问题描述
使用HTML5，我试图获取位于mp4标头中的属性(即旋转)(我使用视频标签进行播放)，为此，我尝试获取组成标头的字节，并知道结构，找到这个原子.
Using HTML5 I am trying to get the attribute (ie rotation), located in the header of a mp4 (I play it using a video tag), to do this I am trying to get the bytes that make up the header, and knowing the structure, find this atom.
有人知道如何使用javascript吗?
Does anyone know how to do this in javascript?
推荐答案
我认为您无法使用HTML5及其视频标签从视频中提取此类详细的元数据.您可以提取的唯一信息(视频长度，视频轨道等)在此处列出:
I do not think you can extract such detailed metadata from a video, using HTML5 and its video-tag. The only things you can extract (video length, video tracks, etc.) are listed here:
http://www.w3schools.com/tags/ref_av_dom.asp
当然，某些浏览器中可能还有一些特殊的附加方法，但是没有通用"方法-您将需要比HTML5的现有方法更多的东西.
Of course, there might be special additional methods available in some browsers, but there is no "general" approach - you would need more than the existing methods of HTML5.
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