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Show HN: QRaro, store binary data into QR Codes and retrieve it later

20 点作者 tcsenpai10 个月前
Of course this is just for fun

5 条评论

matheusmoreira10 个月前
This is great. Have you looked into QR code&#x27;s structured append support? It provides the sequencing metadata required for reconstructing the data of multiple QR codes even if scanned out of order. It&#x27;s limited and other schemes would still be valuable but it might still be worth supporting since it&#x27;s native to the format.<p>Does it have camera support? I added binary decoding feature to zbar a few years ago, zxing already had it and seemed to be in far better shape overall but zbar had builtin camera support which was necessary for my use case.
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altbdoor10 个月前
I used to have a similar idea. In general, generate a series of QR codes for any file, and convert them into a GIF.<p>But then I quickly realized I probably have to design a metadata structure (e.g., how many total QRs, where is start, where is end, etc). I didn&#x27;t continue after that :-P<p>Obviously this wouldn&#x27;t scale in real world application, but it was a fun idea.
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rahimnathwani10 个月前
This reminds me of the Danmere Backer, a PC backup system that used VHS tapes.<p><a href="https:&#x2F;&#x2F;linbacker.sourceforge.net&#x2F;screenshots.html" rel="nofollow">https:&#x2F;&#x2F;linbacker.sourceforge.net&#x2F;screenshots.html</a>
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tcsenpai10 个月前
Update: added qrtools as a second decoder; now you can use 1000 (or more) chunks per qrcode. The pika image included can now be stored in just (!!) 124 qr codes.<p>EDIT: And added gzip compression too
ranger_danger10 个月前
Why not just use base64 or something
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