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Compression! (lemmy.dbzer0.com)

submitted 4 months ago by irelephant@lemmy.dbzer0.com to c/iiiiiiitttttttttttt@programming.dev

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[–] Opisek@piefed.blahaj.zone 32 points 4 months ago (2 children)

Not necessarily. For example, you can't really compress encrypted files. You can certainly try but the result will likely be what the meme portrays.

[–] Randelung@lemmy.world 31 points 4 months ago (1 children)

Turns out pseudo random byte streams don't really repeat that often.

[–] SkyeStarfall@lemmy.blahaj.zone 5 points 4 months ago

We just need to develop an algorithm to compress random byte streams, easy

[–] WolfLink@sh.itjust.works 7 points 4 months ago (2 children)

Media files are always thoroughly compressed (except in certain settings like professional video and audio work).

[–] rainwall@piefed.social 4 points 4 months ago (1 children)

Media files can can benefit from a codec change. Going from h264 to h265/hevc can net a 30-50% reduction in size for almost no quality loss.

The only trade off is increased cpu usage if the client doesnt have hardware h265 support and the time to do the transcoding.

[–] ulterno@programming.dev 3 points 4 months ago

And then comes AV1, with crazily varying quality/compression for different source materials.

[–] Opisek@piefed.blahaj.zone 1 points 4 months ago (1 children)

I don't see how that relates to encryption.

[–] WolfLink@sh.itjust.works 2 points 4 months ago

It’s more relevant to the previous comment as an example of how we are doing a lot of compression at the filesystem level.

The files that are typically largest are already quite thoroughly compressed.