UHD
> Can somebody tell me what the problem is after the last update of VLC?
1. it only works well with a software decoder (and decoding of 4K HEVC is rather demanding)
2. VLC's filter chain is single-threaded so the overall performance is somehow limited by a single-threaded CPU performance. BTW this was also the case for mpv before the last year (single-threaded output frames copying).
So mpv is much better in terms of performance and flexibility.
> about the impact that the number of channels and memory speed can have on smooth playback (SVP) of 4K 10bit HDR movies on a 4K 144Hz monitor?
I know that 4K/10-bit in mpv works on mine Ryzen 1700 @3500 MHz at ~2800 memory speed. Not with the highest settings though, but I don't thing the "highest" (i.e. "half-pixel mode") is even needed for 4K.