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
You will not gain much from reencoding or compressing these kinds of files. They are already compressed in a way purpose-built for their application. If you have source materials, like blu-ray discs, you can reencode with more aggressive h.265 settings. But this will probably not do better than shrink 5-30%.
It is usually a better use of time and resources to get more storage.
This is what I always think. The real movie was hundreds of gigs, maybe TBs. What you get on the Blu-ray is already compressed to all hell but perfectly mastered to hide as much compression as possible. Why would you want compress it even worse? Hard drives are cheap, if you already want to store 1080p/4k copies of movies, just admit you’re like us and pick up a couple 20TB drives