Related
can the evo do video output via rca cable? i.e. the red yellow and white?
It sure can!
http://www.google.com/products?q=hdmi+to+composite&um=1
I was also wondering about this. Does the cable work for the droid incredible work with a evo.
Heres a youtube with the incredible using the cable.
http://www.youtube.com/watch?v=eJyt463AoOA&feature=player_embedded#!
The droid incredible use mini usb and with the wirefly video, a htc act100 tv out cable. The Evo have micro-hdmi type D to hdmi. I not sure there a micro-hdmi to rca tv-out cable.
chinot66 said:
The droid incredible use mini usb and with the wirefly video, a htc act100 tv out cable. The Evo have micro-hdmi type D to hdmi. I not sure there a micro-hdmi to rca tv-out cable.
Click to expand...
Click to collapse
The incredible has a micro-usb slot too, just like the Evo
anyone try the incredible cable out with an evo yet?
not same connector.
It's a feature of the Incredible, not the EVO.
Besides, HDMI out better...lol
Yes, you can get a converter to go from Micro HDMI to HDMI to Composite, but they aren't cheap. The reason is that Composite is an analog signal and HDMI is digital. HDMI carries both high definition video and surround sound audio on a single line.
So, you're going to lose image quality and you're going to spend a fair amount of money (I believe) to convert the signal.
If you don't have a TV with an HDMI port, that would be what you need to work on, not changing the signal from the phone. All new devices use HDMI now, it's the standard.
evo RCA cable
I'm not sure if this thread has closed. I have a similar question. I had the touch pro and bought the factory wire that was usb to RCA (red, white, yellow). I have the evo now and need a similar wire. Reason being is i have my car navigation modified to accept a video source, but its input is the yellow RCA, not HDMI. Does anyone know if they will make a cable similar to the touch pro or if there is some kind of dongle or converter piece that can be used.
Thanks
gredenko said:
I'm not sure if this thread has closed. I have a similar question. I had the touch pro and bought the factory wire that was usb to RCA (red, white, yellow). I have the evo now and need a similar wire. Reason being is i have my car navigation modified to accept a video source, but its input is the yellow RCA, not HDMI. Does anyone know if they will make a cable similar to the touch pro or if there is some kind of dongle or converter piece that can be used.
Thanks
Click to expand...
Click to collapse
+1
i would like to do that with my evo too.
edit #1
actually, it want it to output google maps and pandora mainly, so maybe i'll have to wait for the final cyanogen rom and a hdmi to composite adapter...that doesn't sound like fun at all. Did we ever figure out if the micro-to-rca cable from the incredible even works for the evo? I would buy one just to find out...
google, here i come...
found one!
edit #2
this guy said he already bought the cable and "it doesn't fit in the evo's usb port". That doesn't really make any sense though, does it... Hmmmmm.
Maybe it does, i remember the port looked a little goofy on the droid inc. oh well, c'est la vie.
edit #3
man, i'm on fire today i guess. No one really cares probably, but here is the difference:
+ 1 for this.
The HDMI port is mostly useless for me. I use my video out on the TP2 for a screen in the car that my kids watch, or my projector (neither of which support HD).
One of the reasons I'm considering the EVO versus any other Android offering is because I actually use the TV out on my current phone, and most other phones don't offer this. But it appears that I'm no better off (buying a bulky composite converter is out of the question). This is soooo disappointing!
The incredible can do something the EVO can not?! tsk tsk...
The incredible can do something the EVO can not?! tsk tsk...
Click to expand...
Click to collapse
lol come on now. My VCR has composite out, but that doesn't mean my blu-ray player should.
I saw another thread on this issue but its old so i'm not sure if its closed. Here is my issue.
I had the touch pro and bought the factory wire that was usb to RCA (red, white, yellow). I have the evo now and need a similar wire. Reason being is i have my car navigation modified to accept a video source, but its input is the yellow RCA, not HDMI. Does anyone know if they will make a cable similar to the touch pro or if there is some kind of dongle or converter piece that can be used.
Thanks
probably gotta buy a converter box that converts between digital(hdmi) and analog(RCA) signals.
I have not been able to find one as I would like to have this as well. *BUMP*
A cable can't simply convert the digital HDMI signal into an analog composite one. You need to buy a converter such as this one:
http://www.amazon.com/GefenTV-HDMI-to-Composite-Scaler/dp/B0013LTNF8
Converting HDMI to composite unfortunately takes more than a simple adapter. You can find a scaler/scan converter that will do it but they are not cheap.
http://www.bhphotovideo.com/c/produ...IDS_GTV_HDMI_2_COMPSVIDS_GefenTV_HDMI_to.html
edit: Oh snap! I was too slow
thanks for the quick replies...ya, if it requires a converter that expensive, probably not worth it...that sux...
I guess your intention is to feed a larger screen with the video from your Evo? Might be better to just get a small LCD panel that accepts HDMI in at that point.
ya, that was my original intention...ya, getting an LCD screen is def. the better option than paying for an expensive converter.
Hi everyone
Is there any cables out there that either fit directly into the phone or through the dock thar output to rca or similar, as most tv's on the road or b&bs don't have a hdmi port.
Seen a mini hdmi to rca cable, but is the port on the atrix/dock a mini hdmi or some moto hybrid port.
Any info sure would make trips on the road better than STD tv rubbish.
Thanks.
I purchased an hdmi to dvi+1 connector. maybe you can get a dvi to vga than to rca and so fourth. Just trying to help. I know its a little extra but hey.
Sent from my MB860 using XDA App
wont work without a box to convert the digital to analogue, the reson dvi-vga works on pcs is because dvi can also carry an analogue signal, but that wont help in this case
HDMI is digital, RCA is analogue. You cannot feed a digital signal into something that's analogue. You need some sort of a converter box. Too expensive of a process in my opinion.
Its easier for digital gadgets to produce HDMI signals because the signal is decoded in the device that's receiving it. Analogue signals require an output with some strength to be able to make it to the receiving end----requires more power and hardware.
eatkabab said:
HDMI is digital, RCA is analogue. You cannot feed a digital signal into something that's analogue. You need some sort of a converter box. Too expensive of a process in my opinion.
Its easier for digital gadgets to produce HDMI signals because the signal is decoded in the device that's receiving it. Analogue signals require an output with some strength to be able to make it to the receiving end----requires more power and hardware.
Click to expand...
Click to collapse
correct. you could go with a MicroHDMI to HDMI, connect an HDMI to DVI+ adapter, and a headphone jack to RCA or headphone jack to headphone jack for audio, as DVI+ does not carry audio like HDMI does.
There are small portable DAC converters. they cost about $100. i have 2 for different studio equipment, but i would never use it for something like this.
eatkabab said:
HDMI is digital, RCA is analogue. You cannot feed a digital signal into something that's analogue. You need some sort of a converter box. Too expensive of a process in my opinion.
Its easier for digital gadgets to produce HDMI signals because the signal is decoded in the device that's receiving it. Analogue signals require an output with some strength to be able to make it to the receiving end----requires more power and hardware.
Click to expand...
Click to collapse
Uh...............thanks!... : /
Sent from my MB860 using XDA App
Thanks for the replies guys, so I am guessing this item wouldnt have done the job ??
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=110712983212
What is the conector on the Atrix that outputs to hdmi ?
Thanks
I would settle for HDMI -> Fiber Optic Audio
I don't know if that is possible... cause the audio out on HDMI is only triggered most likely by video out. I have an HDMI to DVI converter, and it puts out video, but doesn't put out sound since DVI can't handle sound. The video pinout is the same. The sound plays through the phone. Which makes me think that audio only would not trigger HDMI.
Yeah, I understand what you're saying, they sell black box type of deals but would like a solution cheaper than the phone itself. Not supremely important, would just be nice.
pgunning1 said:
Thanks for the replies guys, so I am guessing this item wouldnt have done the job ??
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=110712983212
What is the conector on the Atrix that outputs to hdmi ?
Thanks
Click to expand...
Click to collapse
Would love to just use hdmi but most tv in hotels/b&B's are just scart & rca. Is the output a mini hdmi or something else on the atrix, if it is I'll buy one just to try.
ATV
Paul
I've been searching and I'm not finding any real answers which leads me to believe that it won't be possible without a digital converter box. I'm looking for some type of analog out adapter for my S3. I would like to hook it up to my car's in-dash head unit which does not support HDMI. Now a days a regular micro usb port on these phones seem to be used for every purpose. I do want video. Has anyone had any luck?
EDIT: This post started with 6 adapters and has dwindled down to just 3. I'm surprised to find the S3 VGA adapter but this is the digital to analog converter I need. The total cost is about $30. I pulled the trigger and will update you guys in a few weeks once it arrives.
Samsung Galaxy S3 S III i9300 MHL Micro USB 11p to VGA
http://www.ebay.com/itm/Sam-sung-Ga...372122?pt=PDA_Accessories&hash=item3a7a349f1a
VGA to Composite
http://ebay.com/itm/PC-VGA-to-TV-S-...=US_Audio_Cables_Adapters&hash=item337c25cbe6
3.5mm to Composite
http://ebay.com/itm/3-5MM-Male-Audi...=US_Audio_Cables_Adapters&hash=item45faa58acf
Edit: Wow I feel dumb... You can't convert from VGA to Composite without a converter box. What a waste. I was focusing on the conversion from digital to analog and didn't consider the encoding is different... The VGA out does however work with my HDTV. It's not great though. The output is fixed at the 720p resolution which means it uses about 1/3th of my 1080p screen. The screen flickers occasionally too. Sometimes it won't even work without a minute of messing with the cables. The screen is just staticy until I get it right. It has however gotten better so maybe it needed to break in or something. Either way, I guess I'm going to buy an HDMI to Composite converter box instead.
Moved to first post.
Heck, a raspberry pi is cheaper than these converter boxes and it's a full computer.
Moved to first post.
I'd be I interested in one of these too. For the same reason
Sent from my Nexus 7 using Tapatalk 2
Anyone ever used one of these? I'm curious if the micro usb port will both charge my phone and power the converter.
Use this:
http://www.ebay.com/itm/271014996085?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Got good reviews on amazon, im planing to buy one soon
0mega007 said:
Use this:
http://www.ebay.com/itm/271014996085?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Got good reviews on amazon, im planing to buy one soon
Click to expand...
Click to collapse
Seems nice! Waiting for feedback...
http://www.amazon.com/gp/product/B0080KN18K/ref=ox_sc_sfl_title_1
Here are the reviews on amazon
0mega007 said:
Use this:
http://www.ebay.com/itm/271014996085?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Got good reviews on amazon, im planing to buy one soon
Click to expand...
Click to collapse
That's the guy I was looking at first but you have to buy a 5 to 11 pin adapter, an MHL HDMI cable, and then the converter. That's around $50. The VGA adapter will only run you $30.
http://www.ebay.com/itm/Sam-sung-Ga...jectors-Adapter-/251158372122?#ht_5213wt_1163
Wow I feel dumb... You can't convert from VGA to Composite without a converter box. What a waste. I was focusing on the conversion from digital to analog and didn't consider the encoding is different... The VGA out does however work with my HDTV. It's not great though. The output is fixed at the 720p resolution which means it uses about 1/3th of my 1080p screen. The screen flickers occasionally too. Sometimes it won't even work without a minute of messing with the cables. The screen is just staticy until I get it right. It has however gotten better so maybe it needed to break in or something. Either way, I guess I'm going to buy an HDMI to Composite converter box instead.
Raspberry Pi
Hopefully people are still reading this... Someone had mentioned a Raspberry Pi... How would I go about using that to connect my phone to my car system to get video? any ideas anyone?
What car system do you have? What kind of input methods are available? What are you trying to achieve?
shamez23 said:
What car system do you have? What kind of input methods are available? What are you trying to achieve?
Click to expand...
Click to collapse
I have an Avic Z1 in my car. The video inputs are just RCA/Component cables... no high-def. I essentially just want to be able to play movies off my phone onto my screen/sound system in my car. I have a Raspberry Pi sitting around; I've never used it though, so no idea what to do with it. I'm hoping I can use that so I don't have to buy anything else. Any ideas?
Well, the Pi does have RCA output. So you could connect it to your Z1. The Pi is a little computer on its own. You could just use it instead of your phone and put your movies on a sd card or a thump drive. It is possible to use the Pi as a dlna device and your phone as a dlna server that transmits movies to the Pi which in turn outputs the video to your Z1. That however isn't the easiest of feats. It takes a lot more effort than a plug and play solution like a hdmi to RCA converter box would.
The Pi is linux based and I don't use Linux. So I don't know if Linux can work with the MPA or whatever that standard is named, that the S3 uses instead of the standard older phones are using which makes them appear on a computer like a harddrive when connected via USB. If Linux can work with the S3 you could just connect it and use it as a Harddrive, using the computer system of the Pi to navigate content on your phone. Would be a lot easier than streaming.
Anyway, there are a couple of ways you could use the Pi but none of them are easy out of the box solutions. The Pi is more of a developer device at least when you want to do more than what the Linux distributions that are available can offer. There are some that offer that DLNA feature I was talking about. Look for XBMC, there are Videos on Youtube. All those solutions aren't plug and play. If you like playing with computers and figuring out stuff, make it work, this should be fun for you. If not, you better think of something else to do with your time.
Edit:
Looked it up. It's called MHL, not MPA.
Plug and Play would be to use one of those:
http://www.amazon.com/Sanoxy-HDMI-Composite-S-Video-Converter/dp/B0047PDBP0
You'd also need a MHL Cable that turns your Micro USB out to a HDMI out, Plug it into the converter and said converter into your Z1. Once you've set that up with all the cables needed (quite a lot of cables going on there), it will be plug and play in the future.
Not cheap, so it depends on how often you are going to use it, if it's a worthwhile endeavor.
shamez23 said:
Well, the Pi does have RCA output. So you could connect it to your Z1. The Pi is a little computer on its own. You could just use it instead of your phone and put your movies on a sd card or a thump drive. It is possible to use the Pi as a dlna device and your phone as a dlna server that transmits movies to the Pi which in turn outputs the video to your Z1. That however isn't the easiest of feats. It takes a lot more effort than a plug and play solution like a hdmi to RCA converter box would.
The Pi is linux based and I don't use Linux. So I don't know if Linux can work with the MPA or whatever that standard is named, that the S3 uses instead of the standard older phones are using which makes them appear on a computer like a harddrive when connected via USB. If Linux can work with the S3 you could just connect it and use it as a Harddrive, using the computer system of the Pi to navigate content on your phone. Would be a lot easier than streaming.
Anyway, there are a couple of ways you could use the Pi but none of them are easy out of the box solutions. The Pi is more of a developer device at least when you want to do more than what the Linux distributions that are available can offer. There are some that offer that DLNA feature I was talking about. Look for XBMC, there are Videos on Youtube. All those solutions aren't plug and play. If you like playing with computers and figuring out stuff, make it work, this should be fun for you. If not, you better think of something else to do with your time.
Click to expand...
Click to collapse
Interesting... I'll have to look into all that.. My only concern is then I'd have to keep a mouse and keyboard in my car at all times, correct? I was hoping I could just play something on my phone and it would appear on my car screen. I'll youtube the stuff you mentioned and see what works. Thanks a lot!
I was hoping I could just play something on my phone and it would appear on my car screen.
Click to expand...
Click to collapse
Well, the converter box would do that.
With the Pi being a real computer however, some kind of input device will be necessary. Using the Pi is kind of a long shot anyway. It's possible but it's not what the Pi is intended for. It usually is easier and more user-friendly using a dedicated system instead of something cobbled together.
shamez23 said:
Well, the converter box would do that.
With the Pi being a real computer however, some kind of input device will be necessary. Using the Pi is kind of a long shot anyway. It's possible but it's not what the Pi is intended for. It usually is easier and more user-friendly using a dedicated system instead of something cobbled together.
Click to expand...
Click to collapse
Haha.. that's what I figured. Thanks a lot!
I have the old tvout cable from s1....is it good?
But I can't find the tvout settings in the phone...
Sent from my Samsung Galaxy S3 GT-i9300 using TapaTalk2
No. The S3 has it's own cable and it's different than the ones from the S1 or S2. There is an adapter available but that one usually costs nearly as much as a new cable from ebay.
Also, depending on your ROM, TV-out may not work at all. There is no TV-out on Cyanogenmod ROMs for example.
I need to find a way to output video to AV input so i can connect my note 2, to my stereo in my car any clue how i can do this?
Just use a Left Right channel to 3.5mm wire...
EDIT: Oh... For video I think we only support HDMI but there might be a dongle you could buy..
Sent from my SPH-L900 using xda premium
You'll need to output hdmi via mhl, then use a hdmi > AV adapter to connect to the radio.
☆SoA: Son's of Android™☆
I like to break stuff!
What Evil said ^^^^
Sent from my SPH-L900
Thanks for the help all the hdmi > AV adapters i cant find have to be powered anyone know of any that dont need power or i can power from a usb maybe? thanks.
vwgti18 said:
Thanks for the help all the hdmi > AV adapters i cant find have to be powered anyone know of any that dont need power or i can power from a usb maybe? thanks.
Click to expand...
Click to collapse
Best thing to do is buy an AC> DC power inverter for your vehicle. I use one to charge my note 2. They turn the 12v cigg lighter into a 120v wall outlet.
☆SoA: Son's of Android™☆
I like to break stuff!
This is one thing that sucks on newer devices. I remember on my HTC Touch Pro and TP2 you could just plug into your deck using the rca inputs. It was nice to be able to play stuff off your phone directly to the monitor.
Plus because I kept the cables in my car, it was easy to take in a house and plug in and play videos and pictures. I did this all the time for my Grams, to show her my little ones. She was never into newer HD tv's lol. Oh well, I'm sure HDMI connections will be really available on decks before you know it.
Sent from my Mackafied Sprint Galaxy Note II using XDA Premium.
KB112 said:
This is one thing that sucks on newer devices. I remember on my HTC Touch Pro and TP2 you could just plug into your deck using the rca inputs. It was nice to be able to play stuff off your phone directly to the monitor.
Plus because I kept the cables in my car, it was easy to take in a house and plug in and play videos and pictures. I did this all the time for my Grams, to show her my little ones. She was never into newer HD tv's lol. Oh well, I'm sure HDMI connections will be really available on decks before you know it.
Sent from my Mackafied Sprint Galaxy Note II using XDA Premium.
Click to expand...
Click to collapse
A lot of the new decks already have hdmi pigtails in the back or hdmi ports in the front.
☆SoA: Son's of Android™☆
I like to break stuff!
-EViL-KoNCEPTz- said:
A lot of the new decks already have hdmi pigtails in the back or hdmi ports in the front.
☆SoA: Son's of Android™☆
I like to break stuff!
Click to expand...
Click to collapse
Yeah I have seen some, but I mean it's not quite mainstream yet. At least not enough for me to switch out decks! Lol
Sent from my Mackafied Sprint Galaxy Note II using XDA Premium.
vwgti18 said:
I need to find a way to output video to AV input so i can connect my note 2, to my stereo in my car any clue how i can do this?
Click to expand...
Click to collapse
You can find plenty of HDMI to RCA adapters on the internet. The problem is that HDMI is a digital signal, and RCA is analog. And from your picture, your device is looking for an analog signal. Hence, you need to get something to convert the HDMI signal into an Analog one. They exist, but are not cheap. The cheap ones, not used, are $200. Require a power source. And we haven't even touched is the phone's video output going to be accepted by the stereo's video input. If the video output doesn't match--resolution and refresh rate--you're not going to have a picture. On PCs, you can these settings in the video control center or use special applications. For Android, I don't think they exists because the TVs with HDMI are new enough that a designed to accept the video phones are putting out; the phone are also designed to output video HDTV will accept.
Never mind you'll still need some kind of car charger to power the HML adapter. In my experience, using your phone and HML, will drain your battery, although slower because it doesn't need all the 2.0mha the charger puts out, but doesn't give the phone enough power to maintain it's current charge status.
The other issue, it's hard to find converters for HDMI to composite RCA. Not many people are in demand for them since a lot of the old TVs that only had those inputs are gone. They exists though.
That all said, my question would be exactly what applicaitons or tasks are you trying to don on your GN2 though your car deck? If it's just play music or audio into it, If so, then just get a 3.5mm to RCA cable. They can be purchased for a couple dollars. Here's a link for Monoprice.com: http://www.monoprice.com/products/subdepartment.asp?c_id=102&cp_id=10218. Just make sure you get a male to male version. There are options as well, depending your car deck. If it has a casette deck, you can get 3.5mm caasette adapter. If you want more robust, you can get a 3.5mm FM car cigarette transmitter such as Coby CA 745; the problem is you need to have a clear FM station, which can change depending on your geographical location. I like that model because you can change FM to be used, and has cigarette charge port. The benefit, you're not dependent on the car having any kind of audio output ports, or cassette player.
If you're wanting to play video, ie use the mirroring function of the phone, I'm thinking you be much better served with a newer car deck that can support HDMI video in. Heck, depending on the screensize of you deck, it may be better just to get a car dock for the GN2 and just send the audio through your car stereo. Another alternative, use the Wifi hotspot function of the GN2 and use a tablet. I'm not saying I've ever used the GN2 to use Google Navigation and my 10" tablet to have NHL Center Ice going while driving to a meeting an hour away, but you can see how it can be done:
I've seen some pretty creative mounting methods use with the Nexus 7.
Hopefully this was helpful
lovekeiiy said:
You can find plenty of HDMI to RCA adapters on the internet. The problem is that HDMI is a digital signal, and RCA is analog. And from your picture, your device is looking for an analog signal. Hence, you need to get something to convert the HDMI signal into an Analog one. They exist, but are not cheap. The cheap ones, not used, are $200. Require a power source. And we haven't even touched is the phone's video output going to be accepted by the stereo's video input. If the video output doesn't match--resolution and refresh rate--you're not going to have a picture. On PCs, you can these settings in the video control center or use special applications. For Android, I don't think they exists because the TVs with HDMI are new enough that a designed to accept the video phones are putting out; the phone are also designed to output video HDTV will accept.
Never mind you'll still need some kind of car charger to power the HML adapter. In my experience, using your phone and HML, will drain your battery, although slower because it doesn't need all the 2.0mha the charger puts out, but doesn't give the phone enough power to maintain it's current charge status.
The other issue, it's hard to find converters for HDMI to composite RCA. Not many people are in demand for them since a lot of the old TVs that only had those inputs are gone. They exists though.
That all said, my question would be exactly what applicaitons or tasks are you trying to don on your GN2 though your car deck? If it's just play music or audio into it, If so, then just get a 3.5mm to RCA cable. They can be purchased for a couple dollars. Here's a link for Monoprice.com: http://www.monoprice.com/products/subdepartment.asp?c_id=102&cp_id=10218. Just make sure you get a male to male version. There are options as well, depending your car deck. If it has a casette deck, you can get 3.5mm caasette adapter. If you want more robust, you can get a 3.5mm FM car cigarette transmitter such as Coby CA 745; the problem is you need to have a clear FM station, which can change depending on your geographical location. I like that model because you can change FM to be used, and has cigarette charge port. The benefit, you're not dependent on the car having any kind of audio output ports, or cassette player.
If you're wanting to play video, ie use the mirroring function of the phone, I'm thinking you be much better served with a newer car deck that can support HDMI video in. Heck, depending on the screensize of you deck, it may be better just to get a car dock for the GN2 and just send the audio through your car stereo. Another alternative, use the Wifi hotspot function of the GN2 and use a tablet. I'm not saying I've ever used the GN2 to use Google Navigation and my 10" tablet to have NHL Center Ice going while driving to a meeting an hour away, but you can see how it can be done:
I've seen some pretty creative mounting methods use with the Nexus 7.
Hopefully this was helpful
Click to expand...
Click to collapse
Yea thanks for your input. I was just about to order this http://www.amazon.com/gp/offer-list...l?ie=UTF8&colid=&coliid=&me=&qid=&seller=&sr=
and this
http://www.amazon.com/gp/product/B00A9H30LU/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
and see if i can get it to work but after u said all that idk if i really want to risk spending the $50 what do u think?
As for buying a new deck thats out of the question i just got the new late 2012 model JVC.
I already do music. I wanted video so i can play movies and play youtube but mostly wanted my google maps to show on the big screen so i could just tuck my phone away.
The HML cable is a decent price. You may it to be useful for showing off pictures or videos at home or at friends' on the TV rather than the phone. I see the cable still being useful if what your propose doesn't work out.
I can't so for certain if it's going work. It looks promising. I like the Eleckcity has 60 positive reviews (4 or 5 stars) out of 78. Fifty dollars isn't a bad cost. I would just check the return the policy. I would write Eleckcity and ask about returns if they product doesn't work or as expected. Also, there is a review who used it in a similar manner that you're trying to do. I would definity write that person to find out more details on the headunit and so forth.
The only thing I would be weary about is powering the Eleckcity. Since it doesn't have it's own powersouce, it's going to draw it's power from the USB. I don't know for certain, but I don't believe the USB power on the GN2 sends out power. If it does, I don't think it's much. It's only used the OTG USB cable with items that had their power. And the MHL has as power supply. If it doesn't power it, I think a simple USB powerhub could do the trick. I'm sure there is probably some kind of cigarette car adapter usb hub that could found or the like.
I understand the goal. I don't know how much effect and cost is worth it for you to how often you would use the maps and video features on your deck's screen. In looking at some of the JVC multimedia head units, screen size isn't very larger since they range 6.1" to 7". So I put eh screen size as negligible factor, by my standards. Obviously, use the headunit's screen would be more elegant look, espically compared to having three windowshield/dashboard car docks, a 150W USB cigarette car power inverter, and cables hanging in from of the dash; one is the for the satellite radio. Then again, I only need that stuff about once every six months. So, maybe a simple dock such as iOttie or Clingo may work well with a car charger for phone if you only plan to use it say, once a month or less. T
The last paragraph is just proposed plan B and C, and so forth.