Firmware

DH_IPC-HX8X4X-Kronos_Eng_P_Stream3_V2.622.0000000.5.R.181215.bin

Viatec and Dahua and Cifra firmware released Dec 15, 2018. May work with 3 devices, including IPC-HDW7243X, IPC-HDW7341X-B-E2, IPC-HDW8241X-3D.

Download

Permanent copy on the Internet Archive (item page)

Hardware IDs this firmware's installer accepts (3 devices).

Where these IDs come from

Install: the installer's device list (board families), 5 IDs, vendor General (not counted: a more specific list exists)
check.img: the device's own hardware check list, 3 IDs

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

Flash layout: 24 partitions, 10 written by this firmware

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

Partition	Start	End	Size	Image	Filesystem	Built
MinBoot	0x0	0x100000	1.0 MB	dhboot-min.bin.img	—	2018-12-15
U-Boot	0x200000	0x300000	1.0 MB	dhboot.bin.img	—	2018-12-15
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	2018-12-15
custom(ro)	0x600000	0x940000	3.3 MB	custom-x.squashfs.img	squashfs	2018-12-15
product(ro)	0x940000	0xc80000	3.3 MB	pd-x.squashfs.img	squashfs	2018-12-15
Kernel	0xc80000	0x1200000	5.5 MB	kernel.img	—	2018-12-15
romfs(ro)	0x1200000	0x1600000	4.0 MB	romfs-x.squashfs.img	squashfs	2018-12-15
web(ro)	0x1600000	0x1e00000	8.0 MB	web-x.squashfs.img	squashfs	2018-12-15
user(ro)	0x1e00000	0x3b80000	29.5 MB	user-x.squashfs.img	squashfs	2018-12-15
backpart	0x3b80000	0x3c80000	1.0 MB	not written	—	—
backcustom	0x3c80000	0x3fc0000	3.3 MB	not written	—	—
backproduct	0x3fc0000	0x4300000	3.3 MB	not written	—	—
backkernel	0x4300000	0x4880000	5.5 MB	not written	—	—
backromfs	0x4880000	0x4c80000	4.0 MB	not written	—	—
backweb	0x4c80000	0x5480000	8.0 MB	not written	—	—
backuser	0x5480000	0x7200000	29.5 MB	not written	—	—
syslog	0x7200000	0x7600000	4.0 MB	not written	ext4	—
config	0x7600000	0x7a00000	4.0 MB	not written	ext4	—
backup	0x7a00000	0x7e00000	4.0 MB	not written	ext4	—
data	0x8000000	0x8100000	1.0 MB	not written	ext4	—
blob	0x8100000	0x18000000	255.0 MB	blob.img	ext4	2018-12-15
bigdata	0x18000000	0x28000000	256.0 MB	not written	ext4	—

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