Why Flutter qr and barcode scan packages do not scan all of the barcodes I try?

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Well, I have used multiple Flutter barcode scan pakcages, but could not find the proper one. The best I have tried was MobileScanner that was fast and mostly accurate, but it has one problem. When I hot restart the app my screen would black out and icon appears in the middle of the screen. Here you can see it: enter image description here It fixes automatically when I go to other app and back to my app without closing it.

Can someone show me the best flutter barcode scanner package that can scan most of the barcode types and is fast also. Also it should start to work automatically like i do not have to press some button for it to start.

Note: barcode_scan2, barcode_scanner. I have used these also, but they do not fit to my criteria.

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Here`s what I am using

qr_code_scanner

flutter_barcode_scanner

Hope that helps