Thanks to ljw2k for the firmware. I've installed it on the new model DH-SD49425XBN-HNR. Auto-Tracking works now but somehow some settings are missing. like the RTMP under network.
Device TypeDH-SD49425XBN-HNR
System VersionV2.800.1341000.0.R.P9.2522.UN.NR,
Build Date: 2020-03-12F
WEB...