This seems to be due to using it on different display configurations: sometimes I use it on on a dual display computer sometimes on a single display computer. The video window appears to be displaying "off screen"
I wanted to find a way to fix this. It looks like this is possible. For example, from python, I can find all the windows with "Video" in the title and move them to the (0,0) position with code like this:
from pprint import pprint
import win32gui
import win32con # constants
VERBOSE = 1
windowlist = []
global videowinlist
def callback(hwnd, extra):
rect = win32gui.GetWindowRect(hwnd)
x = rect[0]
y = rect[1]
w = rect[2] - x
h = rect[3] - y
if VERBOSE > 1:
print("Window %s:" % win32gui.GetWindowText(hwnd))
print("\tLocation: (%d, %d)" % (x, y))
print("\t Size: (%d, %d)" % (w, h))
windowlist.append({'text':win32gui.GetWindowText(hwnd),
'hwnd':hwnd,
'xy': (x,y),
'w': w,
'h': h})
win32gui.EnumWindows(callback, None)
if VERBOSE >=2:
print("global list of windows in 'windowlist'")
pprint(windowlist)
videowinlist = [win for win in windowlist if win['text'].find('Video') >= 0]
if VERBOSE > 0:
print("video windows")
pprint(videowinlist)
for win in videowinlist:
r=win32gui.SendMessage(win['hwnd'], win32con.WM_ENTERSIZEMOVE)
if VERBOSE:
print("result of SendMessage")
pprint(r)
win32gui.SetWindowPos(win['hwnd'], 0, 0,0,win['w'], win['h'],
win32con.SWP_NOOWNERZORDER | win32con.SWP_SHOWWINDOW)
Tested so far on Windows 10, but should work on Windows 7 and other versions