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在非线性编辑系统中，视频的实时存取策略需满足两点要求：一是尽可能充分利用硬盘的存储速率．在存取视频时，尽量减少移动硬盘磁头的时间．二是尽可能充分利用硬盘中的碎片．常用的随机存储与连续存储策略均不能满足上述的要求．本文提出了分块存储策略．实验证明，该策略在提高存取速率的同时，能有效地减少硬盘中的碎片．
In a non-linear editing system, the real-time video access policy needs to meet two requirements: First, make full use of the hard disk storage rate. When accessing video, minimize the time required to move the head of the hard drive. The second is to make full use of the hard disk fragments. Commonly used random storage and continuous storage strategy can not meet the above requirements. This paper proposes a block storage strategy. Experiments show that this strategy can effectively reduce the hard disk fragmentation while improving the access rate.