No audio devices available on Android !!

muaddib · wrote on 23 Oct 2013, 18:07

I have tried the 5.2 beta released today, but I still get no devices. Should it have been supported in the beta or do we have to wait for the final release?

Andreas

Gianluca · wrote on 23 Oct 2013, 21:19

:-( that's a really bad news !!
I cannot understand why there is still this problem.
In the page of the 5.2 features it is clearly stated that the low-latency audio was added.
http://qt-project.org/wiki/New-Features-in-Qt-5.2
At that page, near the bottom, there is the section with Android and iOS where it is been declared that the audio was supported.

So, again, my question is: "What they mean for supporting low-latency audio if there is no possibility to use because we still get no devices ??"
Please, can someone involved into the Qt development answer to this question, and how they tested audio features on android and iOS without any devices available ??

Pierrot · wrote on 24 Oct 2013, 13:23

Hello,
same problem for me (Windows 7 + Qt5.2 Beta + Android deployment on several different devices). Question for muaddib and Gianluca: what environment do you use (Linux/Windows/Mac) ? Could this bug be related to QTBUG-34275 ?
Maybe the problem does not occur on Linux/Mac ?
A simple way to show the problem is to compile the 'examples/multimedia/audiooutput' project. It works fine when compiled on desktop (audio devices appear in the QComboBox), but not on Android device.

Gianluca · wrote on 24 Oct 2013, 16:49

On Linux and Mac I cannot even build and run the audiooutput example :-(

On Mac, it seems that iOS lacks completly the multimedia module :-(
On Linux, it comply that it did not find Qt5Quick.so library ... but the audiooutput it is not a Quick application :-(

Gianluca · wrote on 24 Oct 2013, 17:06

Some news !
After struggling a bit for compile the audioinput and audiooutput on linux for android ... I successful run the two example and they found various input/output devices.

So, it seems that Audio Input and Output works on Android if the app has been built from a linux machine.

muaddib · wrote on 24 Oct 2013, 17:51

I am on windows 7 as well and deploying on a Nexus 4. The bug looks relevant, but I couldn't find any references to opensles in any of the logs when building or deploying.

leo chen · wrote on 25 Oct 2013, 08:22

hello,I come across the same issue ,how to deal with? i am on win32.

[quote author="Gianluca" date="1382634372"]Some news !
After struggling a bit for compile the audioinput and audiooutput on linux for android ... I successful run the two example and they found various input/output devices.

So, it seems that Audio Input and Output works on Android if the app has been built from a linux machine.
[/quote]

Pierrot · wrote on 25 Oct 2013, 08:26

well played Gianluca, on my side unfortunately I don't have Linux or Mac environment to test Android deployment.
muaddib, me neither I don't see any reference to opensl, but when I build I have this warning 'Warning: Dependency not found: C:/Qt/Qt5.2.0/5.2.0-beta1/android_armv7/plugins/audio', and in the bug I mentioned, the description talks about a problem in 'plugins/audio' for Windows, I don't know if this is linked.
I also tried yesterday's last snapshot (2013-10-24_112) and the problem is still there.

Gianluca · wrote on 25 Oct 2013, 08:30

Because it works on my linux machine, I think that you are blocked by the bug mentioned above: https://bugreports.qt-project.org/browse/QTBUG-34275
So, you don't have any alternative but wait for Qt 5.2.0 RC1

Pierrot · wrote on 4 Nov 2013, 13:36

Hi all,
just to inform you that the problem was resolved on Windows by downloading the latest Qt5.2 Beta snapshot (2013-11-01_126/). The audio device is now recognized and I can play audio files.

messi · wrote on 19 Nov 2013, 21:26

Hi all
strange is that my audio is working with the precompiled Qt5.2 Beta1 for android.
I habe a Huawei Tablet with android 4.1.2
Video is partly working but with stutter/judder.
I'm building now fresh from git and will tell you tomorrow my results.