If you have a smart TV, just connect this excellent, inexpensive Toslink cable:
https://btpa.com/TOSLINK-XXX.html
in the appropriate length from smart TV to an iFi SPDIF iPurifier:
Then a good BNC-BNC coax from the iPurifier to your Pre-Pro like my Empirical Audio $275 Standard BNC cable in 4-foot length with adapters(never go less than 4 feet).
total cost: ~$460
This will reduce jitter from your TV feed and give you marvelous movie soundtracks in Dolby Digital from Netflix, Amazon Prime and Vudu.
Steve N.
Empirical Audio