Compatibility with mozjpeg

[selwin]

Hi there, I was just wondering whether it's possible to use pillow with the newly announced https://github.com/mozilla/mozjpeg/ . Sorry if this is a dumb question

[wiredfool]

Probably, but it might take passing different options in. We already work with libjpeg-turbo, as it's the default on at least one of the linux platforms. As long as they keep the api the same, I don't think it's going to be a major issue to drop it in.

[aclark4life]

Does jpeg2000 support affect this in any way?

[wiredfool]

Nope. Different format.

[blaise-io]

From mozjpeg's readme:

'mozjpeg' is not intended to be a general JPEG library replacement. It makes tradeoffs that are intended to benefit Web use cases and focuses solely on improving encoding. It is best used as part of a Web encoding workflow. For a general JPEG library (e.g. your system libjpeg), especially if you care about decoding, we recommend libjpeg-turbo.

So there may be some caveats even if it's compatible.

[andreymal]

I intalled mozjpeg as default libjpeg in my Arch Linux, and Pillow can't save JPEG files with it:

I/O suspension not supported in scan optimization
Traceback (most recent call last):
  File "./local/genpreview.py", line 33, in go
    cropped_im.save(image_path, quality=75)
OSError: encoder error -2 when writing image file

Pillow still can't work with mozjpeg? Or this is my local problem somewhere?

libjpeg-turbo works good.

[wiredfool]

As far as I know, it's never been tested with mozjpeg.

[rohit-saharan]

+1 , @andreymal its still a problem.