DXVA works with almost all graphics cards. CUDA works only with NVIDIA graphics cards, starting with GeForce 8 series and later.ĭXVA (DirectX Video Acceleration) is a Microsoft API specification for the Microsoft Windows and Xbox 360 platforms that allows video decoding to be hardware accelerated. The complex computing tasks are partially asigned to GPU resources via a special API provided by Nvidia. NVIDIA CUDA (Compute Unified Device Architecture), is NVIDIA's technology. It is also no longer being developed and does not support HEVC. ![]() QSV decodes on Sandybridge, for instance, cannot do ~29.x fps decode properly, failing with a green smudge for MPEG-4, VC-1 and H.264 content. QSV-Intel, NVIDIA CUVID and DirectX Video Acceleration (DXVA). 5KPlayer Hardware Acceleration and 5KPlayer AirPlay Hardware DecodingĥKPlayer now offers users three hardware decoding options: Especially when you are about to playback large video files like H.265 4K 8K 10bit videos or your CPU is heavily occupied already, for hassle-free glitches-free visuals, we highly recommend you enabling HW decoding to relief the pressure. Hardware decoding is generally to help reallocate the processing power to help reduce CPU overheating and improve overall functionality and speed. In conclusion, H/W decoder is using these chipsets to play videos whereas S/W decoder only uses CPU to play them. It activates graphic processing unit to precisely decode video files instead of using CPU in general while software decoding only uses CPU and software itself to handle all those data, which can be very slow and laggy, especially while you are online shopping or doing other CPU consuming activities and wishing to play an ultra high-definition video at the same time. The general purpose of GPU was to relieve the Central Processing Unit (CPU) of graphics-related tasks to ensure efficient workload.īriefly speaking, hardware decoding divides the processing burden from CPU to GPU. The term GPU was coined by NVIDIA upon the launch of GeForce video chips. GPUs descended from 3D accelerators used to render 3D graphics. Difference between HW Decoding and SW Decoding
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