Grandstream GXV3504 IP Encoder Firmware 1.0.4.56

BUG FIXES: - Fixed failure to modify 1st stream with 30FPS via ONVIF channel management. - Fixed GXV3504 constantly reboot with ONVIF 12.12_Media-2-3-11 testing kits. - Fixed GXV3504 CPU high usage and XML configuration file with unsupported resolution...