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Firmware

Amcrest_SD-Gauss_Eng_NP_Stream3-xiaobei_V2.821.00AC002.0.R.250410.bin

Amcrest firmware released Apr 10, 2025. May work with 9 devices, including SD-MT2A4000DB-A, SD-MT3A4004DB-A, SD-MT3E2005DB-A.

Released
Apr 10, 2025
Version
V2.821.00AC002.0.R
Size
95.9 MB
Hardware
9 devices

Download

Download firmware

Permanent copy on the Internet Archive (item page)

MD5
b01ab3e57c392b0195e02d66b1d8fb6a
SHA-256
9604128dbfcdf707babece9afef7fb09df0a33df2bdb3df351b2f8515e4b2d5a
Changelog
Release notes

Where it's published

Compatible hardware

Hardware IDs this firmware's installer accepts (9 devices).

Where these IDs come from
  • hwid: the device's own hardware check list, 9 IDs
  • Install: the installer's device list (board families), 1 ID, vendor Amcrest (not counted: a more specific list exists)
  • check.img: the device's own hardware check list, 9 IDs
  • hwid in check.bin: the device's own hardware check list, 9 IDs
  • Install in check.bin: the installer's device list (board families), 1 ID, vendor Amcrest (not counted: a more specific list exists)
  • check.img in check.bin: the device's own hardware check list, 9 IDs

Technical details

Read from inside the firmware (dahua ptz package). This file bundles 2 firmware images.

Firmware image

SoC
Novatek NT98560
Architecture
arm
OEM build
Amcrest
Bootloader
U-Boot 2019.04-svn11114
Image dates
Apr 10, 2025
Security
Signed, encrypted, security baseline V2.3
Language & video
English by default · NTSC
Flash layout: 11 partitions, 11 written by this firmware

From the image headers (only partitions this firmware writes).

PartitionStartEndSizeImageFilesystemBuilt
dtb0x400000x80000256.0 KBdhdtb.bin.img—2025-04-10
mini-boot0xc00000x140000512.0 KBdhboot-min.bin.img—2025-04-10
bootloader0x2400000x3400001.0 MBdhboot.bin.img—2025-04-10
rootfs0x18400000x3d4000037.0 MBromfs-x.squashfs.imgsquashfs2025-04-10
firmware0x3d400000x644000039.0 MBfirmware-x.squashfs.imgsquashfs2025-04-10
custom0x64400000x68400004.0 MBcustom-x.squashfs.imgsquashfs2025-04-10
kernel0x68400000x6c400004.0 MBkernel.img—2025-04-10
web0x6c400000x6f400003.0 MBkernel-aol.img—2025-04-10
web0x6c400000x7c4000016.0 MBweb-x.squashfs.imgsquashfs2025-04-10
web0x6f400000x7b4000012.0 MBrollback-aol.squashfs.imgsquashfs2025-04-10
pd0x7c400000x7f400003.0 MBpd-x.squashfs.imgsquashfs2025-04-10

check.bin

Architecture
arm
OEM build
Amcrest
Image dates
Apr 10, 2025
Security
Signed, security baseline V2.3
Language & video
English by default · NTSC

About the security baseline: firmware with a higher security baseline can stop a device going back to older firmware. A device already on a higher baseline than V2.3 may refuse this file, and after installing it you may not be able to downgrade to firmware with a lower baseline.

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