Has somebody tried Videoproc?
"Currently, VideoProc is the only program that utilizes full GPU acceleration throughout 4K Ultra HD video processing. Dubbed "Level-3 Hardware Acceleration", this technology allows the program to deal with 4K speedily and smoothly.
Currently, about 65% of video transcoding programs have recourse to GPU acceleration for video encoding; 24% others can achieve both GPU accelerated video decoding and video encoding; however, none but VideoProc can get at full utilization of hardware acceleration in video processing, coupled with video encoding and decoding. This technology is called Level-3 Hardware Acceleration."
"Currently, VideoProc is the only program that utilizes full GPU acceleration throughout 4K Ultra HD video processing. Dubbed "Level-3 Hardware Acceleration", this technology allows the program to deal with 4K speedily and smoothly.
Currently, about 65% of video transcoding programs have recourse to GPU acceleration for video encoding; 24% others can achieve both GPU accelerated video decoding and video encoding; however, none but VideoProc can get at full utilization of hardware acceleration in video processing, coupled with video encoding and decoding. This technology is called Level-3 Hardware Acceleration."