视频的多个时间帧有潜在的重叠，因此在呈现前的步骤中需要特别注意。

Drawing frames of video at various positions in time that are potentially overlapping requires special consideration in the pre-rendering steps.

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循环的下一部分控制像素坐标的设置，条件是当前时间帧在起始帧之后。

The next loop section controls setting pixels coordinates only if the frame at that position is greater than the start frame.

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所有这些事件都发生在近乎相同的时间帧上，这从TIMESTAMP字段很接近的值可以看出。

All of these events happened around the same timeframe, as is demonstrated by the close proximity of values in the TIMESTAMP field.

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