javascript - Get Video Duration jQuery -

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i have question. trying duration of source.

i want next: when page load need duration of source problem when want duration apparently not visible, can duration when press button. need know duration since start because need calculate position on video/audio , send through currenttime.

i try "alert" result "nan".

this code actually:

$( document ).ready(function() {     var asset = $('#asset')[0]; // obtiene el objeto     var tipo = $('#asset').attr('class'); // video, audio, pdf     var duracion = asset.duration;     var porcentaje = $('#porcentaje').attr('data-percent');      var tiempo = (porcentaje*duracion)/100;     asset.currenttime = tiempo;     alert(duracion); // nan      $("#guardar").click(function() {         var avance = asset.currenttime;         if(tipo == 'video' || tipo == 'audio'){             porcentaje = parseint((avance*100)/duracion);         }         else if(tipo == 'pdf'){             porcentaje = 100;         }         alert(porcentaje);     }); });

that's all. thank you.

gustavo g.

you'll have wait @ least until metadata loaded videos duration, luckily there's event that

$( document ).ready(function() {     var asset      = $('#asset')[0]; // obtiene el objeto     var tipo       = $('#asset').attr('class'); // video, audio, pdf     var duracion   = 0;      var tiempo     = 0;     var porcentaje = $('#porcentaje').data('percent');       asset.addeventlistener('loadedmetadata', function() {         duracion = asset.duration;         tiempo   = (porcentaje*duracion)/100;          asset.currenttime = tiempo;     });      $("#guardar").click(function() {         var avance = asset.currenttime;         if(tipo == 'video' || tipo == 'audio'){             porcentaje = parseint((avance*100)/duracion);         } else if(tipo == 'pdf') {             porcentaje = 100;         }     }); });

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