![]() ![]() Wikipedia is lacking details on what is in that video decoder ( Feature set J). It may be that 8k VP9 is not supported in hardware decode, or that the video is using 12-bit colour depth (Main 4:4:4 12) and as a result it requires a newer 20xx or 16xx graphics card. Yours should, at least, be able to decode 8k h.265 video. That puts it in the range of 20xx and 16xx and 10xx graphics cards. It's possible that the version of Windows 10 could affect this too (I am using 1809 Pro).įor an Nvidia card it appears that hardware decoding of 8K video requires their PureVideo Feature set H or higher: Feature Set Hįeature Set H are capable of hardware-accelerated decoding of 8192x8192 (8k resolution) H.265/HEVC video streams Make sure you're using the latest version for your video drivers and Chrome. My CPU is a Ryzen 5 3600X, so by no means should your i9-9900K be the bottleneck either. I tested that 3D video on my GTX 1070 and only 2 frames were dropped over 1136 frames (52s), the playback was also very smooth. I can't explain this one, but maybe it's possible that 3D videos are streamed with the full stereo data and the player is displaying it as 2D with local processing. How come the 60FPS footage looks smooth but drops a ton of frames, but the 24 FPS footage is choppy? I'm also not sure that NVIDIA has ever said that would be optimal on the GTX 1070, only that it is supported. It is likely that the video decoder in the GPU is hitting its maximum potential performance, since the CPU usage and GPU usage are not at 100% yet. That likely comes down to the sheer magnitude of 8K video. Since all of the YouTube links you tested are ( probably) VP9 Profile 0 videos, the GPU is being utilized by Chrome to play those videos. This explains why your chrome://gpu/ page displays support for "Decode vp9 profile0 up to 8192x8192 pixels". Your GTX 1070 can decode a max resolution of 8K, but its support for codecs that can be 8K is limited.Īccording to NVIDIA's Video Encode and Decode GPU Support Matrix your GTX1070 can only decode VP9 in 8-bit, or H.265 with 4:2:0 chroma subsampling. It won't be useful for 8K videos, but it's definitely an ideal hardware accelerator for 4K content using the latest codecs. You will need a GPU that supports 8K resolution and has a fast decoder for the codec used by the video.Īccording to WikiChip, the Intel UHD 630 Graphics in your i9-9900K can only decode any of those codecs at a maximum of 4K resolution. 8K is a very high bitrate though (up to 240 mbps), so maybe the i9-9900K is still not fast enough to decode that much data per second with no frame drops. Libraries like FFmpeg or libvpx provide the means to decode videos regardless of your hardware features, so a sufficiently fast CPU is one way to play 8K videos. ![]() To play 8K videos smoothly, you're either going to need a very fast CPU for software decoding, or a GPU with support for hardware accelerated decoding of one of those codecs. My best guess for what that vp09.00 first part means is that it's VP9 Profile 0, which is 8-bit and 4:2:0 chroma subsampling. ![]() ( It saves them a lot of bandwidth over H.265) Google is a major contributor to developing the VP9 codec, and thus YouTube prefers to stream this encoding for 8K videos. The some of the commonly used codecs right now for 8K would be:Īll of the YouTube videos you have linked report the following codec string: That depends on the codec used to encode that 8K footage. Decode vp9 profile0 up to 8192x8192 pixels.What is the bottleneck in the system? How come the 60FPS footage looks smooth but drops a ton of frames, but the 24 FPS footage is choppy, but no frames are dropped? What does it take to play back 8K? How does playback happen anyway?Įdit: For completeness sake, note that YouTube can display many technical playback stats when you right-click on the video and choose the "Stats for nerds" option.Įdit to add information requested in the comments: GPU activity on the 3D graph is ~30% this time and CPU coasts at ~30% as well.Īnd this video for example: Ghost Towns in 8K (FUHD) at 8K24 plays back without dropped frames or any perceptible issues at 30% CPU and 11% GPU utilization. In it, I do not drop any frames yet the video is stuttery and looks to play back at about 10 fps. The Daily Dweebs - 8K UHD Stereoscopic 3D by the Blender project. According to task manager there is no GPU decode and GPU activity levels out at ~20% on the 3D graph. It does look fairly smooth however, with occasional noticeable frame hitches. However, when I switch to 8K60 quality, the stats say I drop about 1/3 of all frames. ![]() I have found a video on YouTube that is absurdly high quality: For reference, my computer is 9900K, GTX 1070. ![]()
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