Multimedia FFMPEG backend emits an error when trying to play a music file with embedded cover image

When I set a `MediaPlayer`'s source to a music file with embedded cover image & start playing, the `error` is set to `FormatError` and the `errorString` is "Cannot create codec,Failed to open FFMPEG codec context Invalid argument". In the console I also get the output "[mjpeg_cuvid @ 0x114c040] Codec mjpeg_cuvid is not supported." However the audio continues to play just fine. The error disappears if I change the playback of the file (i.e. play/pause)

This error does not occur if I set the source to a music file with no embedded cover image.

If I run `ffmpeg -hwaccels` then cuvid does not appear in the list of hardware acceleration methods. If I run `ffmpeg -hwaccel cuvid -i track.mp3 cover.jpg` then the cover file is successfully extracted with the following output:
```
[mjpeg @ 0x55665d6f00c0] Hardware is lacking required capabilities
[mjpeg @ 0x55665d6f00c0] Failed setup for format cuda: hwaccel initialisation returned error.
```
so clearly ffmpeg is able to extract a cover file without needing cuvid. Which means maybe Qt is attempting to extract the cover image with cuvid and not allowing ffmpeg to use any fallback methods?

Hardware/software details:
Operating System: openSUSE Tumbleweed 20231115
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 6.6.0
Kernel Version: 6.6.1-1-default (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-5200U CPU @ 2.20GHz
Memory: 7.7 GiB of RAM
Graphics Processor: NVIDIA GeForce 840M/PCIe/SSE2
Manufacturer: Dell Inc.
Product Name: Inspiron 5749
System Version: A09

Reproducible example (load a track with embedded image, press play, look at the "Current error" label):

import QtQuick.Controls
import QtQuick.Dialogs
import QtMultimedia
ApplicationWindow {
    visible: true
    width: 600
    height: 600
    AudioOutput {
        id: audioOutput
    }
    MediaPlayer {
        id: mediaPlayer
        audioOutput: audioOutput
    }
    FileDialog {
        id: fileDialog
        fileMode: FileDialog.OpenFile
        currentFolder: StandardPaths.standardLocations(StandardPaths.MusicLocation)[0]
        onAccepted: mediaPlayer.source = selectedFile
    }
    Column {
        Button {
            text: "Select music file"
            onClicked: fileDialog.open()
        }
        Button {
            text: mediaPlayer.playing ? "Pause" : "Play"
            onClicked: mediaPlayer.playing ? mediaPlayer.pause() : mediaPlayer.play()
        }
        Label {
            text: "Current file: " + mediaPlayer.source.toString()
        }
        Label {
            text: "Current status: " + mediaPlayer.mediaStatus
        }
        Label {
            text: "Playback state: " + mediaPlayer.playbackState
        }
        Label {
            text: "Current error: " + mediaPlayer.error + " " + mediaPlayer.errorString
        }
    }
}