[cyphar]

Yeah, this is the simplest solution but it won't really stand the test of time either -- what if any one of the programs you have stop being developed or no longer can be compiled (zbarimg is the most obvious example -- I tried to get it working for Paperback but couldn't figure out how to make Java behave).

[dtonon]

You can use any qrcode reader and simply concatenate the data streams. As usual if the specs are open source you are always able to recover the data, even without the original tools.