Why won't my 4 channel DVR not let me review what I prevously recorded. I have 4 cameras set up but only 3 of them let me retreive previous footage but

Wrong format for computers to read.

Question edited for Make and clarity.
Question moved to Home Security.

No sound on this system, video only.

System Specs

Price breakthrough! An affordable 4 channel DVR suitable for day and night surveillance. Includes 500GB of storage for up to 300 hours of continuous video recording from the four 420TV line weatherproof colour cameras with IR illumination. The four channel DVR supports full D1 resolution at 25 frames per second on each channel and can be controlled across the network or by using the included mouse or remote control. Recordings can be initiated manually, triggered by a timer or activated by movement in the camera's field of vision. Connect the DVR to a computer network and you can even view video remotely from anywhere in the world using a web browser or Smartphone/iPhone® (via installed app*).

DVR Specifications:
• Video compression: H.264
• Video input: 4 x BNC composite
• Video output: HDMI, VGA, 2 x BNC Composite,
• Audio input: 1 x RCA
• Audio output: 1 x RCA
• Maximum recording resolution: 704 x 576 (D1) at 25fps per channel
• Maximum recording frame rate: 100fps
• Hard disk storage: 500GB SATA
• Back-up: USB & network remote back-up
• Network interface: RJ45, 10/100Mbps
• Power supply: 12VDC 5A (included)
• Dimensions: 255(L) x 185(W) x 50(H)mm

Camera Specifications:
• Sensor: 1/3 CMOS
• Horizontal resolution: 420TV Lines
• Lens type A (2 cameras): 3.6mm lens, 72 degree angle
• Lens type B (2 cameras): 6.0mm lens, 45 degree angle
• Size: 85(L) x 45(Dia.)mm
• Voltage: 12VDC from DVR power supply

Camera Cables:
• Cable type: Combination video and power
• Cable length: 18m

* Free app for viewing live video available for download.

https://www.jaycar.com.au/economy-network-4-channel-dvr-kit/p/QV3048

Manual

https://www.manualslib.com/manual/596293/Techview-Qv-3048.html#product-QV-3048

..

Hello Friend,
I am Nitin Khatri from India. 2 reason for this problem.
1. HDD Status OK but not showing recording due to Date changed to old year,month,day, please check camera date and search recording.
2. HDD Status fail, so you need to do following things:-
Your CCTV DVR HDD is not working or got stuck while recording footage, now you need to reset your HDD.
Note:- As you mentioned you replace Computer HDD into DVR, it means your have installed Normal HDD in CCTV DVR which is a bad idea, your CCTV technician should inform you that time when he installed that normal HDD in DVR. CCTV DVR HDD called Surveillance HDD which RPM rate is higher and can work well for recording footage buy a Western Digital Surveillance HDD and Install into your CCTV DVR for future safety.

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https://www.youtube.com/c/cctvnetworkingtechnicalsupport

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That's a SWANN for you. I would contact the seller and ask for a new DVR to replace what sounds like a defect. Possibly a hard drive issue. COnverting to AVI is not something that should only work occasionally.

Is it recording? Check you video settings. You may need to reformat the hard drive.

First you need to isolate the problem. Step one - make sure the video from the cameras is correct - use a monitor and check each input separate. If the video is correct, use one camera and start from input one on the DVR and check all inputs - in other words plug your camera in input 1, check for video to make sure is correct and shows up in the right place, than go to input 2. This way you check your DVR cards. If the video shows up, but in the wrong place - check the settings on the DVR - you might be able to change the physical input in the viewer.Or you might have a bad DVR.......do a search for DVR Doctors in Google - in case you need repair.

First, sorry for the delay in respoding to your post. I did notice that you had a prior question about the Power Supply on an R15 DVR. Does the unit have a manufacture code of 500(found on the right hand front Flip Door of the DVR)? If so, I might be able to help you in repairing the Power Supply. As far as I know, getting your DVR up and running again is the only way to watch your previously recorded programs. As far as retreiving programs from your old Hard Drive via other methods, I probably won't be able to help you there. When I had both of my identical DVR 15 500's apart for a parts swap to diagnos a failed Phototransistor(infra-red sensor for the remote control), I also tried to swap out the Hard Drives. This is what I found: When you swap a Hard Drive into another DVR, it won't play any of the programs previously recorded. However, if you record new programs on the swapped Hard Drive then they will be playable on this current setup. Now, if you swap the Hard Drive back to the original DVR it came out of, the programs will once again be accessible except for any that you might have recorded while the Hard Drive was in the other DVR. So, in conclusion, when programs are recorded on a particular DVR, it is encoded electronically to play back only in that DVR via communication from the Motherboard and the Hard Drive. I know, it sucks, but that is why I was asking if you are pretty sure the Power Supply is at fault. If so, I received info from this forum on how to fix the issue. Also, if the attempt fails, Ebay has some previously owned DVR's for sale and maybe you can get one for spare parts. Remember, the Power Board and Front Display Control Panel are the only interchangeable parts IF you want to view the programs on your DVR's Hard Drive. Let me know what your DVR does when you plug it in. That will go far in further diagnostics of your DVR.

Hi,

Normally the recordings are in MP4 format and a lot of players cannot play it. You would need divx plus player. Its free.

Cheers
TeaCii
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I'm wondering if the firmware can be upgraded as that might be the easiest thing. My other thought was that putting the hard drive into a PC and trying to view the video might be a way to see it.