ActiveX: Opening a separate Windows Media Player 9 window and controlling playback
Hey all,
I am trying to open a video in WMP4 automatically in Labview and control it. There is an existing ActiveX container but it remains on the front panel. I can control its playback, but cannot pause and resume.
I can also open the video on a WMP9 window outside of LabView through Labview, but I have not been able to control it. Merely start it, and then watch it till it finishes. This is the preferred operation I need to figure out.
LabView Version: 8.6
ActiveX application: Windows Media Player 4
OS: Windows XP
My questions are:
a) How do you pause and resume a video file if using the ActiveX container for which LabView provides
b) How could I access the playback controls of an externally opened WMP instance through LabView (because I want to automate the playback based on acquired signals)
Note that the ActiveX refnum is WMP4 whereas the installed version on XP is WMP9.
Thanks in advance for your help,
Hasan
Solved!
Go to Solution.
Hi,
Thanks for your reply.
I do not have the
Vision Development Module in LabView. I think it would have been under
`Vision and Motion', however that menu is empty.
I have
managed to do what I want in the ActiveX container that shows the video
as a part of the front panel. I start the video, I pause it and the
screen goes blank (I want this feature. I could also get it to show the
frame at pause, but that does not suit my needs). When I resume the
play, it seeks to the point at which I paused the video.
To
do this, I use the invoke property -> controls ->
methodforcontrols-> play / stop functions and the currentposition
property as both read and write. I do not have the windows media
software development kit.
I have attached the VI which
describes what I have managed to do. Changing the first property node
to an invoke method -> openplayer node will open an external player,
but still do the required control of video playback on the wmp
container on the front panel, without affecting the video being run on
the external window. It seems like I should be able to tweak it and get
it to do the same thing on the external instance of WMP, yet I have not
been able to figure it out.
Thanks for looking at this,
Hasan
P.S. - I couldn't upload the video that I was using, hst_1.mpg because it is not a valid extension. Please substitute it with another file before running. Sorry for the inconvenience
Attachments:
playpausevid.vi 14 KB
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