[MyOwnSpirit]

hevc (h.265) has specialized hardware which encodes or decodes much faster than other GPU solutions. I believe typical graphic cards come with hardware codecs within them but I am not sure. Regarding why hevc isn't so easy to use with GPU, it comes from the way video compression is done. In video compression, you don't really process each pixel one by one independently. Instead, you consider blocks of pixels and you look for similar ones in other pictures. So it is not much about having many similar small tasks but really one big one. Besides, to minimize the information to send (i.e. to compress better), the compression of each block is based on what the left and top blocks have done. If I compress all my blocks in parallel, I will not be able to make them use each other's information. Does this help you see the big picture?