我正在尝试检查多个视频是否有音频,例如:
https://jsfiddle.net/hrd4a0c3/
但这只会检查一个视频,我希望它能检查多个视频。
document.getElementById("myVideo").addEventListener("loadeddata", function() {
if (typeof this.webkitAudioDecodedByteCount || this.mozHasAudio || this.audioTracks !== "undefined") {
if (this.webkitAudioDecodedByteCount > 0 || this.mozHasAudio || this.audioTracks && this.audioTracks.length)
this.after("has audio");
else
this.after("no audio");
}
});
最佳答案
我将使用class
而不是id
,因为id应该引用一个元素。
<video class='myVideo' autoplay loop muted>
<source src="https://vtt.tumblr.com/tumblr_ok41s7Iebh1t4fjz0_480.mp4" type="video/mp4">
</video>
<video class='myVideo' autoplay loop muted>
<source src="https://vtt.tumblr.com/tumblr_ok44bpZZka1t4fjz0_480.mp4" type="video/mp4">
</video>
然后,您可以像这样使用
getElementsByClassName
:var videos = document.getElementsByClassName("myVideo");
for (i = 0; i < videos.length; i++) {
videos[i].addEventListener("loadeddata", function() {
if (typeof this.webkitAudioDecodedByteCount || this.mozHasAudio || this.audioTracks !== "undefined") {
if (this.webkitAudioDecodedByteCount > 0 || this.mozHasAudio || this.audioTracks && this.audioTracks.length)
this.after("has audio");
else
this.after("no audio");
}
});
}
更新了Fiddle
关于javascript - 如何检查多个HTML5视频的音频,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45433222/