console.log (sourceBuffer.buffered.length) //3
sourceBuffer.remove(0);
//TypeError: Failed to execute 'remove' on 'SourceBuffer': required,
// 2 arguments but only 1 present.
是否sourceBuffer.remove()
删除缓冲范围或整个源缓冲区?
如果是这样,两个预期的论点是什么?