The encoders and decoders do base64 encoding of the binary data. The blog post says that this is so that only alphanumeric data is passed to the QR encoder. I assume this is because QR has an alphanumeric mode to more efficiently encode "alphanumeric" data. However, base64 encoding doesn't help for this because the QR "alphanumeric" encoding doesn't encode e.g., lower case letters, only 0-9, A-Z, $%*+-./: and space . I suggest to skip the base64 step to reduce the data size and improve performance.

There are not many airgapped communication projects out there. Would you be willing to link to other projects in your readme? I found this list:

• Terminal based leonjza/qrxfer#2
• Animated QR art EFPrefix/EFQRCode#56
• Static QR JamesCullum/file2qr#1
• keith-turner/qrcv#1
• cedricmartel/QrCodeTransfer#1
• xloem/qrstream#33
• mihaigiurgeanu/cold-widow#2
• CiscoCXSecurity/QRCode-Video-Data-Exfiltration#5
• https://github.com/anderson-/Eye-Fi/issues/2
• huanghq/flipqr#1

Originally posted by @DonaldTsang in fionafibration/TXQR-Android#1 (comment)

Hello,

txqr has to be one of the best animated qr code file transfer apps on github. Are there any plans to continue development on it and get it more usable? How easy or possible would it be to get this running on Windows with 720p or higher webcams for PC to PC animated QR code transfer?

There are ways to increase the data transmission rate of TxQR by using color.
Currently both JABCode and HiQ have released sources for such items, and OpenCV is considering to add them to their repo.

JABCode: https://github.com/jabcode/jabcode
HiQ: https://github.com/ouyangzhibo/HiQ-Robust-and-Fast-Decoding-of-High-Capacity-Color-QR-Codes

I goto the "txqr/cmd/txqr-tester/app" folder. I execute "gopherjs build". It always show as below:

../../../../../makiuchi-d/gozxing/planar_yuv_luminance_source.go:118:29: 0xFF000000 (untyped int constant 4278190080) overflows int

How to run the test app ? Hope your reply!

Error msg:

Decode failed: invalid header: unexpected EOF (0/100)

Error place:header format is (x/xx),but fmt.formator is 3 params

	_, err := fmt.Sscanf(header, "%d/%d/%d", &blockCode, &chunkLen, &total)

In https://github.com/google/gofountain there are various fountain codes that you could test to see which is more efficient.

• Binary
• Luby
• Mersenne (used by current versions of txqr)
• Online
• Raptor (the best according to Wikipedia)

And also there are other newer algorithms to test

• https://github.com/catid/wirehair
• https://github.com/catid/fecal
• https://github.com/cakemanny/fountain-codes

Adding this to https://github.com/hydrusnetwork/hydrus and associated mobile apps would be useful.
Hydrus is written in Python, BooruNav, AnimeBoxes and Nori are on Android, Mignori is on iOS

It would be nice if TxQR generates files that are share-able as a GIF, APNG and/or WebP for image sharing websites like twitter, Imgur and more.

if the dynamic qr code changes every second , if i printed / saved the current dynamic qr code as an image before it changes to another qr code , will that saved qr code image work anymore if i scan it ?
Thanks

you can use FLutter and talk from flutter to golang / gomobile.
Then you eliminate all swift.

Here is one example:
https://github.com/empirefox/flutter_dial_go

there are a few others out there.

Showing a Camera view to scan the QR code with flutter is quite easy.

Hi, what's the best resource for writing software compatible with txqr?