If I was after encoding performance, I wouldn't buy a Ryzen. If I was after rendering performance, I wouldn't buy a Ryzen. Throw an mid-range nVidia on there for OpenCL, and the only CPU that makes sense for that price range is the 7700K.
I expect if AMD went back through again, they could improve them even more.
(In the handbrake case, most likely it's half-speed AVX2 that is hurting them)
But why? http://www.anandtech.com/show/11170/the-amd-zen-and-ryzen-7-...
The benchmarks show Ryzen being the obvious choice other than cinebench single threaded.
Only if you are using a shitty software renderer or are completely stupid would you do rendering on the CPU.
The Ryzen performs nicely on the encoding tests, though that will be performed by the GPU soon. It already can be (NVENC and AMD VCE), but the quality isn't quite as good as everyone's favorite h.264 encoder, x264.
If you're after pure performance, then you simply go with the best for your use case, whether it is Ryzen or not.
If you're on a tight budget, however, things get interesting.
hence, "things get interesting"