[CLI] Different results between CLI and Web

I used the CLI to output a jpg using --mozjpeg and --webp, but using the same options given on the tool based on the web, the output given to me is different.

Output on the web: mozjpeg -> 92.4kb webp -> 51.6kb

Output using the CLI: mozjpeg -> 84.9kb webp -> 13.2kb

Also, CLI affects the space color of the image and gives a bad compression, resulting in a worst processed image, comparing with the tool based on the web. I used the same .jpg source for this test, and the same options (I copied the same code that offers the web, the npx command).

I used on the CLI:

webp version

squoosh-cli --webp '{"quality":75,"target_size":0,"target_PSNR":0,"method":0,"sns_strength":50,"filter_strength":60,"filter_sharpness":0,"filter_type":1,"partitions":0,"segments":4,"pass":1,"show_compressed":0,"preprocessing":0,"autofilter":0,"partition_limit":0,"alpha_compression":1,"alpha_filtering":1,"alpha_quality":100,"lossless":0,"exact":0,"image_hint":0,"emulate_jpeg_size":0,"thread_level":0,"low_memory":0,"near_lossless":100,"use_delta_palette":0,"use_sharp_yuv":0}' -d out 30.jpg

mozjpeg version

squoosh-cli --mozjpeg '{"quality":75,"baseline":false,"arithmetic":false,"progressive":true,"optimize_coding":true,"smoothing":0,"color_space":3,"quant_table":3,"trellis_multipass":false,"trellis_opt_zero":false,"trellis_opt_table":false,"trellis_loops":1,"auto_subsample":true,"chroma_subsample":2,"separate_chroma_quality":false,"chroma_quality":75}' -d out 30.jpg

[letitz]

I get particularly bad results trying to compress an image to webp using the CLI. Online the result is fine, but offline it does not seem the encoder options are being respected. I get potato quality regardless of the options I pass to the CLI. Tried copy/pasting the CLI from the webapp too, to no avail.

[surma]

I figured out the potato quality on WebP. Seems like I bundled an old version of the WebP Wasm binary by accident. I fixed that and published @squoosh/cli@0.6.1.

I still see some minor file size difference, even when I use a PNG source file, which is very surprising to me. I’ll look at that another time.