Both of the CPUs you mention are low-power I don't think this a problem for slightly meatier processors unless you need the GPU or Quick Sync for multiple purposes?

Sure, you can get a meaty recent-gen Intel processor and get Quick Sync and plenty of cores, it just gives you awkward dependencies - you then a) can't get a non-Intel-based system without losing Quick Sync even if they're better value/performance/performance-per-watt and b) you can't upgrade your transcoding CPU without doing a whole new build of your meaty system, which is high-cost if you've got an especially meaty system.

(You might want to upgrade your transcoding box to a newer generation processor that supports, say, AV1 encoding.)

And FWIW my Ryzen Embedded system isn't especially low-power by design, it was just the most accessible way of getting ECC memory for me.