The compression file is mainly to make the files smaller and easy to store. If the size is unchanged, there is no special meaning. The previous editor told you how to compress the file to the smallest? Some netizens reflect that they are compressed by compression. During the file, it is found that the size and source file after the file is compressed is not changed. What is going on? In fact, the reason for this is clear as long as the 360 ​​compression principle is clear.

360 compression principle

The basic principle of compressed files is to find duplicate bytes in the file, and create a "dictionary" file of the same byte, and use a code to indicate that there are several words in the file "The People's Republic of China" in the file "uses one in the People's Republic of China". The code represents and writes the "dictionary" file so that the purpose of narrowing the file can be achieved. Compress the dual -made code of the file to reduce the adjacent 0,1 code. For example, if there is 000000, it can turn it into 60 writing 60 to reduce the space of the file.

360 compression compression file size has not changed:

This means that your files have no repeated bytes. Why is it gone? It is likely that your file has been compressed files, such as some JPG formats, mp3 formats, and video formats. Those who have been compressed, no duplicate parts can be merged again.

Which format files will reduce the size:

Some picture files, music files, video files, and files that have been compressed are not changed much when compressed. JPG, PNG, MP3, MP4, RMVB, AVI, WMA, RM, Flash, MID, 3GP, RAR, ZIP, TAR, CAB, Uue, JAR, ISO, 7-ZIP, ACE, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, ARJ, Arj, gzip, BZ2

How to compress to compress to smaller:

Use other format compression, such as 7Z, or use sub -roll compression. For details, please see: How to set the compression file size of 360 compression is the smallest

Summary: The above is the content of the "360 compression compression file size that has not changed_The cause analysis of the reasons for the size of the compression file". Reminder: The very compressed RAR format file, if WinRAR is used to compress, there may be increased volume

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