play() function

[harry-73]

Hi,

I want to stop the processing without stopping the video. For that, I try using the Quagga.pause() function. It works.

But when I try Quagga.play() restarting the processing, I have the error play is not a function. Looking at the source, I did not find a play function.
Is it a way to restart the processing after pause()?

Thanks.

[github-actions]

Thank you for filing an issue! Please be patient. :-)

[harry-73]

For the moment, I am using offProcessed() and offDetected() for pause and onProcessed(à and onDetected() for play.

[ericblade]

start() calls startContinuousUpdate() which unsets the stopped variable that is set when pause() is called.

if I may ask, what sort of a use case are you using where you want to have the camera continue, but barcode processing stop? I'd like to understand if that's something i should take into account .

[devantic]

I am using Quagga.pause() after a successful detection, awaiting a fetch from an API, then resuming scanning with Quagga.start(). Im my case it doesn't make sense to keep scanning while the fetch is in progress and I guess it saves battery drain considerably. I.e. instead of repeat rapid detections going on on the same barcode while the fetch is in progress, I now only have 2 (for some reason not 1, but I can live with 1 unnecessary detection rather than hundreds)

[ericblade]

I see. Apologies for theextreme time delay here. I completely stop my scanner and fire off a fetch, then display the fetched data. There's really no room for my use case to keep the camera opened and running while the user is looking at the data received. I could do something like that for rapid fire scanning, I suppose, but there'd be very little room left in the display for either data or camera.

In any case, though, I think the answer to the question is "Use start() to resume after pause()".. Or does that have some side effects? Re-open this issue if that does have unwanted side effects, or is not the correct answer.