[Psml] Question on Power Point - Projectors and Stuff

[Patrick]

Frank - since this might be of interest to others on this list.  You have
discovered the 'murky' world of multi-screen video devices coupled with the
'video overlay' typically used to display video on a PC.  The behaviour you
are seeing is highly dependent upon a) the vendor of the graphics chip in
your laptop, b) the choice of video codec and display technique used by
Logitech and VLC to show the 'live' video on the PC, and c) the
implementation of the 'external monitor' function on your laptop - which
varies by laptop vendor and graphics driver revision.    What you are
attempting to do is nearly the same as what 'home theater PC' users do when
they drive dual monitors and are able to show 'media player' on either
monitor - but sometimes you will find in these 'lash ups' that the video
will play correctly on the primary display surface, but will show up 'black'
on the secondary display due to the lack of YUV overlay planes for the
secondary display - higher end graphics cards and later drivers tend to get
this right.  If this doesn't lead you closer to the answer, drop me an email
with more details on the model of the laptop, type of video component in it
(ati radeon mobility is a popular one, integrated intel gmx graphics is
another), and the version of your video driver.  On many PC's and laptops
'video' windows simply are not shown on the secondary display.

 

Best Regards,

Patrick

 

  _____  

From: psml-bounces at usps.org [mailto:psml-bounces at usps.org] On Behalf Of
Frank Kemp
Sent: Wednesday, April 11, 2007 8:56 AM
To: patrick at northshore.cnchost.com
Cc: United States Power Squadrons Mailing List
Subject: [Psml] Question on Power Point - Projectors and Stuff

 

Colleagues on PSML -

A bit of patience while we get this sorted out: I need some help on a
technical issue and I can't find the right USPS venue for the question - so
if you can, point me in the right direction for technical help, or give me
some guidance with my plight:

Here is the issue: I have a Power Point and Projector lash-up. 

For a Squadron presentation in which I am using one of the elegant new PP
shows that came on the courseware CD - I ALSO am preparing to use a local
video camera, which is focused on the instructor's table - so that I can
show, at intervals during the class, via the PP projector, some training
aids that are available on the instructor's table. My goal is to flip out of
the PP presentation to show via the live camera, whatever needs to be shown:
i.e. a GPS, a radio, whatever small object that one would normally hold up
for the class to see - instead - projecting the live image of that object on
the screen.

I know that I could take pictures of the objects, and include the resulting
JPG images in the static PP series of slides - but, face it - this live
camera gambit could be more fun, flexible - and is worth the effort if I can
surmount the following problem. 

All is going well among the components - the PP slide show is working fine
(it has been loaded to the hard drive and is running in true PP version, not
the 'viewer' ), the little Logtech camera is working fine (a $45 item, using
Video Lan's VLC Player to give a full-screen image - it looks great - good
detail and adjusts well to dim light), the projector is projecting .... and
now my 'problem.'

I believed I could use the old technique of doing "ALT" and "TAB" to flip
between applications (i.e. PP to the Camera and back) .... BUT - the
projector becomes fixated on the first application to come along - and stays
with it - even though the display screen on the PC flips to the new
application at the time the ALT/TAB is pressed. Hummmmmmmmmm. What is going
on here? And how can I convince the projector to get with the program - and
show just what is on the display screen of the host PC? 

Its got to be an easy answer - but my attempts at "help" in various
applications have come up short.

If you have suggestions - please send them to me off-line
fkemp at optonline.net       if you don't want to clutter up PSML with this
somewhat technical pursuit. Thanks in advance

Frank Kemp

P/C Frank B. Kemp, JN
Darien Sail & Power Squadron, Darien CT, D/2
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Frank B. Kemp e-mail fkemp at optonline.net
20 Seagate Road phone (203) 656 1129
Darien, CT 06820-5625
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