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AV IN picture freeze unusable on Joying

I have connected a composite video input to the AV IN port on my Joying head unit and it seems like it does not work. I start the AV IN application and it shows the input for about 2 frames and then just sort of freezes the screen.
I notice that it does not actually seem to use the MCU to switch to that input in the same sort of way that it does when it switches to the rear camera which DOES in fact work well. It keeps the top status bar etc on top of the AV IN image.
Is this something unique to this Joying model?
Is there a different MCU firmware to try? I have tried the latest and one rev back and got the same results.
Any ideas to try?

Is the brake wire grounded or the option to allow video to play while driving checked?

What does "composite" mean to you? NTSC or PAL or SECAM?

It's not Joying-typical behavior I can asure you. I'm using a 7" Joying with rear and front camera (rear camera switched by reverse line, front camera by "AV In" and it works. COULD you perhaps have unchecked the "video while driving" setting ? I'm not sitting near my car just now and I'm not 100% sure this has a direct influence to the AV-IN port and not "just" the internal video player, but it's worth a try.
The video-while-driving selection overrides the "break" line JakeJM79 already mentioned I think, so it's worth checking that. I think it's in the settings under "driving safety" or something like that.
Also, to be 100% sure your camera is working correctly, swap rear and front cam (put the front cam on the "rear" video line, reverse car, if you see the front video at that time, your front camera is 100%).

mike.s said:
What does "composite" mean to you? NTSC or PAL or SECAM?
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Click to collapse
Well, that is a good question NTSC I believe is what I am feeding it. Does it need PAL maybe?

Did you ever find out if it needs PAL or NTSC?

Thoughts? Erisin 3090A - Single Din, quad core, 4.4, 1024x600

I'm looking to get a single DIN flip screen style head unit. Looks like there are really only 2 quad core options out there:
Eonon GA1312: Seems to be relatively popular Klyde design and shows up under a few other "brand" names. It meets my needs but the basic downsides here being the 800x480 screen and typical lack of an external microphone. From a Youtube walk through it looks like it is a KLD5 MCU.
Erisin 3090A: This looks like an upgraded quad core version of the Erisin 8990A (dual core system). This unit has the upsides of a 1024x600 screen, an external microphone (important given this is going in a loud sports car), options for DAB radio and DVB-T TV (not useful here in the US), and a removable face plate. (I can't post links but the specs are posted at the first google search link for "ES3090A")
Needless to say the Erisin looks like the better on paper, but I'm hesitant to pull the trigger. Anyone have any experience, thoughts, or comments on this unit?

I got both.
Eonon GA1312:
Bluetooth is total crap , no one can hear you in a call .
Missing 3g apn setup
unable to change panel leds color, they are blue and blinding.
no detachable front fascia
front usb and front audio in
Simple to root with a password.
Some apps cannot pass the initial screen due to low Res.
Shutdown timer does not work.
It has configurable reserve camera lines
Erisin 3090A
Bluethooth calling is great plus it has an additional external mic.
Device seems to have 2 Bluetooth devices , one for the phone and other for android
Any color you fancy for the panel leds
detachable front fascia
Can only be rooted via king root ( i was able to replace king root with superuser)
missing multitask button.
No front usb or audio in.
Shutdown timer set a 10 seconds, unable to change so far.
Dos not have configurable reserve camera lines ( most cameras come with lines integrated anyway.)
Both units have the same cpu.
Both units DVR are crap,most of the time they ether crash or fail to start.
The Eonon GA1312 has most setting integrated into the android control panel while the other unit has several other apps to change settings.
Also the Eonon GA1312 seems to have slightly better sound out of the box.
Hope it helps

Erisin a3090 a3090aen 3090aen android quadcore
After extensive reseach ,I also considered a couple of options.
I have a supra mk4 1993. It's double din sits quite low, so opted for a single din with fold out display. So i used the upper part of the space..
Also considered the dvb and TV for posible future uses.
Also there is a reverse camera input with reverse sensor contact as well as the expected dvr with the plug and play USB camera.
I tried a couple of USB cameras and the unit crashed or the app crashed, thought it was a pile of cap,* however I read that it has to be the camera supplied by Erisin. After purchase, the camera has been 100% . Dvr loop, 3 ,5 and 10 mins with option to use specific memory, adjustable up to 500mb.
Not tried the reverse camera as yet.
The Bluetooth works well, I have connected the android phone via Bluetooth for music and the torque unit. They work as expected.
However I did find that on occasions, the phone would knock off when I tired to activate the obd2 Bluetooth adaptor. ( got a converter adaptor on ebay £14)
I got around this by connecting the phone first.
I've not yet tried to connect 3 or more devices as yet.
The 4 really annoying thing are,
1. When on a Bluetooth call, you cannot access the android unit. It seems to lock on to the call screen.
2. Fast processor,* my arse.* More like missing a couple of cores. Slower than my galaxy s5. But fast enough for the pleasures it brings.
3. The Google voice app and other voice apps say error when trying to use. "Mic not working", (something like that).
The mic works normal on the phone and the voice memo apps.
The same happened on another new unit.
4. It seems like there is a limited memory for apps. Can't seem to change where they are stored.
I got about 6 apps totaling around 600mb. And it ran out of storage.
Other things like no AM Radio.
The screen only folds up to 90° angle exactly, so if it's low down on the dash, it may be an issue.
No mic on the dvr they provide,* or the app doesn't support it.
The Satnav could do with having the speed cameras info. But It didn't,* it does have the option to warn for it and others, in the settings though.
The WiFi works well if very close to the antenna otherwise seems to go weak very fast when creating a small distance.
I tested it with a new extended wifi antenna, and actually got a slower speed, but that could be a faulty lead!
I actually was able to test 2 units as I wanted to make sure that my initial unit was working as it should.
And it was. So I returned the second unit after extensive comparisons on data speed and app response times etc.
Despite the problems, I am sure I made the correct decision.
Amazing piece of kit considering I'm updating an old double din of 10 year old with satnav etc.
I use it via a "hotspot" , from my phone. Works really well.
Memory locations and availability work well.
Sound is great.
Ended up costing me £215 after I complained about the mic thing.
I'm sure that another app is blocking the mic from working on the Google thing and other voice apps.
Any or update would be really appreciated to help with my issues above.
I hope I have been of some help.
Contact me at [email protected]
Thanks

Is this a MTCB unit? Can I install Malaysk ROM on it?

USB Cameras

Hi everyone!
A simple question about android auto head units.
How can I use a usb camera as android system camera?
I mean, I want to use my head unit with apps like Mapillary, iOnRoad, ... or famous apps like Instagram but I cant. In my case only usb cameras work with DVR app.
Why?
Thanks!

My older KK Joying units can use a webcam. My newer sofia intel units cannot.

It's very frustrated because there are a lot of apps very usable for cars that need system camera.
For example, as I said before, I want to use iOnRoad. Nice AI app that alert you if your car changes road lane or even showes you the distance to others vehicles.

Dasaita Prado Reverse Camera Issues

Hey Guys,
I purchased https://www.aliexpress.com/store/pr...3106.html?spm=2114.12010615.0.0.65ff22ciKV5LY and I'm having a few issues with the my reversing camera. I Initially I was sent the wrong CANBUS adapter and I received the replacement today. My issues is when the I first turn on the car the camera works however when you put it into reverse again you just get a black screen.
Any idea's? MTKNAVI tell me that the Head Unit has native can bus support so it could be a software bug? Any help would be appreciated.

Rear camera view on PHONE running android auto

Hi guys,
I have thoroughly searched the forum, but I could not find an answer reffering to the use case of the car running android auto on the phone, not on the head unit.
Summary: is there a way to reproduce the rear camera functionality of a headunit running android auto in your phone instead?
I am aware there are video WiFi transimiters, also available apps to go with them, pick a rear camera from amazon and off you go, by launching the app on your phone, you can now see the rear camera.
HOWEVER, if android auto is running I would like this app to launch automatically as I put the rear gear in (hence, enabling current to the camera and having something to look at). For the apps and wifi transmiters, it seems they are built to just be continually run, not only on rear mode. See on youtube "DIY Inexpensive Digital Wireless RV Backup camera- Review EC170 and 903W TrA" (can´t post a link since I am a new user!)
It seems like the apps available are linked to a particular wifi transmitter? Or are they available for any device?
Do you know of an app that as soon as current is given to the rear camera, it will launch the camera app (overriding android auto typical screen, just like it happens in AA headunits with rear camera), and as current is cut from the camera, the app will shut down and let AA continue its business? (all of that without shuting down AA in the first place, just overlaying the camera view).
In case an app like that was not available, how difficult can it be to program? I could potentially be willing to pay.
I am not sure if I explained myself correcty. Let me know if you have any further questions, thanks in avance!

I doubt it. Head units which support cameras do so outside of AA (the camera simply takes the screen away from AA). And they have a wire connected to the backup lights to signal when to switch to the camera. And I'm not aware of any backup cameras which use WiFi or Bluetooth (which doesn't have enough bandwidth anyway) - they're either hardwired or use a proprietary wireless link to a dedicated receiver which connects to the head unit.
So, there are three problems to solve. How does the phone know the car is in reverse? How does the video get to the phone? Even if you found a WiFi backup camera, you'd need to be running a hotspot on the phone, and the time it would take to connect would be unreasonable - head units only take a second or so to display when you start backing up.
Finally, what's the app which ties it all together? Even if there were solutions for the first two, simply buying an AA head unit would be cheaper than paying for an app to be developed. So, why not just buy a head unit? Or even just a backup camera solution with its own screen?