MediaPlayer: Add Metadata Flag to Identify HDR or DolbyVision Videos

Playing HDR videos using QML multimedia player shows video in very dim light though the actual video is bright. Attached the screenshots showing difference of lighting in video playback between Qt Media Player and default IOS player. And also attached the HDR video file.

If fixing this bug takes more time, then in the meantime please provide us a flag in the metaData property of MediaPlayer QML Type to indicate that the current media being played is HDR or DolbyVision video. Using this flag we can keep our app users informed about low lighting for HDR videos.

Window {
    width: 640
    height: 480
    visible: true
    MediaPlayer {
       id: player
       audioOutput: AudioOutput{}
       videoOutput: videoOutput
       source: "sample.MOV"
    }
    VideoOutput{
       id:videoOutput
       anchors.fill:parent
    }
    MouseArea{
     anchors.fill: parent
     onPressed: player.play();
    }
}