BOOK LAUNCH — How to make books more sustainable?

→ How to make books more sustainable? Inspired by the image compression on its solar-powered website, Low-tech Magazine squeezed the article catalog of their three-volume book series into just one book. Compressing the content — an editorial and design choice — produces a larger reduction in resource use than printing on recycled paper could ever do.

→ During this book launch event, we present our "Compressed Book Edition", followed by a public discussion on sustainability in the book publishing business. We also have a number of copies for sale during the event.
18:45 Doors open
19:00 Book launch
19:30 Q&A
19:45 Book sale / snacks & drinks / networking / low-tech showcase ;)

Barcelona — Akasha HUB, Carrer de la Verneda 19 (El Clot)

sign-up on meetup! (https://www.meetup.com/akashabarcelona/events/306644137/?utm_medium=email&utm_source=braze_canvas&utm_campaign=mmrk_alleng_event_announcement_prod_unfiltered_v7_en&utm_term=promo&utm_content=lp_meetup&dispatch_id=67ceebedb8e8eab07052f4842939fd80)
poster by our intern Hugo Lopez

Have you ever thought about how amazing modern #video #compression is?

When #QuickTime came out in 1991, the video codecs didn't save you much space, and were very primitive. You could see the (temporally) repeating blocks very obviously, and they didn't have a lot of finesse.

Cinepak was the first one that had some real compression muscle, then Intel Indeo and others.

I've got a 113-second, 720x1600 video that SHOULD take up 21GB of data raw, but easily compresses down to 16MB, and I can hardly tell the difference.

That's 1360:1 savings!

I love playing around with #compression

In this case, it's all text-based data in csv and xml formats.

Size:

32,696,320 202411.tar
 4,384,020 202411.tar.bz2
 4,015,912 202411.tar.zst
 3,878,583 202411.tar.bz3
 3,730,416 202411.tar.xz

zstd was invoked using zstd --ultra -22
xz was invoked using xz -9e
bzip2 was invoked using bzip2 -9
bzip3 has no compression level options

Speed:

zstd    54.31user 0.25system 0:54.60elapsed 99%CPU
xz      53.80user 0.06system 0:53.93elapsed 99%CPU
bzip2    5.33user 0.01system 0:05.35elapsed 99%CPU
bzip3    3.98user 0.02system 0:04.01elapsed 99%CPU

Maximum memory usage (RSS):

zstd    706,312
xz      300,480
bzip3    75,996
bzip2     7,680

*RSS sampled up to ten times per second during execution of the commands in question

#bzip3 is freaking amazing, yo.

#DataCompression #bzip #bz3 #zstd #zst #zstandard #xz #lzma
#CouldaBeenABlost ;)

https://linuxiac.com/7-zip-24-09-file-archiver-enhances-lzma-compression/

Via @linuxiac

Version 24.09 of 7-Zip, has been released with enhancements including increased default dictionary sizes for LZMA and LZMA2 compression methods, new hash checksum options, and improved support for APM and HFS filesystems.

Additionally, the new version includes bug fixes and shows progress when moving archives during update operations.

My friend wrote their own video codec: https://github.com/LMP88959/Digital-Subband-Video-2/

Give it a look! It rarely gets as cool as this! :)

How Discord reduced #websocket traffic by 40% - their experience replacing #zlib by #zstandard and other cool topics
https://discord.com/blog/how-discord-reduced-websocket-traffic-by-40-percent