You need to hold down the blue reset button for 10 seconds, then you have to wait for 30 sec ~ 1 min for the camera to finish booting. It will revert it back to the factory default. The default password should be 4321.
The ID would likely be 'admin' for most DVR's or NVR's. The password would be either '4321' or '4321abcd'.
To hard reset the later SRD series, the only way to do so is to use the remote controller. Try pressing the buttons in the following sequence:
Freeze - Alarm - Freeze - Alarm - Freeze -...
http://www.samsungcc.com.au/sites/default/files/samsung_user_manual_ipolis_mobile_android.pdf
Manual for IPolis
https://www.hanwhasecurity.com/media/attachment/file/u/s/user_manual-wisenet_mobile-english_v1_1-0616.pdf
Manual for Wisenet Mobile App
The manual for the...
On your Wisenet Mobile App, try go to setting and turning off the Maximum Resolution Limit. It sets the same maximum 2MP limit as the IPolis app to your streaming when it's on.