Compressing binary data results in a very low compression ratio.

二进制文件（png、mp4）都在几百k，甚至几M，使用miniblock的话，基本上一个值就是一个块，使用full-zip的话，单值压缩，而且我们的场景是二进制数组，数组内元素也不怎么重复，导致压缩比比较低

Binary files (PNG, MP4) are typically several hundred kilobytes or even several megabytes in size. Using miniblock compression, essentially each value becomes a separate block. With full-zip compression, each value is compressed individually, and since our scenario involves binary arrays with few repeating elements, the compression ratio is quite low.

这个是字段的schema定义 This is the schema definition for the field. 这个是压缩比 辛苦看看是不是哪里用的不对呢，或者少什么配置参数 This is the compression ratio. Please check carefully to see if anything is being used incorrectly or if any configuration parameters are missing.

No source files, tests, or entry points are named. Start by reproducing the reported compression behavior for PNG and MP4 binary arrays with the shown schema, comparing miniblock and full-zip settings; determine whether the ratio is expected or whether a configuration or implementation issue is involved.