此结构包含 Playable 在 Playable.PrepareFrame 中接收的帧信息。
| deltaTime | 此帧与前一帧之间的时间间隔。时间间隔未缩放，以秒为单位。 |
| effectiveParentSpeed | 在 PlayableGraph 遍历期间，父 Playable 的累积速度。 |
| effectivePlayState | 此 Playable 的累积播放状态。 |
| effectiveSpeed | 在 PlayableGraph 遍历期间，Playable 的累积速度。 |
| effectiveWeight | 在 PlayableGraph 遍历期间，Playable 的累积权重。 |
| evaluationType | 指示导致 PlayableGraph.PrepareFrame 被调用的评估类型。 |
| frameId | 当前帧标识符。 |
| output | 启动此图遍历的 PlayableOutput。 |
| seekOccurred | 指示显式设置了本地时间。 |
| timeHeld | 指示本地时间未推进，因为它已达到持续时间，并且外推模式设置为“保持”。 |
| timeLooped | 指示本地时间已环绕，因为它已达到持续时间，并且外推模式设置为“循环”。 |
| weight | 当前 Playable 的权重。 |
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