This Firmware is SquashFS 4.0 / XZ. It opens with the 7zip program. But I do not know how to recompile by ubuntu ...
The China IP Cam is 360VRCam (Anyka in telnet/root): Anyka/Esee/Anran 960P 180° Wireless Fisheye Panoramic CCTV Smart Camera HD WIFI Webcam IP
