FTP procedure:
Marko: - Please connect via an elevated command prompt and FTP the camera
Marko: ftp IP_CAMERA
Marko: - Please use your user ROOT and it's password
Marko: - Here the commands that you will need to use for the reflash:
Marko: bin
Marko: hash
Marko: put P3301_5_40_9_4.bin flash_all
Marko:
Marko: please replace FileFirmware with the right one and the " are not needed 

打开CMD，输入ftp 192.168.1.22，系统会弹出提示输入用户名及密码

然后输入: bin

然后输入: hash

然后输入: put c:\test\P3301_5_40_9_4.bin flash_all

屏幕提示过程信息，然后顺利完成：

The system upgrade completed successfully.
The unit will now reboot.
To continue, please connect to the unit again.
There may be a short delay before the new connection is accepted.
This connection will now close.
214 Virtual target exit.
221 Goodbye.
ftp: 22937624 bytes sent in 2.93Seconds 7828.54Kbytes/sec.

之前通过软件界面及http界面都失败。