How to play mp3 file

_Mark_

In order to play mp3 files with QAudioOutput what should I install?
Currently only wav files are played.

I'm talking about a linux embedded environment. I cannot find in the doc which libraries it needs. I tried to install gstreamer 0.1 but it doesn't work.

JKSH

Hi,

With Qt 4, you need to use a 3rd party library to decode your MP3 files into raw PCM format. Once you have your audio in PCM format, you can pass it into QAudioOutput. Try http://www.mpg123.de/

Or, if you use Qt 5, QMediaPlayer can play MP3 files directly on Linux. All you need to do is install codecs on your system.

_Mark_

Hello,
I'm using Qt5.2 and I've already have installed mpg123.

Whenever I try to play anything with QMediaPlayer I got the following warning and no audio:

@
defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"
@

Perhaps I miss something but I can't figure out...

JKSH

What distro are you using? How did you install Qt 5?

_Mark_

I compiled a custom buildroot image.
Where might I find what QtMediaPlayer requires in order to work?

JKSH

Did you build Qt 5 yourself too?

QMediaPlayer uses GStreamer 0.1 as the audio backend on Linux. You need to install GStreamer dev libraries, with the relevant GStreamer plugins for decoding MP3 data.

_Mark_

Buildroot compiled Qt5 for me ;-)
I included gstremer libraries but I'm afraid not the -dev ones. I will double check for this.

_Mark_

I can't find the correct package in buildroot to enable the support for QMediaPlayer!

JKSH

Where did you get your custom buildroot from?

_Mark_

git clone git://git.buildroot.net/buildroot

and then I configured it using make nconfig.
Do you know what package(s) I need to add?

JKSH

Looks like a neat project. I've never seen it or used it before unfortunately, so I don't have an exact solution.

But in general. you need GStreamer 0.1, plus a GStreamer MP3 decoding plugin. You need to make sure GStreamer (the dev libraries) is installed BEFORE you compile Qt.

If you need more help, perhaps the Buildroot developers/community know more details.

_Mark_

I've already written to the buildroot mailing list - still no answers on this topic. Thank you anyway,