Compress image "jpg" with cjpeg command

[hoa89nguyen]

Hi All, When i perform this command cjpeg -quality 90 /test.jpg >/test_output.jpg, I received the error: Unrecognized input file format --- perhaps you need -targa I see in usage.txt, we only support PPM, PGM, BMP,RLE. Do we have any workaround solution to reduce the image with JPG format?

Many thanks,

[kornelski]

You've used cjpeg command from libjpeg, rather than the cjpeg command from mozjpeg.

Compile mozjpeg, and potentially use relative paths like ./cjpeg or ./cjpeg-static instead of old system-wide cjpeg.

Or ideally, compile another tool like ImageMagick with MozJPEG instead of libjpeg, and don't use cjpeg at all.

I can also recommend using https://github.com/imazen/imageflow

[zvezdochiot]

@hoa89nguyen say:

Do we have any workaround solution to reduce the image with JPG format?

• https://github.com/danielgtaylor/jpeg-archive
• https://github.com/ImageProcessing-ElectronicPublications/jpeg-recompress
• https://github.com/ImageProcessing-ElectronicPublications/jpegquant
• https://github.com/technopagan/adept-jpg-compressor
• https://github.com/tjko/jpegoptim

[magicdawn]

npm i handy-img -g

using sharp to decode img, and mozjpeg wasm version encode