71b675331a
iOS16 upholds AVIF standards more strictly than other renderers, which means that the current AVIF images on SE are broken. A fix for generation bug has been added to go-avif (https://github.com/Kagami/go-avif/pull/17) but we can do better. This PR switches out the AVIF generation to cavif (https://github.com/kornelski/cavif-rs) which not only doesn’t suffer from the iOS16 but drops generation time by more than 8 times. For example, here’s a set of three timed runs in both go-avif and cavif on the title card of https://standardebooks.org/ebooks/jonathan-dymond/an-inquiry-into-the-accordancy-of-war-with-the-principles-of-christianity: ``` root@f58fb0beac90:/standardebooks.org/web/scripts# time ./go-avif -e "illustration.jpg" -o "illustration-go-1.avif" --best real 0m31.191s user 1m39.113s sys 0m1.662s root@f58fb0beac90:/standardebooks.org/web/scripts# time ./go-avif -e "illustration.jpg" -o "illustration-go-2.avif" --best real 0m33.097s user 1m49.846s sys 0m0.831s root@f58fb0beac90:/standardebooks.org/web/scripts# time ./go-avif -e "illustration.jpg" -o "illustration-go-3.avif" --best real 0m36.963s user 2m4.235s sys 0m0.711s root@f58fb0beac90:/standardebooks.org/web/scripts# time ./cavif --quality 50 "illustration.jpg" -o "illustration-cavif-1.avif" illustration-cavif-1.avif: 98KB (96840B color, 0B alpha, 242B HEIF) real 0m4.017s user 0m11.600s sys 0m0.051s root@f58fb0beac90:/standardebooks.org/web/scripts# time ./cavif --quality 50 "illustration.jpg" -o "illustration-cavif-2.avif" illustration-cavif-2.avif: 98KB (96840B color, 0B alpha, 242B HEIF) real 0m4.083s user 0m11.857s sys 0m0.091s root@f58fb0beac90:/standardebooks.org/web/scripts# time ./cavif --quality 50 "illustration.jpg" -o "illustration-cavif-3.avif" illustration-cavif-3.avif: 98KB (96840B color, 0B alpha, 242B HEIF) real 0m4.237s user 0m12.339s sys 0m0.093s ``` The executable has been generated via cargo, and has the following qualities: ``` root@f58fb0beac90:/standardebooks.org/web/scripts# file cavif cavif: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=f972071996c58b7a855d04e4c5804f4a3d94f575, for GNU/Linux 3.2.0, with debug_info, not stripped ``` I’m not sure how cavif’s quality 50 matches go-avif’s best flag, but they produce similar file sizes and similar visual quality. There is a slight different in apparent colour space. If this is an issue there are tweaks, but according to the documentation it makes files larger so should be avoided. Given that the titlecards will matches the covers I see no reason to go down that path. |
||
|---|---|---|
| .. | ||
| cavif | ||
| delete-unconfirmed-newsletter-subscribers | ||
| deploy-ebook-to-www | ||
| generate-bulk-downloads | ||
| generate-feeds | ||
| process-pending-payments | ||
| README.md | ||
| rebuild-cache | ||
| reset-php-fpm-opcache | ||
| rotate-www-logs | ||
| sync-ebooks | ||
| update-patrons-circle | ||
sync-ebooks
To use, call this script with the directory where your ebooks go as its last argument. For example sync-ebooks /standardebooks.org/ebooks, or if you want to clone them into this repository, sync-ebooks ebooks. If you want progress output, use -v, and if you want detailed Git progress output use -vv. GitHub allows you to make 60 unauthenticated API requests per hour. If you use unauthenticated API requests for other things, this might not be enough, so to resolve that issue, you can create a new OAuth token at https://github.com/settings/tokens/new and pass it via the --token option. You don’t need to give the token any permissions.
deploy-ebook-to-www
To use, call this script with the directories of the books you want to deploy as its arguments. For example, to deploy all ebooks after using sync-ebooks, run deploy-ebook-to-www /standardebooks.org/ebooks/*. To deploy only The Time Machine by H. G. Wells, you would run deploy-ebook-to-www /standardebooks.org/ebooks/h-g-wells_the-time-machine. To output progress information, use -v or --verbose.
The default web root is /standardebooks.org/web/www. If it is located elsewhere, specify it with the --webroot option. For instance, deploy-ebook-to-www --webroot /var/www/html /path/to/ebook. Note that there will be php errors if the Git repositories are not in the ebook directory immediately in the web root. Either keep them there or create a symlink.
The default group is se. to use a different one, specify it with the --group option.
The default URL is https://standardebooks.org. To change it, use the --weburl option. For example, deploy-ebook-to-www --weburl "http://localhost:8080". This option will cause deploy-ebook-to-www to use the specified URL in the generated OPDS and RSS files. Care should be taken however; the URL https://standardebooks.org is hard-coded in a few places, even when SITE_URL is changed to a custom URL, so for testing, it may be more convenient to simply use /etc/hosts or a similar mechanism to resolve standardebooks.org to 127.0.0.1.