pywebp doesn't expose "target_size" parameter to limit the maximum size of the resulting file.

[john-parton]

The webp API supports saving with a "target_size" parameter to limit the maximum size of the resulting file.

int target_size;        // if non-zero, set the desired target size in bytes.
                        // Takes precedence over the 'compression' parameter.

https://developers.google.com/speed/webp/docs/api

As far as I can tell, this isn't exposed in pywebp.

This would be a useful feature for me, because I'm using CloudFlare images with has a hard 10MB cap on image size. It would be nice to just set the file size to just under 10MB and remove guesswork about appropriate Q values.

See also:

• webp save methods do not support 'target_size' parameter libvips/libvips#3822
• Add support for libwebp 'target_size' parameter libvips/libvips#3824

[anibali]

I just had a go at implementing this in #64. Would that PR meet your needs?