htracker.stop() does not work from an eventlistener

[auduno]

when calling stop() on a headtracker instance from an eventlistener, an InvalidStateError is raised in Chrome:

Uncaught InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.

[DanielMSchmidt]

May you provide a jsFiddle? I couldn't reproduce that error.

[ricricucit]

This is happening to me as well (trying to use headtrackr in the main Controller of an AngularJS App), but i can't find the cause of the problem...if it helps they were talking about the same error here as well: http://auduno.tumblr.com/post/25125149521/head-tracking-with-webrtc

UPDATE: i just realized that the tumbler it's from @auduno :) Any updates on this? (i'm not using htracker.stop())

[auduno]

I haven't really had time to look at it, unfortunately. Do you have the possibility to create an example of the bug in a dropbox or jsfiddle page?

[ricricucit]

Well i actually solved MY problem (which was something quite stupid).

To explain it, to those who might get the same problem:

Inside document.addEventListener("facetrackingEvent", function( event ) { i was doing: overlayContext.drawImage(stickImage,some,other,stuf,etc); Where stickImage didn't actually contain an image.

I'm sure that is not a bug of headtrackr tho.

[auduno]

Haha, great to hear it's not my fault :)

[havenchyk]

Sorry, if it's not a good place to ask, but is there way to stop getUserMedia at all from headtrackr?

[auduno]

If you mean stopping webcam stream, no. headtrackr.stop() merely stops the tracking, not the video. The correct way to stop a getusermedia stream is to call stop() on the mediastream, but I guess you also can call stop() or pause() on the video element.

[havenchyk]

@auduno, thanks for quick response. As I see, mediastream is placed deep into headtrackr.js, can I get mediastream outside headtrackr.js src to stop it? Sorry for this type of questions, headtrackr.js is too complicated for me, haven't success with it for several days.

[auduno]

Hmm, it seems I should have added functionality for this. As far as I can tell, it's not possible to stop the mediastream without the mediastream object, which I discard after I set it up. I'll try to add functionality for that within the next couple of days.

[havenchyk]

@auduno oh, thanks, it would be great! Should I create new issue for this? If you give me a tips, what need to do, I can try to male a pr

[auduno]

I created a new issue for it now here : https://github.com/auduno/headtrackr/issues/24

[havenchyk]

cool, thanks