Firmware

DH_SD-Eos-Civil_MultiLang_PN_Stream3_V2.623.0000000.22.R.190409.bin

Dahua firmware released Apr 9, 2019. May work with 17 devices, including PTZ-MT1B200UE-GN, PTZ-MT1B203UE-GN, PTZ-MT2000UA-0360-A.

Download

Permanent copy on the Internet Archive (item page)

Hardware IDs this firmware's installer accepts (17 devices).

Where these IDs come from

hwid: the device's own hardware check list, 17 IDs
Install: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
check.img: the device's own hardware check list, 17 IDs

Read from inside the firmware (dahua package (zip variant)).

Supported languages (14)

English, Italian, Spanish, Russian, French, German, Portuguese, Polish, Korean, Farsi, Czech, Dutch, Arabic, SpanishEU

Flash layout: 15 partitions, 8 written by this firmware

From the firmware's partition table (partitionV2.txt).

Partition	Start	End	Size	Image	Filesystem	Built
upmcu0	0x0	0x100000	1.0 MB	not written	—	—
U-Boot	0x200000	0x300000	1.0 MB	dhboot.bin.img	—	2019-04-09
hwid	0x300000	0x400000	1.0 MB	not written	—	—
updateflag	0x400000	0x500000	1.0 MB	not written	—	—
partition(ro)	0x500000	0x600000	1.0 MB	partition-x.cramfs.img	cramfs	2019-04-09
custom(ro)	0x600000	0x980000	3.5 MB	custom-x.squashfs.img	squashfs	2019-04-09
product(ro)	0x980000	0xd00000	3.5 MB	pd-x.squashfs.img	squashfs	2019-04-09
Kernel	0xd00000	0x1200000	5.0 MB	kernel.img	—	2019-04-09
romfs(ro)	0x1200000	0x1a00000	8.0 MB	romfs-x.squashfs.img	squashfs	2019-04-09
web(ro)	0x1a00000	0x2200000	8.0 MB	web-x.squashfs.img	squashfs	2019-04-09
user(ro)	0x2200000	0x3a80000	24.5 MB	user-x.squashfs.img	squashfs	2019-04-09
lens	0x7100000	0x7200000	1.0 MB	not written	—	—
syslog	0x7200000	0x7600000	4.0 MB	not written	ubi	—
config	0x7600000	0x7a00000	4.0 MB	not written	ubi	—
backup	0x7a00000	0x7e00000	4.0 MB	not written	ubi	—

Other files for much of the same hardware, from any vendor.