 |
|
 |
formatted hdd from DVR
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
Posted: Sun Jul 20, 2008 1:13 am
Post subject: formatted hdd from DVR
|
Hi everybody,
I'm just a curious, if we format the hdd from a DVR, is it possible to recover the video using PC ? If not...then how do we recover it ? My friend has a DVR hdd formatted by WindowsXP and now all surveillance videos are lost  . How do I supposse to help him ?
Thanks in advance
|
|
|
|
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
|
Posted: Sun Jul 20, 2008 1:55 am
Post subject:
|
More info :
1. Drive taken out from the DVR box, connected as external USB box to PC, initialized, but nothing shown
2. Formatted 0.1% stopped, connect again to DVR, no videos shown
3. Recovered using Easy Recovery and O&O = thousands of jpgs
4. Browse using TestDisk and Knoppix, no file systems mountable.
5. Using R-Studio, found many mpegs but can not be played back
Help please ?
|
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
|
Posted: Sun Jul 20, 2008 3:14 am
Post subject:
|
Last attempt :
cloning the formatted hdd to another new hdd with suitable capacity using HIE 400, I will try to scan the clone drive using Helix Forensics
|
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
|
Posted: Sun Jul 20, 2008 3:30 am
Post subject:
|
| hddstudio wrote: |
5. Using R-Studio, found many mpegs but can not be played back
|
Any possibility of unsupported codecs or video encryption ?
|
|
|
|
| Thomas |
Moderator
|
Posts: 2083
Joined: 17 May 2004
Location: Houston, TX
|
|
|
Posted: Sun Jul 20, 2008 4:23 am
Post subject:
|
| hddstudio wrote: |
| hddstudio wrote: |
5. Using R-Studio, found many mpegs but can not be played back
|
Any possibility of unsupported codecs or video encryption ? |
Very likely. What DVR did it come out of?
_________________
Thomas
Sales Support
Video Insight
|
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
|
Posted: Sun Jul 20, 2008 4:54 am
Post subject:
|
| Thomas wrote: |
| hddstudio wrote: |
| hddstudio wrote: |
5. Using R-Studio, found many mpegs but can not be played back
|
Any possibility of unsupported codecs or video encryption ? |
Very likely. What DVR did it come out of? |
AVT760 I think it's AVTECH Chinese made, using 9 CCTV for video surveillance
|
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
|
Posted: Sun Jul 20, 2008 5:04 am
Post subject:
|
For friends who have experimented with this problem before, I'd like to know the file signature in hecadecimal code of .vse and vs4 files. Can anybody help me ? The file signature is the first 8 byte of a file shown in Hex Viewer, You can use WinHex or Hexworkshop and open file.
Many thanks before.
|
|
|
|
| hddstudio |
|
Posts: 8
Joined: 20 Jul 2008
|
|
|
Posted: Sun Jul 20, 2008 5:30 am
Post subject:
|
just found out. the file system is SnapOS (Unix) derivated from Linux embedded system in firmware of the DVR.
Really, a tough nut to crack. It uses proprietary algorithm to encrypt the video.
|
|
|
|
| scorpion |
|
Posts: 2707
Joined: 26 Mar 2007
Location: Melbourne Florida
|
|
|
Posted: Sun Jul 20, 2008 6:35 pm
Post subject:
|
|
|
|
| Thomas |
Moderator
|
Posts: 2083
Joined: 17 May 2004
Location: Houston, TX
|
|
|
Posted: Sun Jul 20, 2008 7:41 pm
Post subject:
|
| hddstudio wrote: |
just found out. the file system is SnapOS (Unix) derivated from Linux embedded system in firmware of the DVR.
Really, a tough nut to crack. It uses proprietary algorithm to encrypt the video. |
If you can extract the video files themselves, check the manufacturers website. They should have an application to handle viewing/decrypting the files.
_________________
Thomas
Sales Support
Video Insight
|
|
|
|
|
Options and Permissions
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
|
| Page 1 of 1 .:. |
|
|
|
