Problem with Duration

[csacchetti]

I found a problem with the value that Duration Function provides. I noticed the error when I implemented the function in the BlockScreen notification window. The system slider (of iOS) did not move properly and terminated or before or after. I tried to compare the result that the Duration function provided and the actual length of the file and did not actually match.

I init the variable
double _audioDurationSeconds;

I load the file
_audio = Audio.load(
'assets/audios/${myVarList[indexVar][indexGo]}',
onComplete: () => setState(() => myComplete()),
onDuration: (double durationSeconds) =>
setState(() => _audioDurationSeconds = durationSeconds),
playInBackground: true,
);

I set metaData
AudioSystem.instance.setMetadata(AudioMetadata(
title: "${interfaceTexts.itInterfaceTexts["myText"]} ${resulVarList[0]}",
artist: myListTextMystery[indexVar][0] + " - " + myLabel,
durationSeconds: _audioDurationSeconds,
artBytes: imageBytes));

The result of _audioDurationSeconds don't match with the real duration of file (I see in the info windows) of the file. In each case a second less, in other a second more...