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A comment on YouTube no longer supports 4K video playback in Safari. Parent comment

Re:YouTube no longer supports 4K video playback in Safari by dogma1138 on Sunday January 15, 2017 @03:57PM (#13406362)
Yeah I meant to write NVIDIA not CUDA, FYI you need to login to download stuff from NVIDIA, try copying the URL with the auth parameter ;)

I've made a post about how VP9 is offloaded to GPU in this thread, it's done via DXVA/MF on Windows.

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Re:YouTube no longer supports 4K video playback in Safari by Veratyr on Sunday January 15, 2017 @05:27PM (#13406741)
One of the APIs is DXVA/MF on Windows but the underlying hardware is still NVDEC (and you can use the NVDEC API directly if you so choose). It and NVENC are specialised hardware modules.
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