Qt6.11.1: Qt Multimedia not working on iOS device

[Quang Phu]

Hello
I have just built my project with Qt6.11.1
Build successfully but when I deploy app on iPhone 15, audio is no sound, no error show.
With same code I build with Qt 6.7.3 then deploy and audio work well.
Anyone met this issue before and how to fix it?
Below is same code for audio play

MediaPlayer {
        autoPlay: true
        loops: MediaPlayer.Infinite
        source: Audios.backgroundMusic
        audioOutput: AudioOutput {
            volume: moduleController.infoController.musicVolume / 100
        }
    }

[SGaist]

Hi,

Are you getting error messages ?
One thing you can is start your application with the QT_DEBUG_PLUGINS environment variable set to 1. This should give information on the plugins loaded and check whether the multimedia backend fails somehow.

Are you already following the iOS platform specifics ?

[Quang Phu]

@SGaist hi

"Are you already following the iOS platform specifics ?" Yes, I put setting

CONFIG += add_ios_ffmpeg_libraries

Because if without setting above, compile will got error about ffmpeg

"QT_DEBUG_PLUGINS environment variable set to 1", I tried put it, but there is no error relate to Multimedia
This is all logs about the code I post above

qt.multimedia.ffmpeg: Using Qt multimedia with FFmpeg version 7.1.3 LGPL version 2.1 or later
[mp3 @ 0x11291c280] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from '/private/var/mobile/Containers/Data/Application/058418D5-21C8-4A99-8753-8CDDDE49245C/tmp/english.ZZbUOf.mp3':
  Metadata:
    TBPM            : 127
    encoded_by      : LAME in FL Studio 11
    date            : 2018
  Duration: 00:03:39.89, start: 0.000000, bitrate: 32 kb/s
  Stream #0:0: Audio: mp3 (mp3float), 16000 Hz, stereo, fltp, 32 kb/s

This issue I met from Qt v6.8.x (now v6.11.1 still exists), then each time I want to build production for iOS I must use v6.7.3.

[SGaist]

Then try with the full logging enabled.
There will be a flood but you might find something in there.