Review: Mini 0902 Wi-Fi Dashcam with GPS - A7LA55 & 0V4689 (Gearbest.com)

I found a small hack. I chose the mode 2560x1080 using the program linkinEyes. The camera began to record video with high bit-rate (18Mbit)
I tested that app and it works much better than TonView. Thanks.

The 2560x1080p setting increases overall VBR to 13.9mbps, not 18mbps.

Here's file properties:
Code:
General
Complete name                            : E:\NORMAL\media002\20160418100912-N3935.86512W10506.64462.MP4
Format                                   : MPEG-4
Format profile                           : JVT
Codec ID                                 : avc1 (avc1/isom)
File size                                : 220 MiB
Duration                                 : 2mn 12s
Overall bit rate mode                    : Variable
Overall bit rate                         : 13.9 Mbps
Encoded date                             : UTC 2016-04-18 10:09:12
Tagged date                              : UTC 2016-04-18 10:09:12
AMBA                                     :

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L5
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 1 frame
Format settings, GOP                     : M=1, N=8
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 2mn 12s
Bit rate mode                            : Variable
Bit rate                                 : 13.5 Mbps
Maximum bit rate                         : 18.0 Mbps
Width                                    : 2 560 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 2.40:1
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.163
Stream size                              : 213 MiB (97%)
Title                                    : Ambarella AVC
Language                                 : English
Encoded date                             : UTC 2016-04-18 10:09:12
Tagged date                              : UTC 2016-04-18 10:09:12
Color range                              : Full

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 2mn 12s
Bit rate mode                            : Constant
Bit rate                                 : 64.0 Kbps
Nominal bit rate                         : 128 Kbps
Channel(s)                               : 1 channel
Channel positions                        : Front: C
Sampling rate                            : 32.0 KHz
Frame rate                               : 31.250 fps (1024 spf)
Compression mode                         : Lossy
Stream size                              : 1.01 MiB (0%)
Title                                    : Ambarella AAC
Language                                 : English
Encoded date                             : UTC 2016-04-18 10:09:12
Tagged date                              : UTC 2016-04-18 10:09:12

Text
ID                                       : 3
Format                                   : Timed Text
Codec ID                                 : text
Duration                                 : 2mn 12s
Source duration                          : 2mn 12s
Bit rate mode                            : Constant
Bit rate                                 : 6 554 bps
Stream size                              : 106 KiB (0%)
Source stream size                       : 106 KiB (0%)
Title                                    : Ambarella EXT
Language                                 : English
Forced                                   : No
Encoded date                             : UTC 2016-04-18 10:09:12
Tagged date                              : UTC 2016-04-18 10:09:12

Hi,

Could you post some video sample. I wonder the video quailty. Also how can I update the fw?
Here's a sample video at 13.9 mbps. No need to update firmware. Just set 2560x1080p using LinkinEyes app.
Much better VBR and it's cold weather here so heat is not an issue yet. Summer can be problem.
 
Sunny, thank you for posting this
 
Dear Sunny and DPS. Thank you for finding and testing the LinkinEyes app. I switched the camera to 2560x1080p and it is like a whole new device.
 
Dear Sunny and DPS. Thank you for finding and testing the LinkinEyes app. I switched the camera to 2560x1080p and it is like a whole new device.
Yes, 13.9mbps is much much better and as long as it doesn't melt in hot weather, no need to use original 8mbps video quality.

2560x1080p video screenshots:

20160418100610-N3934.83123W10506.31692.MP4_20160418_222224.937.jpg
20160418100610-N3934.83123W10506.31692.MP4_20160418_222241.640.jpg

20160418100610-N3934.83123W10506.31692.MP4_20160418_222252.921.jpg

20160418100610-N3934.83123W10506.31692.MP4_20160418_222400.468.jpg

20160418100610-N3934.83123W10506.31692.MP4_20160418_222420.328.jpg
 
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Yes, 13.9mbps is much much better and as long as it doesn't melt in hot weather, no need to use original 8mbps video quality.

[/QUOTE]
It did not feel too hot during my short drive to the gym tonight. The real test will be tomorrow on my 150 miles round trip commute. I really don't care if it melts... as long as it does not drip molten plastic on my dash :)
 
For those looking for better app to control mini 0902, LinkinEyes is the one.
It's much better and doesn't crash often and most of all, it has 2560x1080p resolution that bumps overall VBR to 13.9mbps (@Olgu, @Jeremy Wong, @CheckYourLights etc...) and video quality is way better.
Tested with Samsung Galaxy Note II and works great.
Here's download link: https://play.google.com/store/apps/details?id=com.fusionnext.camera&hl=en

Obviously, it's not made for 0902 but works fine as it's based on Ambarella.



 
Last edited:
Sunny, thank you for post. I will try it.
 
Wow, great discovery.:) Thanks for Sunny's test!
 
Perfect program to improve video quality, thank you very much for the contribution. This morning I received news gearbest, after checking that the equipment is faulty, I propose to give me a credit option from 40USD 80 usd :-( camera that cost the truth that I could only use it a week, but its design, quality and functions have liked, but I am doubtful that the new camera last me another week, that your good day this going? all
 
only buy what you can afford to lose with sellers like this, they sell stuff at such small profit margins that support is not an option
 
gearbest offer me the option to exchange the defective article sending, but return shipping is 30 usd, they offer me the defective item and get a refund of 35usd or sending a new one by paying a high rate shipping 40 usd. the question is that the other chamber and disassemble for parts, so I accept a new shipping 40 usd, waiting to have more in stock to send, I hope not to have the same problem of failure of the camera
 
O
gearbest offer me the option to exchange the defective article sending, but return shipping is 30 usd, they offer me the defective item and get a refund of 35usd or sending a new one by paying a high rate shipping 40 usd. the question is that the other chamber and disassemble for parts, so I accept a new shipping 40 usd, waiting to have more in stock to send, I hope not to have the same problem of failure of the camera
Alright, I can understand that. At least GearBest offered to exchange the unit.
Yes, shipping something back to China can be expensive.
 
I have bought mini 0902 but GPS socket fell inside in first use day I have contacted gearbest with RMA back GPS not worked. Is bad for mini series.

SM-N910C cihazımdan Tapatalk kullanılarak gönderildi
 
From the lack of communication it seems @Joy may have moved on to bigger and better things.

Is there someone else from the manufacturer that can provide answers to questions?
 
From the lack of communication it seems @Joy may have moved on to bigger and better things.

Is there someone else from the manufacturer that can provide answers to questions?

she hasn't moved anywhere, saw her a few days ago, probably just busy
 
How can I use that script. Could you please explain to me.

Download the script. Open it in any text editor.

At the beginning of the file, see the table of constants for some bitrates values.

Setting Example:
Let's change the bit rate for the resolution of 2560x1080 @ 30.
Find the corresponding block in the script.
Code:
##################
# 2560x1080 @ 30 #
##################
# Set 20Mbit
writew 0xC05E89EE 0x41A0

# Set Variable bitrate
writeb 0xC05E89E8 0x03

# Set Constant bitrate
#writeb 0xC05E89E8 0x01
If you want to change from 20Mbit to 25Mbps, replace 0x41A0 to 0x41C8.
We get following line:
Code:
writew 0xC05E89EE 0x41C8

We can also choose a variable or constant bitrate. The script is already configured to use variable bit rate. To switch to the constant bit rate necessary to comment out the line
Code:
writeb 0xC05E89E8 0x03
and uncomment the line
Code:
#writeb 0xC05E89E8 0x01

As a result, we should have the following text of the script:
Code:
##################
# 2560x1080 @ 30 #
##################
# Set 25Mbit
writew 0xC05E89EE 0x41C8

# Set Variable bitrate
#writeb 0xC05E89E8 0x03

# Set Constant bitrate
writeb 0xC05E89E8 0x01
The edited script must be copied to the root of the SD card.
 
Wi-fi is always on so high vbr of over 18mbps may be an issue.
I'm happy with 13mbps but can try 18mbps.
What is your code change for 18?
 
Last edited:
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