR, SV.MONO, SV.INPUT_BYPASS, 1]
+	else:
+		param = param+[SV.COLOR, SV.DEFAULT_COLOR, SV.INPUT_BYPASS, 0]
+	v.SetParam(param)
+	
+=======
 
 	# VERY IMPORTANT (for PAL at least): don't drop fields!
 	param = [SV.FIELDDROP, 0]
 	v.SetParam(param)
 
+>>>>>>> 1.7
 	v.BindGLWindow(win, SV.IN_REPLACE)
 
 	gl.qdevice(DEVICE.LEFTMOUSE)
@@ -142,7 +179,8 @@
 		if dev == DEVICE.LEFTMOUSE:
 			if val == 1:
 				info = format, x, y, qsize, rate
-				record(v, info, filename, audiofilename)
+				record(v, info, filename, audiofilename,\
+					  mono, grey, monotreshold)
 		elif dev == DEVICE.REDRAW:
 			# Window resize (or move)
 			x, y = gl.getsize()
@@ -159,31 +197,41 @@
 # Record until the mouse is released (or any other GL event)
 # XXX audio not yet supported
 
-def record(v, info, filename, audiofilename):
+def record(v, info, filename, audiofilename, mono, grey, monotreshold):
 	import thread
 	format, x, y, qsize, rate = info
 	fps = 59.64 # Fields per second
 	# XXX (Strange: need fps of Indigo monitor, not of PAL or NTSC!)
 	tpf = 1000.0 / fps # Time per field in msec
-	vout = VFile.VoutFile().init(filename)
-	vout.format = 'rgb8'
-	vout.width = x
-	vout.height = y
-	vout.writeheader()
-	MAXSIZE = 20 # XXX should be a user option
-	import Queue
-	queue = Queue.Queue().init(MAXSIZE)
-	done = thread.allocate_lock()
-	done.acquire_lock()
-	thread.start_new_thread(saveframes, (vout, queue, done))
-	if audiofilename:
-		audiodone = thread.allocate_lock()
-		audiodone.acquire_lock()
-		audiostop = []
-		initaudio(audiofilename, audiostop, audiodone)
+	if filename:
+		vout = VFile.VoutFile().init(filename)
+		if mono:
+			vout.format = 'mono'
+		elif grey:
+			vout.format = 'grey'
+		else:
+			vout.format = 'rgb8'
+		vout.width = x
+		vout.height = y
+		vout.writeheader()
+		MAXSIZE = 20 # XXX should be a user option
+		import Queue
+		queue = Queue.Queue().init(MAXSIZE)
+		done = thread.allocate_lock()
+		done.acquire_lock()
+		thread.start_new_thread(saveframes, \
+			  (vout, queue, done, mono, monotreshold))
+		if audiofilename:
+			audiodone = thread.allocate_lock()
+			audiodone.acquire_lock()
+			audiostop = []
+			initaudio(audiofilename, audiostop, audiodone)
 	gl.wintitle('(rec) ' + filename)
 	lastid = 0
 	t0 = time.millitimer()
+	count = 0
+	timestamps = []
+	ids = []
 	v.InitContinuousCapture(info)
 	while not gl.qtest():
 		try:
@@ -191,34 +239,62 @@
 		except sv.error:
 			time.millisleep(10) # XXX is this necessary?
 			continue
+		timestamps.append(time.millitimer())
+		ids.append(id)
+		
 		id = id + 2*rate
 ##		if id <> lastid + 2*rate:
 ##			print lastid, id
 		lastid = id
 		data = cd.InterleaveFields(1)
 		cd.UnlockCaptureData()
-		queue.put(data, int(id*tpf))
+		count = count+1
+		if filename:
+			queue.put(data, int(id*tpf))
 	t1 = time.millitimer()
 	gl.wintitle('(busy) ' + filename)
 	print lastid, 'fields in', t1-t0, 'msec',
 	print '--', 0.1 * int(lastid * 10000.0 / (t1-t0)), 'fields/sec'
-	if audiofilename:
+	print 'Captured',count*2, 'fields,', 0.1*int(count*20000.0/(t1-t0)), 'f/s',
+	print count*200.0/lastid, '%,',
+	print count*rate*200.0/lastid, '% of wanted rate'
+	t0 = timestamps[0]
+	del timestamps[0]
+	print 'Times:',
+	for t1 in timestamps:
+		print t1-t0,
+		t0 = t1
+	print
+	print 'Ids:',
+	t0 = ids[0]
+	del ids[0]
+	for t1 in ids:
+		print t1-t0,
+		t0 = t1
+	print
+	if filename and audiofilename:
 		audiostop.append(None)
 		audiodone.acquire_lock()
 	v.EndContinuousCapture()
-	queue.put(None) # Sentinel
-	done.acquire_lock()
+	if filename:
+		queue.put(None) # Sentinel
+		done.acquire_lock()
 	gl.wintitle('(done) ' + filename)
 
 
 # Thread to save the frames to the file
 
-def saveframes(vout, queue, done):
+def saveframes(vout, queue, done, mono, monotreshold):
 	while 1:
 		x = queue.get()
 		if not x:
 			break
 		data, t = x
+		if mono and monotreshold >= 0:
+			data = imageop.grey2mono(data, len(data), 1,\
+				  monotreshold)
+		elif mono:
+			data = imageop.dither2mono(data, len(data), 1)
 		vout.writeframe(t, data, None)
 		del data
 	sys.stderr.write('Done writing video\n')
diff --git a/Demo/sgi/video/Vreceive.py b/Demo/sgi/video/Vreceive.py
index 17a803f..1c5273c 100755
--- a/Demo/sgi/video/Vreceive.py
+++ b/Demo/sgi/video/Vreceive.py
@@ -23,9 +23,10 @@
 
 def usage(msg):
 	print msg
-	print 'usage: Vreceive [-m mcastgrp] [-p port]'
+	print 'usage: Vreceive [-m mcastgrp] [-p port] [-c type]'
 	print '-m mcastgrp: multicast group (default ' + `DEFMCAST` + ')'
 	print '-p port    : port (default ' + `DEFPORT` + ')'
+	print '-c type    : signal type: rgb8, grey or mono (default rgb8)'
 	sys.exit(2)
 
 
@@ -39,9 +40,10 @@
 	port = DEFPORT
 	width = DEFWIDTH
 	height = DEFHEIGHT
+	vtype = 'rgb8'
 
 	try:
-		opts, args = getopt.getopt(sys.argv[1:], 'm:p:')
+		opts, args = getopt.getopt(sys.argv[1:], 'm:p:c:')
 	except getopt.error, msg:
 		usage(msg)
 
@@ -51,6 +53,8 @@
 				port = string.atoi(optarg)
 			if opt == '-m':
 				group = gethostbyname(optarg)
+			if opt == '-c':
+				vtype = optarg
 	except string.atoi_error, msg:
 		usage('bad integer: ' + msg)
 
@@ -64,7 +68,7 @@
 	gl.qdevice(DEVICE.WINSHUT)
 	gl.qdevice(DEVICE.WINQUIT)
 
-	lvo = LiveVideoOut.LiveVideoOut().init(wid, width, height)
+	lvo = LiveVideoOut.LiveVideoOut().init(wid, width, height, vtype)
 
 	ifdlist = [gl.qgetfd(), s.fileno()]
 	ofdlist = []
diff --git a/Demo/sgi/video/Vsend.py b/Demo/sgi/video/Vsend.py
index 888a366..067b4b0 100755
--- a/Demo/sgi/video/Vsend.py
+++ b/Demo/sgi/video/Vsend.py
@@ -22,7 +22,7 @@
 
 def usage(msg):
 	print msg
-	print 'usage: Vsend [-b] [-h height] [-p port] [-s size] [-t ttl]',
+	print 'usage: Vsend [-b] [-h height] [-p port] [-s size] [-t ttl] [-c type] [-m]',
 	print '[-w width] [host] ...'
 	print '-b        : broadcast on local net'
 	print '-h height : window height (default ' + `DEFHEIGHT` + ')'
@@ -30,6 +30,7 @@
 	print '-t ttl    : time-to-live (multicast only; default 1)'
 	print '-s size   : max packet size (default ' + `DEFPKTMAX` + ')'
 	print '-w width  : window width (default ' + `DEFWIDTH` + ')'
+	print '-c type   : Type: rgb8, mono or grey (default rgb8)'
 	print '[host] ...: host(s) to send to (default multicast to ' + \
 		DEFMCAST + ')'
 	sys.exit(2)
@@ -44,9 +45,10 @@
 	pktmax = DEFPKTMAX
 	width = DEFWIDTH
 	height = DEFHEIGHT
+	vtype = 'rgb8'
 
 	try:
-		opts, args = getopt.getopt(sys.argv[1:], 'bh:p:s:t:w:')
+		opts, args = getopt.getopt(sys.argv[1:], 'bh:p:s:t:w:c:')
 	except getopt.error, msg:
 		usage(msg)
 
@@ -64,6 +66,8 @@
 				width = string.atoi(optarg)
 			if opt == '-h':
 				height = string.atoi(optarg)
+			if opt == '-c':
+				vtype = optarg
 	except string.atoi_error, msg:
 		usage('bad integer: ' + msg)
 
@@ -92,9 +96,9 @@
 	gl.qdevice(DEVICE.WINTHAW)
 	width, height = gl.getsize()
 
-	lvo = LiveVideoOut.LiveVideoOut().init(wid, width, height)
+	lvo = LiveVideoOut.LiveVideoOut().init(wid, width, height, vtype)
 
-	lvi = LiveVideoIn.LiveVideoIn().init(pktmax, width, height)
+	lvi = LiveVideoIn.LiveVideoIn().init(pktmax, width, height, vtype)
 
 	s = socket(AF_INET, SOCK_DGRAM)
 	s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
diff --git a/Demo/sgi/video/vcopy.py b/Demo/sgi/video/vcopy.py
index fe012ea..d32bc1f 100755
--- a/Demo/sgi/video/vcopy.py
+++ b/Demo/sgi/video/vcopy.py
@@ -5,12 +5,18 @@
 from gl import *
 from DEVICE import *
 import VFile
+import string
+import imageop
 
 def report(time, iframe):
 	print 'Frame', iframe, ': t =', time
 
 def usage():
-	sys.stderr.write('usage: vcopy infile outfile\n')
+	sys.stderr.write('usage: vcopy [-t type] [-m treshold] [-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 treshold\n')
+	sys.stderr.write('-d Convert grey to mono with dithering\n')
 	sys.exit(2)
 
 def help():
@@ -20,7 +26,7 @@
 
 def main():
 	foreground()
-	opts, args = getopt.getopt(sys.argv[1:], 't:a')
+	opts, args = getopt.getopt(sys.argv[1:], 't:am:d')
 	if len(args) <> 2:
 		usage()
 	[ifile, ofile] = args
@@ -33,12 +39,28 @@
 
 	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)
@@ -83,6 +105,13 @@
 			if c == 'w' or continuous:
 				if use_grabber:
 					data, cdata = ofilm.grabframe()
+				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: