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Old Dec 16, 2015, 08:56 AM
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New Product
HM DVR incredible little size and price

Hi,

New product at bangood, goodluckby and so on.

It seems amazing, small size and cheap.

I'm thinking add to my airplane or ground station.

anyone tested it ?

Raul
------

http://www.banggood.com/Mini-DVR-Vid...p-1021117.html

Description:

Item Name: Mini DVR Video Audio Recorder
Power input: 5V
The output video format: PAL / NTSC(Optional)
Video output format (Video Output Size): VGA (640 x 480PX) D1 (720 x 480) HD (1280X480)
Optical frequency (Light frequency): 50HZ / 60HZ
Compression Format: MJPEG
Video frame rate: 30 frames
Maximum support TF card: 32G
Size: 41mm x 31mm x 9mm
Weight: Only 10g
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Old Dec 16, 2015, 02:57 PM
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Doesn't say if it records through static.
No maximum bitrate specified.
No sample videos or reviews.
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Old Dec 16, 2015, 05:00 PM
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I'm asking if this is a joke or not on banggood.
I've post again question on resolution 1280x480 ? (1280*720 ??? and especially 1280 !!! )
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Old Dec 16, 2015, 05:31 PM
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No, it's because NTSC and PAL are analog signals, and while there is a fixed number
of scan lines, which limits the vertical resolution, the scan lines themselves have no
preset resolution. We only associate 640x480 with analog signals because it matches
the 4:3 ratio at which we view them. If you've got the bandwidth, you can get a lot
more than 640 distinct pixels worth of information into a horizontal scan line, which
is why 720x480 (D1) resolution exists, and in this case 1280x480 to capture
as much information as possible from say a 900TVL camera.
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Old Dec 17, 2015, 02:25 AM
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Quote:
Originally Posted by macfly1202 View Post
I'm asking if this is a joke or not on banggood.
I've post again question on resolution 1280x480 ? (1280*720 ??? and especially 1280 !!! )
mcFly,

Please, share here Bangood's answers.

I need to buy a DVR for my Hobbyking Quanum goggles.

This is the smaller, lighter and cheaper DVR I ever seen.

All the best.

Raul
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Old Dec 18, 2015, 03:22 AM
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Quote:
Originally Posted by Daemon View Post
No, it's because NTSC and PAL are analog signals, and while there is a fixed number
of scan lines, which limits the vertical resolution, the scan lines themselves have no
preset resolution. We only associate 640x480 with analog signals because it matches
the 4:3 ratio at which we view them. If you've got the bandwidth, you can get a lot
more than 640 distinct pixels worth of information into a horizontal scan line, which
is why 720x480 (D1) resolution exists, and in this case 1280x480 to capture
as much information as possible from say a 900TVL camera.
Ok Daemon.

Very good video format explanation

I was confused at this specifications: Video output format (Video Output Size): VGA (640 x 480PX) D1 (720 x 480) HD (1280X480)

EDITED: I REALIZED THERE IS AN ERROR ON SPECIFICATIONS, DVR RECORDS IN REAL HD (1280 X 720). TESTED AHEAD ON THIS THREAD http://www.rcgroups.com/forums/showp...9&postcount=35

I think it is still a good buy, It's better and cheaper than this VGA option: http://www.banggood.com/1CH-Mini-DVR...-p-936416.html (28$)

But if what you need is HD quality you have to buy the expensive one: http://www.banggood.com/SD-DVR-High-...-p-952617.html (65$)

All the best

Raul
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Old Dec 23, 2015, 02:29 PM
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I read in other threads that it gets affected by 5V BEC by showing horizontal lines in the video image. Can anyone confirm?
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Old Dec 23, 2015, 02:36 PM
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Quote:
Originally Posted by _Sibi_ View Post
I read in other threads that it gets affected by 5V BEC by showing horizontal lines in the video image. Can anyone confirm?
Where did you read it ?

I ordered mine yesterday. Awaiting delivery.

Raul
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Old Dec 23, 2015, 10:47 PM
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Quote:
Originally Posted by raulvolador View Post
Where did you read it ?

I ordered mine yesterday. Awaiting delivery.

Raul
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I can confirm. You can't share a main battery pack with it. It has to run off a separate battery. I tried everything - Step up/down Vreg, LDO, LC filter, etc.
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Old Dec 24, 2015, 05:45 AM
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Quote:
Originally Posted by docphi View Post
I can confirm. You can't share a main battery pack with it. It has to run off a separate battery. I tried everything - Step up/down Vreg, LDO, LC filter, etc.
Hi docphi,

What can you tell us about HDMR video resolution ?

Can you share here a recording sample ?

Can you share manual ?

I search a lot and can't find anything

Thanks a lot

Raul
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Old Dec 26, 2015, 06:00 AM
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Different opipions

Hi

I found two different opinios about HMDVR

A negative experience, a lot of interference here: http://www.rcgroups.com/forums/showp...&postcount=772

A positive experience here: http://www.rcgroups.com/forums/showp...&postcount=791

Still awaiting my own unit I ordered.

All the best

Raul
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Old Dec 26, 2015, 03:45 PM
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mine is in the ship/plane to me... will comment asap
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Old Jan 01, 2016, 04:43 PM
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I would like to put one of these on my headplays hds. Is there any video available to show how good the recording is?
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Old Jan 01, 2016, 05:17 PM
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Can you fly bobby?
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Just wish to say avoid the little blue 1ch at all costs no matter how little...Its rubbish!
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Old Jan 04, 2016, 05:18 AM
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waiting for your updates for the review.want to buy this also but dont see any good review about it yet
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