Keep top left corner of window where it was when resizing.

Keep aspect and max size of window at all times.
Remove (now unnecessary) sleep(0.1) in vcr capture code.
Add messages when initializing VCR.
Remove old comments.

Demo/sgi/video/Vb.py

@@ -194,10 +194,17 @@ def optfullsizewindow(self):
 		if not self.window:
 			return
 		gl.winset(self.window)
+		x, y = self.maxx, self.maxy
+		gl.keepaspect(x, y)
+		gl.stepunit(8, 6)
 		if not self.use_24:
+			gl.maxsize(x, y)
 			gl.winconstraints()
 			return
-		gl.prefsize(self.maxx, self.maxy)
+		left, bottom = gl.getorigin()
+		width, height = gl.getsize()
+		bottom = bottom+height-y
+		gl.prefposition(left, left+x-1, bottom, bottom+y-1)
 		gl.winconstraints()
 		self.bindvideo()
 
@@ -502,12 +509,16 @@ def single_capture(self, stepfunc, timecode):
 	def vcr_capture(self):
 		if not self.vcr:
 			try:
+				print 'Connecting to VCR ...'
 				self.vcr = VCR.VCR().init()
+				print 'Waiting for VCR to come online ...'
 				self.vcr.wait()
+				print 'Preparing VCR ...'
 				if not (self.vcr.fmmode('dnr') and \
 					  self.vcr.dmcontrol('digital slow')):
 					self.vcr_error('digital slow failed')
 					return
+				print 'VCR OK.'
 			except VCR.error, msg:
 				self.vcr = None
 				self.vcr_error(msg)
@@ -515,8 +526,6 @@ def vcr_capture(self):
 		if not self.vcr.still():
 			self.vcr_error('still failed')
 			return
-		# XXX for some reason calling where() too often hangs the VCR,
-		# XXX so we insert sleep(0.1) before every sense() call.
 		self.open_if_closed()
 		rate = self.getint(self.in_rate_vcr, 1)
 		rate = max(rate, 1)
@@ -541,12 +550,11 @@ def vcr_capture(self):
 					rate = rate - (here - addr)
 				addr = here
 			return
-		if not self.vcr.fwdshuttle(vcrspeed):	# one tenth speed
+		if not self.vcr.fwdshuttle(vcrspeed):
 			self.vcr_error('fwd shuttle failed')
 			return
 		cycle = 0
 		while count > 0:
-			time.sleep(0.1)
 			try:
 				here = self.vcr.sense()
 			except VCR.error, msg: