This uses negligible CPU power, so the game gets the full power of the CPU. For recording, use a hardware encoder like nvenc. If your game already uses 80 of your CPU, there is no CPU power left for encoding with x264. I would think youd test x265 vs NVENC HEVC for an apples to apples, although that is a long video maybe he explains it somewhere. The encoders are within a 2 to 3 VMAF points of each other and I think the general rule of thumb is that 6 VMAF points of difference will result in a noticeable difference in video quality to most viewers, while differences smaller than that can be difficult for many people to spot. The resulting quality is worse than if you used a hardware encoder in the first place. Good call I was skimming the early sections and skipped to the end and missed the mixed comparisons of x264 vs NVENC HEVC /NVENC h.265 (and navi encoder) - a non-intuitive comparison. OBS NVIDIA NVENC (new), x264, Quick Sync VMAF (video multimethod assessment fusion). There is a comparison here between Quick Sync (Skylake version), NVENC (Maxwell version), and x264 Medium (software encoding):Īll 3 are close enough in terms of quality, such that if you are comfortable using x264 Medium, you should be fine using either of the hardware encoders as well.
QS has inferior quality but uses barely any CPU at all, since it's all done in the iGPU of the CPU. It depends on what you're streaming though. A few buddies of mine have tried it, and at the same bitrate, x264 looks better. I think the general consensus on recent versions of Quick Sync is that H.264 encoding quality is pretty good, but slightly behind NVidia's NVENC encoding. As the post states, it uses very little CPU. I think any improvements in H.264 quality were probably not as significant though or Intel would be touting them as they do the HEVC improvements: Ice Lake (10th Generation) did bring about Quick Sync improvements including gains in encoding speed and HEVC encoding quality. The name 'Quick Sync' refers to the use case of quickly transcoding ('converting') a video from, for. Quick Sync was introduced with the Sandy Bridge CPU microarchitecture on 9 January 2011 and has been found on the die of Intel CPUs ever since. Kaby Lake (7th Generation), Coffee Lake, and Comet Lake processors all share the same Quick Sync implementation so I'd expect encoding quality to be more or less the same across all of these processor versions. Intel Quick Sync Video is Intel 's brand for its dedicated video encoding and decoding hardware core. There were some significant improvements between the initial version of QuickSync H.264 encoding in 2nd Generation (Sandy Bridge) Intel Core processors up through 5th Generation (Broadwell) and 6th Generation (Skylake).īut I think most of the attention in more recent versions of QuickSync has gone towards the HEVC and VP9 encoding features, so any improvements in H.264 encoding quality have been fairly small in these more recent processor architectures.
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