在与媒体容器结合使用时的时间表示。
可将 MediaTime 视为 "rate
Hz 时的样本 #count
"。
即使对于较大的值,此表示也很精确,因为样本数量和速率是分开存储的,并且不使用浮点存储。
Invalid | 无效时间值。 |
MediaTime | 使用 1Hz 作为速率创建一个具有整数秒的时间值。 |
double | 返回表示为浮点秒数的时间值。 |
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