I’m here because support said ask subj here.
Many SAT feeds are in 4:2:2 chroma subsampling now and while in case of h264 1920x1080 4:2:2 50(60)Hz streams my 3-core AMD Athlon II X3 460 3.4 GHz (Rana core) enough for software decoding with 45-70% load of each core but for 4K h265 4:2:2 50(60)Hz i.e. 20180428-175510_4K ENC 3 RMAD VS LEG.ts (563MB) 20180428-175510_4K ENC 3 RMAD VS LEG.ts — Yandex.Disk my CPU isn’t enough - it can decode just ~1fps - just expancive Core i7 or Ryzen can play that file fluently.
I’m sure ** 4:2:2 is not natively supported on HW in [url]https://developer.nvidia.com/nvidia-video-codec-sdk#NVDECFeatures[/url] is written because many people want have hardware acceleration for 4:2:2 but in some reason (I believe it don’t too hard to implement this - Turing with support hardware acceleration decoding of 4:4:4 is proof) any videocard manufacturers (nVIDIA, AMD and Intel) don’t want support this in their products (
Btw some models of standalone SAT set-top-boxes can decode 4:2:2 streams.
I want that mainstream and comparatively cheap processors like Core i3 or Ryzen 3 with one of the future nVIDIA videocard can play 4K (and even 8K) h265 4:2:2 50(60)Hz streams fluently with low CPU load.
In conclusion: My new videocard (desirable nVIDIA - it can easily set native 50Hz output) must support 4:2:2 chroma subsampling or I just don’t buy it (because I have good enough Palit GTX750v2 on GM206 for HW decoding 4K h265&vp9 4:2:0) in a future ;)
How many generations of videocards SAT-amateurs have to wait until videocard supported 4:2:2 chroma subsampling hardware acceleration out?