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I'm thinking about making a Droid Eris video out app...Need Help

Hi all. Bear with me as I'm new to the dev community for the Android OS.
Basically the story so far is I've got a Droid Eris. I saw that there is a cable available called the Act100 Video Cable by HTC. This cable plugs into the mini usb port of the phone and outputs a composite video and left and right audio signal, yellow red white cables. I have a TV in my car that accepts composite input.
Through some research I've found that the Eris does not support this video out function. A supported phone for example is listed as the HTC Touch Pro 2 on sites where you can buy the cable. I've read in forums where people have mailed HTC about eris video out compatibility and HTC said that it isn't in the software by default but to try and search for an app that enables it. Therefore, the hardware supports it but it simply isn't an option in the software. So I want to make an app that simply enables the feature on the Droid Eris.
This is where my questions start. I've had only limited C++ programming experience so I'm prepared for any learning curve. How difficult do you think it would be to make an app like this? I know of some begginer guides but beyond that where should I begin?

How do you find out that the hardware does, in fact, support this? I would think if this were possible it would have been made by now, but I'd love to be wrong.

I'm not 100% sure the hardware supports it. I just made a guess because in the post I read HTC support tells the guy to look for an app that enables it becuase it isn't in the software by default. It sounds like it might just have to be coded in. At leat I'm really hoping it can be.

Sounds fishy to me. Every portable device I've ever used with a TV out function required a hardware decoder specifically for a TV. This can be done in software I'm sure but the other issue I find is pushing it out over the USB jack. Analog video source pushed out through a USB chipset doesn't sound like it can be done. I'm not all that knowledgeable about the Eris' hardware specifics so don't quote me.
As far as a pure software app that will do it, that raises red flags as well. As far as I know apps on a stock ROM run in a Dalvik VM I believe. They're separated from the system itself, and it's the system that controls the hardware. It might be able to be done but I doubt it.
The Touch Pro 2 might have the ability to do it maybe through hardware, but as far as I know the Eris doesn't have any of that.
I'll let somebody with more hardware knowledge come in.

Thanks for the ideas so far. Well since the touch pro 2 can output video over usb it's obviously possible to push the signal over any other USB. It would just be a matter of, as you said, the Eris having the hardware. I guess I was under the impression that the hardwares were very similar. I'm really trying to investigate this as much as possible and no one even answered me on other forums. Please keep this thread alive!

I don't know for sure if this can work, but here are my thoughts. PDANet sends data over the USB port to enable wired tethering, so an app can send data over the USB port.
So since we know we can send/receive data over the USB port, we must address the issue of video output. I don't know if this will be easy because of the way USB->Composite converters probably work (read output of the USB pins into each of the Red, White, Yellow pins). What would potentially make this difficult would be that with Dalvik I don't know if we can control what pins we are outputting our data to.
If someone wants to post more information on how the video cable works it would be easier to determine if it is possible.

Check this out. The Droid Incredible does it over microUSB. I wonder if all we need is the right cable.
http://www.youtube.com/watch?v=eJyt463AoOA

I would love to see you make an app for this if its possible. Is there an option on stock incredible for this or is it an app?

Nindoja: Yea I agree pin control is probably going to be important for something like this. I would prefer not to, but would rooting allow us to get around the Dalvik restriction you mentioned if it ends up being a problem?
ihtfp69 and conap: I did see that the incredible does the tv out over usb. I'm not sure wether it is an option or an app though... I also read that the incredible's files were leaked, including one called tvout.apk. I think I read that just trying to install it on the eris doesn't work but I'm really not sure. In the least having that file to work with might be a great start.
I haven't been able to find that file yet unfortunately. How similar are the Incredible and Eris hardware? If they are similar it could be good news for a software solution.
Thanks for the replys so far! Any other thoughts?

Has there been any development on this?

nope, none public at least

Bumpity bump bump. this needs to happen!
Sent from my Eris using XDA App

Theoretically couldnt One figure out what app and supporting files the incredible uses and then Just Port those files to the eris. Just like people have done with the gallery Candy genie apps?
Sent from my ERIS using XDA App

Izeltokatl said:
Theoretically couldnt One figure out what app and supporting files the incredible uses and then Just Port those files to the eris. Just like people have done with the gallery Candy genie apps?
Sent from my ERIS using XDA App
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Did you read the thread at all? The problem isn't only software.... the apps the incredible (and other phones that have video out) use make extensive use of dedicated hardware to output the video stream.
We don't have that on the eris, so that would be really hard, and very slow, to emulate in software. That's assuming it could even be done over our USB port.

shouldnt be that hard, the same thing has been done for PSP...although its USB video out to PC.
its probably a step in the correct direction.
goto youtube.com and search for 'remotejoylite' one word, should be second video down, shows it in action via usb cable.

nindoja said:
That's assuming it could even be done over our USB port.
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Am I missing something, but haven;t at least three comments made before this one confirmed, several phones have video out, via USB. I think the assuming iot is possible part is over. The real question that no one has answered is if the Eris has the hardware to support this option. I don't have an answer, but wanted to point out that the possibility of video over USB has been answered.

If you look on Google you can find the tvout.apk and tvout.odex from the Incredible dump. Might be able to do something with it.
Sent from my ERIS using XDA App

Here is TVout.apk and TVout.odex
http://forum.xda-developers.com/attachment.php?attachmentid=319214&d=1272756479
I think with the right cable and the right software we can get this to work.
We might also need system/lib/libTVOUT.so
From what I can tell, on a stock ROM the TV out functionality is provided by system/app/TVOUT.apk and a system/lib/libTVOUT.so
here is a link to a forum about the MyTouch and the tvout.apk and cable:
http://forum.xda-developers.com/showthread.php?t=454333

mjgdroid said:
Here is TVout.apk and TVout.odex
http://forum.xda-developers.com/attachment.php?attachmentid=319214&d=1272756479
I think with the right cable and the right software we can get this to work.
We might also need system/lib/libTVOUT.so
From what I can tell, on a stock ROM the TV out functionality is provided by system/app/TVOUT.apk and a system/lib/libTVOUT.so
here is a link to a forum about the MyTouch and the tvout.apk and cable:
http://forum.xda-developers.com/showthread.php?t=454333
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Question.
Has anyone seen this work?
How do you make it work?
Do you select it from the launcher?
Is it in settings?
Because we would have to find a work around if it is.
Or just add it to the menu.
Ha.
Sent from my ERIS using XDA App

KHancock321 said:
the Incredible dump.
Sent from my ERIS using XDA App
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Sent from my nonsensikal froyo using XDA App

Are the Nook Color that are currently on shelves still rootable?

Sorry I haven't been keeping up with the nook development history and NC changes.
is it still rootable? Honeycomb still possible? I'm thinking about installing the rooted NC into my car for use as GPS/Pandora/etc. I will be tethering it to my thunderbolt via wifi, and I think someone said it was possible to share my phone's GPS with the NC via BT?
Thanks guys.

referendum said:
Sorry I haven't been keeping up with the nook development history and NC changes.
is it still rootable? Honeycomb still possible? I'm thinking about installing the rooted NC into my car for use as GPS/Pandora/etc. I will be tethering it to my thunderbolt via wifi, and I think someone said it was possible to share my phone's GPS with the NC via BT?
Thanks guys.
Click to expand...
Click to collapse
Short root answer: Yes
Long root answer: Here
Honeycomb is a yes still but since the source hasn't been released its still just a customized SDK test image to my (limited) knowledge.
As for the GPS I've got no idea and will defer to more knowledgeable people here.
- Aerlock

Yes, you can share the GPS on your phone to the nook with an app called TetherGPS

Why would you tether GPS to you NC from your phone if your phone is right there? Just to say it can be done or is there a useful reason?
Sent from my NookColor using XDA Premium App

An educated guess would be, bigger screen...

Ahhhh
Sent from my NookColor using XDA Premium App

chefdave12118 said:
Ahhhh
Sent from my NookColor using XDA Premium App
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Yes, like I mentioned in my first post. I plan on integrating the NC into my car's map compartment (exact fit!) and connecting it via the headphone jack to the car's stereo. I'd like to use it as a GPS while driving, along with web access for passengers, music, movies, etc.
Thanks for the info guys.

referendum said:
I plan on integrating the NC into my car's map compartment (exact fit!) and connecting it via the headphone jack to the car's stereo. I'd like to use it as a GPS while driving, along with web access for passengers, music, movies, etc.
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Cool idea! (Sorry for being OT) I currently have a CarPC (Roadrunner on Windows) and was thinking the other day what a cool, and inexpenive, carpc the NC would make!
Only challenge is finding a decent (car tailored) front-end for Android. Any thoughts?

ramiss said:
Cool idea! (Sorry for being OT) I currently have a CarPC (Roadrunner on Windows) and was thinking the other day what a cool, and inexpenive, carpc the NC would make!
Only challenge is finding a decent (car tailored) front-end for Android. Any thoughts?
Click to expand...
Click to collapse
Car Home
http://forum.xda-developers.com/showthread.php?t=928697

The stuff on the shelf now is rootable using the Manual process listed previously, but it seems as though B&N started changing the partition sizes on the NC and loading custom ROMs fail because CWM throws an error when doing a system wipe/factory reset.
http://forum.xda-developers.com/showthread.php?t=1077973

3G Dongle on Nexus 7

Guys before a week I head read somewhere it is possible to make your 3G dongle work on the N7. However this was before I rooted my device. Now I have it rooted, I have bought an OTG cable and a 3G dongle. Can someone please provide me with a link which works? Thanks a lot..

Anyone?

might wanna check the dev section, there are a few threads about that.

This worked for me:
http://forum.xda-developers.com/showthread.php?t=1894999
Sent from my Nexus 7 using XDA Premium HD app

jshashwat93 said:
Guys before a week I head read somewhere it is possible to make your 3G dongle work on the N7. However this was before I rooted my device. Now I have it rooted, I have bought an OTG cable and a 3G dongle. Can someone please provide me with a link which works? Thanks a lot..
Click to expand...
Click to collapse
Trevd has written a great guide on how to integrate 3gdongle support w/o needing a third party app. I added it to my tool, auto-patcher, which installs the function on any ROM with one command.
You can use the patcher on any PC, osx, Linux or windows. Windows even has a GUI. It is easy and way better than keeping uneccessary apps in your memory all the time.

wats the process fa unrooted devices

[Q] Oppo Find 5 vs UMS vs Kenwood BT51U

Hi, this is my first thread on this forum, i have Oppo Find 5 a great smartphone Android but i have a problem not about the phone but i think the OS.
I have Find 5 with Paranoid 3.99 based on Android 4.3 and i want to connect phone with my Kenwood KDC-BT51U via cable. The problem, if i understand, is that the latest version of Android don't support Usb Mass Storage but only MTP or PTP and i can't use my phone neither like a USB Key! I have installed APK from this post -> [APP] USB Mass Storage for Ice Cream Sandwich & Jelly Bean [v.1.2.0-pre - 02.02.2012] but just attack cable the device is not recognized and enable UMS secondly through APP does not solve the problem. I have installed Kenwood Music Control but work only through UMS.
Can someone help me?
Thanks in advance!

Why not use A2DP?
Sent from my Find 5 using Tapatalk 4

maxwen said:
Why not use A2DP?
Sent from my Find 5 using Tapatalk 4
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Because Kenwood kdc-bt51u have bluetooth only for telephone and not for music with A2DP, I've tried to connect music with telephone through BTmono but the quality is very low! I need to use telephone like usb key is this stupid for Android developers?

Fiendish1989 said:
Because Kenwood kdc-bt51u have bluetooth only for telephone and not for music with A2DP, I've tried to connect music with telephone through BTmono but the quality is very low! I need to use telephone like usb key is this stupid for Android developers?
Click to expand...
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The answer is short and you will not like it. UMS is deprecated from Google for android since 4.2 and it will not come back
Sent from my Find 5 using xda app-developers app

maxwen said:
The answer is short and you will al not liksomething is deprecated frogle for android since 4.2 and it will not come back
Sent from my Find 5 using xda app-developers app
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Sorry but there isn't a solution? Fix with app or terminal typing something? I can't change my usb support every time that Android team decide to change protocol! Ipod use the same support/protocol from first dispositive to iPhone 5s! And is proprietary no like UNIVERSAL SERIAL BUS....

If you need UMS that bad, you may go back to the Oppo's stock rom.

AngryHapposai said:
If you need UMS that bad, you may go back to the Oppo's stock rom.
Click to expand...
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Sorry if I bought an Android phone thinking that with an open source we will solve the problems. The solution to stay with the stock rom does not make sense... for a maximum stay iOS6 iphone rather than ios7 but for open os not conceive! So if you have to tell me banality solutions like never update I don't need to listen one more time thanks...

Fiendish1989 said:
Sorry if I bought an Android phone thinking that with an open source we will solve the problems. The solution to stay with the stock rom does not make sense... for a maximum stay iOS6 iphone rather than ios7 but for open os not conceive! So if you have to tell me banality solutions like never update I don't need to listen one more time thanks...
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I believe that you can get USM to work with android 4.2 and above AOSP builds if you have an sdcard, with out an sdcard, the app you tried or any setprop tweaks simply will not work. This maybe something that can be fixed in the ROM or kernel, but you will just have to wait and see.
This is just one of those problems of progress, with the progression of android the cost was USM...if you had gone through the progression of iPhones, your cost would have been a new "USB cable" with each device....

justmpm said:
I believe that you can get USM to work with android 4.2 and above AOSP builds if you have an sdcard, with out an sdcard, the app you tried or any setprop tweaks simply will not work. This maybe something that can be fixed in the ROM or kernel, but you will just have to wait and see.
This is just one of those problems of progress, with the progression of android the cost was USM...if you had gone through the progression of iPhones, your cost would have been a new "USB cable" with each device....
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Click to collapse
Great with iPhone the cost is new cable included in the box of new dispositive and with android the cost is new 150€ of kenwood not included! From my iPod 3rd gen to iPhone 4s I have used the same cable and from ipod to iPhone 5s the same KENWOOD!

New to Google Player ...

Greetings!
Just got Google Player and psyched. Was wondering if someone can point me to good threads already on the forum that talks/educates about making this box more useful?
Thank you!

Just got one myself. Seems good although I thought there would be more apps available on the playstore. I've installed Kodi(playstore) and set it up after watching various vids on YouTube. Kodi is a must. You can watch or listen to practically anything. Enjoy.
Sent from my P6-U06 using XDA Free mobile app

Thank you. That was my next stop. I also have to peruse this forum too. Seems like rooting it may enable me to install more(?) apps from Google Play ... too much to learn!
wards5150 said:
Just got one myself. Seems good although I thought there would be more apps available on the playstore. I've installed Kodi(playstore) and set it up after watching various vids on YouTube. Kodi is a must. You can watch or listen to practically anything. Enjoy.
Sent from my P6-U06 using XDA Free mobile app
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ur2punk said:
Thank you. That was my next stop. I also have to peruse this forum too. Seems like rooting it may enable me to install more(?) apps from Google Play ... too much to learn!
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Click to collapse
There's apps that you won't see on the Play Store within the NP, but if you go on your computer browser you will see that they are compatible with the NP so you could install them through there. You could also side load apps.
FYI....you could buy an OTG cable along with a USB hub and attach additional storage or keyboard and mouse to it as well.

I bought the Startech Micro USB to USB OTG Host Adapter on amazon for $5 and it works perfect.

ur2punk said:
Thank you. That was my next stop. I also have to peruse this forum too. Seems like rooting it may enable me to install more(?) apps from Google Play ... too much to learn!
Click to expand...
Click to collapse
You can sideload apps without rooting it. Just look up how to sideload (super easy) and just download the .apk files. Your mind will be blown by what this small device can do.

Any apks you can recommend. Any with nexus player support. I bought a USB mouse but can get frustrating at times.

wards5150 said:
Any apks you can recommend. Any with nexus player support. I bought a USB mouse but can get frustrating at times.
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Depends what you want to do. I know there's a list of apps and what not in the general thread I believe. Basically just about every app gets moved over at some point.