did anyone already solve this problem??

im now experiencing this problem 

i already try to force restart and repair it using pc companion but nothing happened

i hope someone could help me :(

thanks in advance

Hi info_1, I will follow up on the other Thread you created.

https://developer.vuforia.com//forum/issues-and-bugs/video-playback-issues-sony-xperia

I have raised a new issue (here) that seems to show this bug hasn't gone away even with a later Xperia 4.0.4 build and Vuforia 2.0.31.

Thanks a lot for the update masonshiung!

Very appreciated (and glad to hear that 2.0.30 seems to solve the issue).

Hi,

ImageTarget sample with SDK 2.0.30 runs on Sony Xperia S(build 45) perfectly with/without internet connection.

After we rebuild our custom app with SDK 2.0.30, our custom app seems also working well on Sony Xperia S(build 45).

It looks like SDK 2.0.30 has fixed this issue, I will test more to make sure this issue is truly gone..

Thanks!

regards,

Mason Hsiung

You can check your email.

Hi AlessandroB, could I have your email :) ?

My email is

mason_hsiung@speedpass.net.tw.

Thanks!

Forgot to mention: could also you tell us what is the name of your App ?

Hi,  really appreciating your kind cooperation;

ideally it would be great if you could run the same test using the ImageTargets sample (and yes, 2.0.30 if possible)

that would be really helpful (be sure to unisntall any previous ImageTargets from your device before running the tests).

If the Image target sample does not show the black screen issue, then we could really narrow the problem.

If you can do that, that would be great!

Hi,

We are using Vuforia SDK 2.0.29, which is not latest one(just found 2.0.30 is avaiable to download.)

The app we had tested with is our custom application.

The app uses QCAR in this way

1. Run the app.

2. User tap on download button to download the necessary data from our backend.(which requires internet connection.)

3. Initialize QCAR, then get into the camera screen.(we turned off the internet connection before the initialization in the test.)

so.. do I need to update QCAR to 2.0.30?  can the latest version fix the issue?

I can run the test with the latest SDK, if you want.

Thanks :)

Hi masonhsiung,

one more question for you, which can be of great help for us: 

which Vuforia SDK version are you using in your App that you used for this test?

also, is it just a sample app like Image Targets, or is it your custom application ?

Thanks

Thanks for the report, that information is very helpful. It appears that Sony is currently pushing .50 to the UK - http://talk.sonymobile.com/thread/52984?start=40&tstart=0

Hi,

We just got the test result.

The QCAR screen appears normally when there is no internet connection(clear cache, uninstall, install), after that, if we turn on the internet connection, the black screen shows up.

I think the behavior is the same...., FYI.

Thanks!

It seems someone has already got .50 build, but you can do the test (clear/uninstall/reinstall/switch off net and start App) as described also using build .45.

If you can then share the result that would be great.

OK, I will try to do the test you mentioned, will update you later.

BTW, is the build 6.1.A.2.50 officially released?

Because I can't find the build from Sony's website.(only found 6.1.A.2.45 in Taiwan)

Any idea?

Thanks!

Hi masonhsiung,

could you try upgrading your Android 4.0.4 to the latest build: 6.1.A.2.50 ?

also, could you make this quick test:

- clear cache + uninstall the App / reinstall App

- disable network connections

- run App

And see if it makes any difference ?

Hi,

We have tested our app on Xperia S with Vuforia SDK 2.0.

But we still got black screen, has it be fixed in 2.0?

Any idea?

For your information, our Xperia S version is below.

Android: 4.0.4

Build number : 6.1.A.2.45

Thanks.

Hi Again i have try to use the app this morning, i have clear the cache and i have connected it to internet. And now the app works well thx for everything.

More Information:

Android 4.0.4

Build :6.1.A.2.50

Has anyone tried the latest 4.0.4 build? We have a report that 4.0.4, build 6.1.A.2.45 is not longer presenting this issue.

Hi Intar,

thanks for sharing your findings, this is really appreciated. Your tests provide valuable information.

May I ask you to do a very simple extra test on your device ? Could you try (in ImageTargets sample or any Vuforia app you prefer) to use MODE_OPTIMIZE_QUALITY in the CameraDevice initialization (when you select the video mode ) ?

And let me know if that works ?

HI David:

I’m going to describe what I am doing with your demo app ImageTarget (https://developer.vuforia.com/resources/sample-apps/image-targets-sample-app).

First of all I downloaded the .apk to my PC, copied to my Xperia and installed it.

Now I turn off all internet access on my mobile (turn off Wi-Fi and 3G connection), and I start the app, everything goes ok, I see the splash screen, the about screen and I can click on the start app button, after 1 second my cam turns on and I can use it with the demo markers, and see the teapot. The app hasn’t written anything on my mobile.

So I can assume that the app works well.

Second execution, now I have turned on all internet access on my mobile (Wi-Fi and 3G connection its up), and I start the app, now I can see the splash screen and the about screen but whenever I click on the button I am only able see the loading screen and after that a black screen and the cam never start work, the only thing I can do is closing the app. When I close the app and I go check if the app has write something on my mobile I notice that it has written 20 KB of info into my device.

Third execution, it doesn’t matter if I have internet access or not. In case I have the 20KB of info written within the app, I always get the black screen after I click the start button in the about screen.

However in case I open the app manager and I clean the app cache and the app stored data and I turn off internet access as I describe on point 1, I can see everything  again working fine.

Due to these facts I decided to download the Unity Project to try to know where the app stops working and I have found this:

On your CameraDeciceImpl.cs file I found this method:

public override bool Init(CameraDirection cameraDirection)
    {    
        // play mode emulates back facing camera mode only for now
        if (QCARRuntimeUtilities.IsPlayMode())
            cameraDirection = CameraDirection.CAMERA_BACK;        
        if (InitCameraDevice((int)cameraDirection) == 0)
        {        
            return false;        
        }        
        mCameraReady = true;

        // in play mode, CameraReady does not only evaluate the above flag, but also the web cam state
        if (this.CameraReady)
        {            
            QCARBehaviour qcarBehaviour = (QCARBehaviour)Object.FindObjectOfType(typeof(QCARBehaviour));
            if (qcarBehaviour)
            {
                // resets the number of frames for which the color buffer needs to be cleared
                // to avoid rendering artifacts while the camera is being initialized
                qcarBehaviour.ResetClearBuffers();

                // configure the videobackground, set initial reflection setting
                qcarBehaviour.ConfigureVideoBackground(true);
            }
        }

        return true;
    }

And I have notice this:

If the app didn’t download  anything  on my mobile the InitCameraDevice((int)cameraDirection) call returns 1 and the execution continues and the method returns true, but when the app has written something on my mobile this call returns 0, the method returns false and the app doesn’t work.

Hope this report helps to fix the problem so the app can run on all devices.

Were you able to run a 2.0 app when there was no internet connection?

Congrats for the new SDK but the black Screen keeps there when the phone its connected to Internet.

Thx for all.

Also just for the record - quite few 0 ratings due to the properly erroneous camera implementation from Sony(Ericsson).

I hope you guys are able to find a workaround soon - any update on your progress would be greatly appreciated and if you need support in debugging just let us know.  (However repeatability is 100% so that part is not very tricky)

Cheers

Also just for the record - quite few 0 ratings due to the proparly erroneous Sony(Ericsson) camera implementation.

I hope you guys are able to find a workaround soon - any update would be greatly appriciated and if you need support in debuging just let us know.  (However repeatability is 100% so that is not very tricky)

Cheers

Also just for the record - quite few 0 ratings due to the proparly erroneous Sony(Ericsson) camera implementation.

I hope you guys are able to find a workaround soon - any update would be greatly appriciated and if you need support in debuging just let us know.  (However repeatability is 100% so that is not very tricky)

Cheers

Thanks for the report. We're actively pursuing this issue. 

FWIW this is a problem with the XPeria S that affects a range of apps that utilize the camera. It's not exclusive to Vuforia. 

Hi,

Just for the record, we also got the feedback from our user, that Sony Xperia S (Android 4.0.4) also gets black screen.

Our app is using Vuforia SDK.

Thanks.

Thanks for the details. We are currently investigating the Xperia S issue.

Thanks for your reply.

Android version: 4.0.4

Kernel version: 3.0.8+1.0.21100-30145-01956-g43358ca

BuildUser@BuildHost )#1

SMP PREEMPT Mon Jul 30 13:29:45 2012

Build number: 6.1.A.2.45

Thanks for the report - which Android OS version is this device running?