What is the right size for an QR code run on Citra?

Trying to scan a QR code on Citra (Tomodachi Life.) Camera is flickering much. Also, when I try to put an image file to scan. The size is too big. So, how can I fix the flicker or what is the right size for an image?

System Information

  • Operating System: Windows 10
  • CPU: Ryzen 5 3400G
  • GPU: Nvidia GTX 1650
  • Citra Version (found in title bar): 1723
  • Game: Tomodachi Life
  • Screenshot of Issue (include the full Citra window including titlebar):

I can send a video of the issue.

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I can’t really comment on the camera. Don’t really know what’s causing that.

The image scan is someting I can help with though:
The QR-Code image needs to have a certain QR-code to image size ratio. For example, this QR-code would appear too big in Citra:

Whilst this QR-code would be seen as the right size by Citra:
Please note that both images are the exact same size. The only difference between the two is that the QR-code percentage of the image in the second image is smaller compared to the first image.