All these three programs already come with Hardware supported encoding called Quicksync so the question comes up, where is the benefit?
There are three main reasons why Voukoder is better then Quicksync.
The main problem is, that Quicksync only works with Intel CPUs with an integrated GPU. Which is something most people don’t have. Voukoder on the other side works with GPUs both from AMD and Nvidia which are much more comment, especially in a PC with high performance.
The second benefit is, that Quicksync only Supports the h.264 and h.265 Codec and it is very limited in the settings for these Codecs to. Which makes it unusable for many cases. Voukoder Supports: