1. Supports alarm, PTZ control, device configuration, etc. for dual-channel cameras;
2. Supports ultra motion detection alarm of IPCs and NVRs;
3. Supports crowd density alarm of NVRs;
4. Supports cloud upgrade for access control devices;
5. Supports displaying videos of dual-lens cameras in scale;
6. Optimized some error messages;
7. Optimized video display ratio;
8. Bug fixes, improved user experience