[SOLVED] defaultServiceProvider::requestService(): no service found for

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

I'm building my Qt app into an AppImage on Ubuntu-22.04. It builds without errors and the app works. But the problem is that it's supposed to display a video, and it doesn't. The initial version of the app successfully displays the video, but the new version does not. However, the video works correctly when I run the app from Qt Creator in Debug mode. The error message is:"defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"".

I know there are multiple topics about this error across the forums, but i tried everything. I installed all the libs that were recommended:

sudo apt-get update
sudo apt-get -y install \
            libclang-dev \
            libdbus-1-dev \
            libfontconfig1-dev \
            libfreetype6-dev \
            libgl1-mesa-dev \
            libharfbuzz-dev \
            libx11-dev \
            libx11-xcb-dev \
            libxcb-glx0-dev \
            libxcb-icccm4-dev \
            libxcb-image0-dev \
            libxcb-keysyms1-dev \
            libxcb-randr0-dev \
            libxcb-render-util0-dev \
            libxcb-shape0-dev \
            libxcb-shm0-dev \
            libxcb-sync0-dev \
            libxcb-xfixes0-dev \
            libxcb-xinerama0-dev \
            libxcb1-dev \
            libxext-dev \
            libxfixes-dev \
            libxi-dev \
            libxkbcommon-dev \
            libxkbcommon-x11-dev \
            libxrender-dev \
            libpulse-dev \
            libunwind-dev \
            libgstreamer1.0-dev \
            libgstreamer-plugins-base1.0-dev \
            libgstreamer-plugins-bad1.0-dev \
            gstreamer1.0-plugins-base \
            gstreamer1.0-plugins-good \
            gstreamer1.0-plugins-bad \
            gstreamer1.0-plugins-ugly \
            gstreamer1.0-gl \
            gstreamer1.0-libav \
            gstreamer1.0-qt5 \
            gstreamer1.0-tools \
            libqt5multimedia5-plugins \
            libqt5core5a \
            libfuse2 \
            ffmpeg \
            ffmpegthumbnailer \
            autoconf \
            automake \
            build-essential \
            cmake \
            git-core \
            libass-dev \
            libgnutls28-dev \
            libmp3lame-dev \
            libsdl2-dev \
            libtool \
            libva-dev \
            libvdpau-dev \
            libvorbis-dev \
            meson \
            ninja-build \
            pkg-config \
            texinfo \
            yasm \
            zlib1g-dev \
            ffmpegthumbs \
            ffmpeg-doc \
            qtbase5-dev \
            qtdeclarative5-dev \
            libavcodec-dev \
            qml-module-qtmultimedia \
            qml-module-qt-labs-settings \
            qml-module-qtquick-controls2 \
            qml-module-qtquick-layouts \
            qml-module-qtquick-window2 \
            qml-module-qtquick-dialogs \
            qml-module-qtquick-controls \
            binutils \
            fuse \
            libglib2.0-0

I even installed Qt with qtmultimedia with aqt:

aqt install-qt --outputdir ./Qt linux desktop 5.15.2 --archives qtmultimedia

If someone could provide me with instructions for resolving this issue, I would greatly appreciate it.

Solution

UPDATE: I just had to add the Qt mediaservice folder with its plugins into my build's plugins directory and it worked.