[aaravchen]

Are you talking about manually pre-transcoding to a more streaming-friendly format? Since anyone taking about issues with transcoding is almost certainly talking about 4K formats (anything else is almost no load even on 10 year old hardware), I'd be interested to know what format you're picking that retains 4K Dolby Vision and/or HDR10 with the Atmos audio and is supported for more efficient non-transcoded transfer by the Plex client and server software. Certainly some are better but only work on specific clients, I haven't heard of a good efficient format that works on the majority of client devices.