Video Gallery, How to Stop overlapping streams when user navigates to next item? Bug or syntax?

Question

My NASA Multimedia News App is exhibiting behavior that I would very much like to change. The app is in the store at
http://apps.microsoft.com/windows/en-us/app/nasa-multimedia-news/7e74f3fb-b550-4ac6-b437-388f034ee6df
If you look at one of the three video galleries, here is the scenario:
1. Start one of the videos, for example the most recent one.
2. without MANUALLY pausing the first video and before it finishes, scroll to the next item in the same gallery and PLAY it.
3. two streams are now playing, audio overlapping.
4. move on to the next item in the gallery OR GO TO A DIFFERENT PAGE/SCREEN, cover your ears.... 
in fact the stream needs to stop if you navigate away from it by either starting a different video in the same gallery or when you navigate to a different screen/page in the app. and it doesn't.
5. in fact, if you close the app by dragging it down and don't final close it by drag/hold flip or using taskmgr, if you re-open it the multiple audio streams will still be playing from where they left off.
I don't honestly know if it is the video control or something I didn't do in the syntax (or even if something CAN be done), but with the overlapping cacophony that results, it is less than optimal. My expectations/hopes, were that if one stream was already
playing, that moving to a new item and starting THAT stream would automatically terminate the original one that was playing so that only a single audio stream can be heard.
I hope the issue is clear.
Is this a bug? If it is by design, ugh. And is there a work around?
-- Barb Bowman

Answer 1

On Sat, 5 Apr 2014 01:20:04 +0000, thorwm wrote:
>All kidding aside, I did some searching in the forum and I found this post that may help?
>
>http://social.technet.microsoft.com/Forums/en-US/6037342d-2575-411b-a496-90d306f82b00/unable-to-stop-a-video-playing-using-updatecontextvideopause-true?forum=projectsiena
>
>Btw, what you're talking about sounds very similar to how Adobe Flash works - it figures that you (the end user) must know what you're doing when you start another audio file / video so it keeps adding to the stream.  The way I helped
the end user was to add the code to stop the media file playing when another one was selected.
>
>Hopefully the thread above gives you some ideas how you might do this in your situation. 
>
>
>I look forward to hearing what you find - sounds like a neat app (no pun intended!)
Thor, it is my NASA Multimedia App - I resubmitted it last night and I guess a
different tester got it and the update went through. But the issue still exists.
The difference between what I have in my app and that other thread is that I
have a video GALLERY as opposed to individual players. I did try messing around
with that  syntax
  UpdateContext({videoPause: false}); UpdateContext({videoPause: true});
Navigate(scrHome, ScreenTransition!Fade)
 But it didn't work between screens in my App and anyway, half of the issue is
that it wouldn't work on a single screen that contains a video gallery that has
say 10 videos, there is no OnSelect function used. I tried experimenting to see
if I could get syntax working at least for when the navigation is to a different
screen, but it doesn't work for me. Probably because it is a gallery.
 Hoping that Robin has a solution...
-- Barb Bowman