live streaming of games), the GPU Encoding of video can help to reduce system load. So for best quality and speed, a strong CPU still is the best way to do x265 encoding, paired with a GPU for filtering. As sonns as instructions for iFFT were available in the CPUs - you could easily go realtime. In times where iFFT was not available inside a CPU, it took a lot of time to calculate it. One good example is a iFFT, which is running much faster on something like a DSP, SSE in a CPU etc. I am considering using ffmpeg to do this, but if that doesnt do it well, I might also try mencoder. So I decided I would write a script to convert them on my own. which contained instruction sets offering calculation-possibilities previous models didn`t have bevore. On my Linux box, I couldnt find any GUI converter that satisfied me, and I was desperate to convert some videos from. What I thought is that baseline is an unstable algorithm, but found no place on the net to confirm my. There were a few times that a particular part of the video was looking fair, and other times it was pixelated as hell. Later there were things like 3dNow, SSE, AVX, etc. Hi All, I encoded a file a few times using baseline video profile and got a different result every time. Later CPUs already had a FPU in it, so calculations benefitting from a FPU ran faster on these. Think of the old 386, which didn`t have the FPU built on - it was a seperate chip you´d have to add. if a specific task is working faster on a "traditional CPU" or a GPU.ĬPUs are being equiped with more and more processing units which can give an advantage for things a GPU traditionally is good for. It all depends on the type if calculation, memory, memory bandwith. Running the same filters on a CPU is veryvery slow compared to a decent GPU. way lesser very potent cores on a CPU), some videofilters benefit heavily from Running the OPENCL Filter Code on the GPU. Since some filters for Videoediting fit the strenghts a GPU offers (heavy parallel processing with weak cores vs. everything you have an OPENCL driver for. This can be done on GPU, ASICS, CPUs, etc. With OPEN CL, you have an open Standard for calculating things like filters. x265 with normal to placebo settings is much better in terms of quality. The eoncding Engine on a GPU is not just a simple port of x265 to the GPU - intel, AMD, NVIDIA emplemented Encoder Units into the GPU, which only can do as good as the implementation is. Porting X265 to a GPU doesn't make sense (this is discussed in detail elsewhere). On GPU, you can only encode via the offered NVENC, QS-Video, etc. GPU vs CPU Encoding is a different thing than GPU vs CPU Filtering.
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