this post was submitted on 20 Oct 2024
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datahoarder

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I know for photos i could throw them through something like Converseen to take them from .jpg to .jxl, preserving the quality (identical visially, even when pixel peeping), but reducing file size by around 30%. What about video? My videos are in .h265, but can i reencode them more efficiently? im assuming that if my phone has to do live encoding, its not really making it as efficient as it could. could file sizes be reduced without losing quality by throwing some processing time at it? thank you all

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[–] AnEilifintChorcra@sopuli.xyz 2 points 2 weeks ago* (last edited 2 weeks ago)

I'm a big fan of AV1, I've reencoded TiBs of video files to AV1. Reencoding is always going to lead to some quality loss, it just depends how much you notice it. For me I, don't see any quality loss going from h265 to AV1 in any videos I have done with my settings. But the biggest screen I use is 32inch 1080 monitor from about 5 years ago.

Its totally subjective so it may be worth taking a couple of your favourite video files and testing out a bunch of different settings and comparing the quality to see if theres a noticeable quality loss. Then you can weigh up the quality vs time taken vs storage cost to see if its worth it to you.

It can be slow, depending on what hardware you're working with but I've seen massive speed improvements over the past few months. ATM, I'm getting between 10 - 20 times speed up. So if I encode a 10 minute video, it takes between 30-60 seconds. This is with a 7700x, 12 cores. And I'm getting anywhere from ~10 times smaller file size to ~70% the original size.

Another option I use sometimes is converting to 720p from 1080. I do this on some videos that my parents take because their cameras aren't great and they have shaky hands so they're pretty blurry at the best of times anyway lol.