Check if a audio format of a given file is supported in Qt6

Question

There have been many changes in QtMultimedia between Qt5 and Qt6. With QMediaFormat::supportedAudioCodecs, we get a list of QMediaFormat::AudioCodec supported by the system.

Now we should get the QMediaFormat::AudioCodec that is used by a given file.

For that, it seems possible to use QMediaPlayer::metaData but unfortunately, on all the files I tested, the metadata does not contain QMediaFormat::AudioCodec or I don't know how to retrieve this value. In Qt5, it looks QMediaContent was suitable to get media information but it has been removed in Qt6.

Pamputt · Accepted Answer · 2023-05-29T09:03:30.650

There was an issue in Qt that has been fixed in Qt 6.5.0 and the use of FFmpeg.

Here is how I have implemented a verification function:

bool isCodecSupported(QMediaFormat::AudioCodec fileCodec) const
{
    // get supported audio codecs list
    QMediaFormat mediaFormat;
    const QList<QMediaFormat::AudioCodec> supportedAudioCodecs =  mediaFormat.supportedAudioCodecs(QMediaFormat::Decode);

    // check if file codec is supported by the system
    return std::any_of(supportedAudioCodecs.constBegin(), supportedAudioCodecs.constEnd(), [&](QMediaFormat::AudioCodec systemCodec) {
        return fileCodec == systemCodec; });
}

QMediaPlayer mediaPlayer = QMediaPlayer();
mediaPlayer.setSource(QUrl("qrc:/audio.wav"));
QMediaFormat::AudioCodec fileAudioCodec = mediaPlayer.metaData().value(QMediaMetaData::AudioCodec).value<QMediaFormat::AudioCodec>();
if(!isCodecSupported(fileAudioCodec))
    qWarning() << tr("%1 (%2) is not supported by your system. Please install this codec to be able to play a sound.")
                      .arg(QMediaFormat::audioCodecName(fileAudioCodec))
                      .arg(QMediaFormat::audioCodecDescription(fileAudioCodec));

Check if a audio format of a given file is supported in Qt6

1 Answers1