Why am I missing the Qt Multimedia functionality?

Question

I am new to Qt and I'm creating a simple application which will playback an audio file. I realized that I am lacking the Qt Multimedia API for audio when I wrote:

#include <QAudioOutput>

..and I get that there is no such file.

I downloaded the latest Qt SDK framework and I can't find a way to add these APIs. I am using Qt creator IDE.

IS there a way to get the multimedia functionality working maybe as an add-on or some other way?

Thanks.

Please give more details: what is the exact version of the SDK, what platform you are on, what platform you are building for, and what did you put in your project file? Or did you just create a project with Qt Creator and didn't edit the project file at all? — Ilkka, Mar 23 '11 at 19:09
SDK 1.1, Qt Creator 2.1 on Windows 7. Since it wasn't working for me I then tried to simply run the audio output example from http://doc.qt.nokia.com/4.7/multimedia-audiooutput.html. But the problem persists because of the missing QAudioOutput class and any Qt multimedia files — satg, Mar 23 '11 at 21:55
I just downloaded Qt SDK 1.1 beta for Windows XP and used "explore Qt c++ examples" > Multimedia > Audio Devices to create a test project that built and ran fine. Also adding `QT += multimedia` and including `QAudioOutput` in another project worked. Do you have the multimedia headers in e.g. `C:\QtSDK\Desktop\Qt\4.7.2\mingw\include\QtMultimedia`? — Ilkka, Mar 24 '11 at 10:45
I currently have the same problem with (from the Debian repository) Qt Creator 2.5.0 based on Qt 4.8.2 [result of 'qtcreator -version'] — user1016736, Dec 28 '13 at 00:08

score 8 · Answer 1 · edited Oct 26 '12 at 06:41

8

Try including it like this:

#include <QtMultimedia/QAudioOutput>

edited Oct 26 '12 at 06:41

SingerOfTheFall

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answered Jan 30 '12 at 18:58

ros

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score 7 · Answer 2 · edited May 07 '19 at 18:02

7

Without more info it's hard to say, but possibly your include paths are just incomplete. Read https://doc.qt.io/archives/qt-4.7/qtmultimedia.html and be sure to add

QT += multimedia

to your project file.

edited May 07 '19 at 18:02

Vaidotas Strazdas

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answered Mar 23 '11 at 19:17

Ilkka

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The audiooutput example includes the 'audiooutput.pro file which has the following: "QT += multimedia widgets" – user1016736 Dec 28 '13 at 00:10

score 2 · Answer 3 · answered Mar 19 '14 at 08:59

2

try sudo apt-get install qtmultimedia5-dev

answered Mar 19 '14 at 08:59

user3436744

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score 0 · Answer 4 · answered Jun 30 '15 at 10:31

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in your pro. file try: QT += widgets multimedia

answered Jun 30 '15 at 10:31

Josh Marshall

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Why am I missing the Qt Multimedia functionality?

4 Answers4

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