transcoding help for Raspberry Pi 4?

[dvdr]

Hello
after reading several posts and the user guide, I still do not fully understand the transcoding options - sorry, if I missed important info...
I have not yet installed MinimServer2, since maybe, my goal can't be achieved - I kindly ask for your help to figurethings out.

My music should run off a Raspberry Pi 4 with 4 GB RAM. It consists of a wide variety: mostly .flac, some .mp3 and .wav, a greater number of .dsf, some .aiff. Source quality: ripped CDs in 44.1/16, HiRes downloads ranging from 44.1/24 to 192/24, DSD 64/128

The goal: I would like to transcode every file to 176.4/24 or 192/24 wav, depending on the original sampling frequency (44.1/88.2 -> 176.4, 48/96 -> 192, 176.4/192 untouched, but all files transcoded to 24bit).
As far as I understood, there is no need to install additional software for .flac-files, but for everything else, there is special transcoding software like ffmpeg needed, right?

I wonder, whether the RPi4 is able to handle that, and if so: what do I need, are there installation-guides for additional transcoding software? Also: as far as I understood, I will have to write a pretty extensive set of transcoding instructions for every file type, right - could you give me an example, please?

Thansk for helping in the matter!