[Question] How to compress with lz4 ?

[kramer04]

Using 7zz the file isn't compressed

$ 7zz a -tlz4 -mx9 boot_test.img.lz4 boot.img

7-Zip (z) 22.00 ZS v1.5.2 (x64) : Copyright (c) 1999-2022 Igor Pavlov : 2022-06-15
 64-bit locale=fr_FR.UTF-8 Threads:8

Scanning the drive:
1 file, 34906656 bytes (34 MiB)

Creating archive: boot_test.img.lz4

Add new data to archive: 1 file, 34906656 bytes (34 MiB)

               
Files read from disk: 1
Archive size: 35655086 bytes (35 MiB)
Everything is Ok

Using LZ4

$ lz4 -B6 --content-size boot.img boot_test.img.lz4
using blocks of size 1024 KB 
Compressed 34906656 bytes into 17656861 bytes ==> 50.58%      

[teoberi]

https://github.com/flyfishzy/p7zip#usage

[kramer04]

I saw Usage
but if i want a .lz4 file it doesn't works. It's only to compress with .7z file.

$ 7zz a boot_test.img.lz4 boot.img -mx9 -m0=lz4

7-Zip (z) 22.00 ZS v1.5.2 (x64) : Copyright (c) 1999-2022 Igor Pavlov : 2022-06-15
 64-bit locale=fr_FR.UTF-8 Threads:8

Open archive: boot_test.img.lz4
ERROR: boot_test.img.lz4
Cannot open the file as archive



System ERROR:
E_INVALIDARG : One or more arguments are invalid

[teoberi]

That's all for now!
As long as the development of p7zip stagnates and there are other forks but nothing unified, I stay with the original 7-zip for Linux.

[tansy]

Are toy sure it has lz4 compiled in or as a standalone codec?

It should be specified in $ 7z i. Under formats and codecs.

[jinfeihan57]

This seems to be a bug.Can you try the old version p7zip 17.04？

[jinfeihan57]

@kramer04 I fixed this BUG, you can try it.

[kramer04]

@jinfeihan57 Thanks bug fixed

$ 7zz a -tlz4 -mx1 boot_test.img.lz4 boot.img

7-Zip (z) 22.00 ZS v1.5.2 (x64) : Copyright (c) 1999-2022 Igor Pavlov : 2022-06-15
 64-bit locale=fr_FR.UTF-8 Threads:8

Scanning the drive:
1 file, 34906656 bytes (34 MiB)

Creating archive: boot_test.img.lz4

Add new data to archive: 1 file, 34906656 bytes (34 MiB)

               
Files read from disk: 1
Archive size: 17650357 bytes (17 MiB)
Everything is Ok