This is the data in the qr code:
{"res":"1080p","sign":"","url":"rtmp://rtmp.url/path","ak":"0","ssid":"SSID of wifi network to connect to","pwd":"password of wifi network","rate":"0","dur":"0"}
valid values for rate (bitrate is for 1080p video):
3 (1.37 mbs video (default))
2 (1.1 mbs video)
1 (0.9 mbs video)
valid values for res:
1080p
720p
360p
(other value will make it stream the video in 480p)
Change the parameters in the string and then create a qr code with it, put the camera in live mode and scan it.
On linux you can do this to create the qr code from the string:
echo '{"res":"1080p","sign":"","url":"rtmp://rtmp.url/path","ak":"0","ssid":"SSID of wifi network to connect to","pwd":"password of wifi network","rate":"0","dur":"0"}' | qrencode -o out.png -l H