[Android] Audio duration = -1 when play a mp3 audio on website

Quang Phu

Hi,

I am facing an issue with mp3 duration, it doesn't work well on android. This is my sample code:

import QtQuick 2.14
import QtQuick.Window 2.14
import QtMultimedia 5.14

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    Rectangle {
        anchors.fill: parent
        color: "lightblue"
        Text {
            text: "Click Me!";
            font.pointSize: 24;
            width: 150; height: 50;

            Audio {
                id: playMusic
                source: "https://phubq.com/upload/EA/toeic_practice/part1/toeic_practice_p1_s10_0.mp3"
                onPlaybackStateChanged: {
                    console.log("Current status: " + playMusic.playbackState)
                    console.log("Duration: " + playMusic.duration)
                }
            }
            MouseArea {
                id: playArea
                anchors.fill: parent
                onPressed:  { playMusic.play() }
            }
        }
    }
}

This is output by os:
Desktop:

qml: Current status: 1
qml: Duration: 0
qml: Current status: 0
qml: Duration: 17604

Android:

D libMP3Example_x86.so: qml: Current status: 1
D libMP3Example_x86.so: qml: Duration: -1
D libMP3Example_x86.so: qml: Current status: 0
D libMP3Example_x86.so: qml: Duration: -1

I don't know why on Android, that duration is -1. In my project, I need correct value to use for Slider.
Btw, I tested on iOS, and it worked well, then it seems this happens only in android system.
It also works well if I use mp3 file as resource instead play online mp3.
This is my system info:

Qt5.14.1
Android studio: 3.5.2
NDK: r20b

Any one have solution for this or met this before?