Footage gone? Time is now part of the problem.
Recovering Deleted or Lost CCTV Footage
Deleted or lost footage from DVRs, NVRs and recording drives can be inspected. Recovery feasibility is affected by how long recording continued after the loss, the disk state and the storage method.
- +25
- Years of experience
- +50K
- Cases handled
- 99%
- Success rate after diagnosis
Every new recording can overwrite the evidence.
When can camera footage be recovered?
- 01
Deleted clips
The needed recording disappeared from the device interface even though it was saved.
- 02
DVR not working
The recorder stopped or the clips are no longer viewable.
- 03
Damaged recording drive
The disk suffered a fault or was formatted by mistake.
DVRs and NVRs don't store video as a normal file.
DVR and NVR footage recovery
Recorders run continuously and may overwrite old clips automatically. Hikvision and Dahua systems can be inspected by device type, disk state and storage system before judging recovery feasibility.
Inspect the case
Choose the path
Safe recovery
Supported devices & brands
Recorders and surveillance systems we inspect
DVRs and NVRs don't store video as ordinary files; each vendor writes it in its own format. Knowing the device and how it records is the first thing that decides whether the requested clip can be reached.
Hikvision recorders
Video is written into large preallocated blocks with a separate index of channels and times. When the index is damaged the footage is still on the disk, and it is extracted by following the stream signature itself.
Dahua recorders
Recording is split into fixed segments, each carrying a header that names the channel and the timestamp. That allows clips to be sorted by camera and hour even after the index table is gone.
Uniview and rebranded recorders
Many devices on the market carry different brand names over a shared board and firmware. We identify the actual platform and firmware generation before reading the disk, because the format changes between versions.
Multi-disk NVR arrays
Larger installations spread footage across several disks in a RAID or JBOD group. One missing disk can cut clips in half, so the disks are treated as one set and kept in order.
Surveillance drives: WD Purple and Seagate SkyHawk
These disks are built to write continuously around the clock, which makes sector wear predictable after years of service. A tired drive is imaged with a gentler read strategy before anything is searched inside it.
On-camera storage
Cameras recording to an SD card run a much shorter write loop, so retention is far smaller than on a recorder. Taking the card out immediately is what makes the difference in these cases.
How we handle missing footage
- 01
Fix the timeline and the window
We record the device model, the channel count and the exact date and hour needed. From disk size, camera count and bitrate we estimate real retention, and whether the window can still be on the disk at all.
- 02
Image the recording drive read-only
The disk is disconnected from the recorder and copied in the lab through a read-only interface. It does not go back into the device, because any restart resumes writing from where it stopped.
- 03
Read the recorder's format, or work around it
If the index is intact we read it directly. If it is damaged or the device was formatted, we scan the image for video segment signatures and rebuild the channel and timestamp from the segment headers themselves.
- 04
Assemble the clips and hand them over
Recovered segments are converted to a format that plays in any player, ordered by channel and date. We state what was found and what does not appear on the disk, and hand over on a separate medium, with an NDA on request.
Before any step
Identify the case first
Time works against you here: every minute of new recording can overwrite the footage you need.
- 01
The clip was deleted from the interface
Its absence from the search list does not prove the data is gone, but continued recording can overwrite the old space. Stop the device and note the exact date, time and camera number you need.
- 02
The device formatted the disk
The outcome depends on the type of format and whether the device resumed recording afterwards. Do not re-add the disk to the DVR and do not agree to initialise it again.
- 03
The DVR or NVR will not work
The problem may be the device, the power supply, the disk, or the storage structure. Do not move the disk to another device that may format it automatically; keep the device, the disk and the power adapter together.
- 04
Footage exists but will not export or play
The problem may lie in the export format, the player, or the device index rather than the video itself. Keep the original file and the viewer the device produced.
Not ordinary files
Where is surveillance footage stored?
Footage may sit on a disk inside a DVR, a set of disks inside an NVR, a memory card in the camera, a NAS, or a cloud service. The recovery method differs with where it is stored, which is why the camera brand alone is not enough.
Some devices use their own file system and video fragmentation, so clips do not appear as ordinary MP4 files when the disk is connected to a computer. Clips may also be split into fragments tied to an internal index. Work therefore starts by imaging the storage medium, then understanding the device structure and reassembling the clips from that image.
From disk to a verifiable clip
- 01
Preserving the state
Recording is stopped, and the device screen, model, camera count and displayed time are documented. If the case relates to a report or a dispute, settings are not changed and the device is not restarted without coordination.
- 02
Imaging the storage medium
The disk is read in a way that prevents writing to it. If it is damaged, the reading problem is addressed first, then analysis continues on the image.
- 03
Establishing the recording structure
The device index, channels, timestamps and video fragments are located. Where the index is missing, the clip structures themselves can be searched, but exact names and dates may be affected.
- 04
Assembling the period needed
Priority goes to the channel and the critical window, with a margin before and after. The outcome may be a complete clip, scattered fragments, adjacent recordings, or nothing if the data was genuinely overwritten.
- 05
Verification and handover
Playback is checked and the period and channel are made clear. Where operationally needed, a viewable copy can be handed over while the original extracted copy is retained.
Between the extremes
Common cases and likely outcomes
- 01
A clip was deleted and recording continued for a few hours
Fragments or the whole clip may survive if new writing never reached its space. The priority is stopping the device and pinning down the time window precisely.
- 02
Recording continued for days after deletion
The likelihood of overwriting rises, especially with a small disk, many cameras and high resolution. The outcome cannot be inferred from the number of days alone.
- 03
The disk reads but the device says 'no recordings'
The index or the device database may be damaged while video fragments remain. Do not run repair or format before an image is taken.
- 04
A DVR disk makes a noise or disappears
The case becomes a damaged-disk recovery first. Do not keep powering the device on: continuous recording and unstable reading meet on the same source.
- 05
The clip exists at a different time
There may be clock drift or a timezone change. Clips around the expected time are reviewed and compared against known events rather than relying on a single timestamp.
Most damaging
Avoid these steps
- Do not restart recording 'just to check'.
- Do not initialise or format the disk.
- Do not move the disk to another DVR that may reformat it.
- Do not update firmware and do not factory reset.
- Do not record a test clip on the same channel.
- Do not delete or convert the original file if the case is legal — work on a copy.
- Do not adjust the device clock before documenting its difference from real time.
What we need for the initial assessment
- 01
The device
Make and full model of the DVR, NVR or camera.
- 02
Storage
Number of disks and their capacity, and whether it is RAID or a single disk.
- 03
Channels
How many channels, and which camera and number you need.
- 04
The time window
The date and time required, with a margin before and after.
- 05
Clock accuracy
The timezone, and whether the device clock is correct now.
- 06
Recording mode
Continuous, motion, event-based, or scheduled.
- 07
Settings
Resolution, frame rate and approximate retention period if known.
- 08
What happened
Deletion, formatting, a reset, device failure, disk failure or a failed export.
- 09
Recording since the loss
How much new recording has happened since the clip disappeared.
- 10
The purpose
Whether there is a legal need or a documented chain of custody.
FAQ
Before restarting or formatting.
It's possible in some cases, especially if the needed clips haven't been overwritten.
The result depends on the format type, the disk state and whether new data was recorded.
Hikvision devices and their drives can be inspected and recovery feasibility determined case by case.
If the device has fully overwritten it, nothing returns from the replaced space. Fragments or gaps may exist depending on the recording mode, and examination establishes what actually survived.
It depends on the device, but continued recording is the greater risk. It is better to stop it and avoid unnecessary operations on your only copy.
If the channel recorded audio and its data survives, it may be extracted with the video. Some systems record audio separately, or not at all.
It can be assessed, but it needs every disk, their order, and the RAID configuration, and the case is also handled as an array recovery.
Yes, depending on the card's condition and what has been written to it. Remove the card, do not return it to the camera, and do not record anything new.
It is an important indicator but can be affected by clock settings and timezone. In sensitive cases the extraction method and any known time difference must be documented.
Admissibility is for the relevant authority to decide and cannot be guaranteed from a service page. If the purpose is legal, tell us before handover so documentation, copying and chain-of-custody requirements can be set.
Stop powering it. The case becomes a damaged-disk recovery, and repeated power-ups combine continuous recording with unstable reading on the same source.
It depends on disk capacity, number of cameras and recording quality — so power the unit off immediately, since every new recording can overwrite what you need.
In many cases yes, as long as it wasn't recorded over; we inspect the device's proprietary file system to extract the clips.
Yes, along with other common recorder brands; we analyse each device's storage format before extraction.
Next step
Send case detailsStop recording and save the recovery chance.
Send the device type, the date you need and the disk state. We assess the case before the footage gets overwritten.