在ZIP存档中Brotli压缩的id号是多少？
在ZIP存档中Brotli压缩的id号是多少？
提问于 2016-06-20 18:55:21
ZIP文件格式支持许多压缩算法，并为它们分配编号，例如0是存储，8是压缩，14是lzma。哪个数字表示Brotli压缩？这种压缩算法是否需要额外的压缩级元数据？
回答 1
Stack Overflow用户
回答已采纳
发布于 2016-08-19 05:03:10
在写这篇文章的时候，没有一篇。ZIP文件格式压缩方法的官方列表在PKWare的ZIP附录中找到，最新版本为6.3.4，日期为2014年10月1日。以下是其中定义的压缩方法：
4.4.5 compression method: (2 bytes)
0 - The file is stored (no compression)
1 - The file is Shrunk
2 - The file is Reduced with compression factor 1
3 - The file is Reduced with compression factor 2
4 - The file is Reduced with compression factor 3
5 - The file is Reduced with compression factor 4
6 - The file is Imploded
7 - Reserved for Tokenizing compression algorithm
8 - The file is Deflated
9 - Enhanced Deflating using Deflate64(tm)
10 - PKWARE Data Compression Library Imploding (old IBM TERSE)
11 - Reserved by PKWARE
12 - File is compressed using BZIP2 algorithm
13 - Reserved by PKWARE
14 - LZMA (EFS)
15 - Reserved by PKWARE
16 - Reserved by PKWARE
17 - Reserved by PKWARE
18 - File is compressed using IBM TERSE (new)
19 - IBM LZ77 z Architecture (PFS)
97 - WavPack compressed data
98 - PPMd version I, Rev 1我想您可以定义自己的方法号并使用它，但是这种使用是不标准的。(这是一个两个字节的字段，所以您可以选择一个PKWare不太可能定义为其他内容的大数字。)
不，没有其他信息需要能够解压一个brotli流。
更新：
截至2020年7月附录(6.3.9)，更多的压缩方法，特别是zstd和xz，但仍然没有brotli。
4.4.5 compression method: (2 bytes)
0 - The file is stored (no compression)
1 - The file is Shrunk
2 - The file is Reduced with compression factor 1
3 - The file is Reduced with compression factor 2
4 - The file is Reduced with compression factor 3
5 - The file is Reduced with compression factor 4
6 - The file is Imploded
7 - Reserved for Tokenizing compression algorithm
8 - The file is Deflated
9 - Enhanced Deflating using Deflate64(tm)
10 - PKWARE Data Compression Library Imploding (old IBM TERSE)
11 - Reserved by PKWARE
12 - File is compressed using BZIP2 algorithm
13 - Reserved by PKWARE
14 - LZMA
15 - Reserved by PKWARE
16 - IBM z/OS CMPSC Compression
17 - Reserved by PKWARE
18 - File is compressed using IBM TERSE (new)
19 - IBM LZ77 z Architecture
20 - deprecated (use method 93 for zstd)
93 - Zstandard (zstd) Compression
94 - MP3 Compression
95 - XZ Compression
96 - JPEG variant
97 - WavPack compressed data
98 - PPMd version I, Rev 1
99 - AE-x encryption marker (see APPENDIX E)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37929829
复制相关文章
相似问题
腾讯云开发者
