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NVIDIA Hardware Decode

What hardware video acceleration needs on NVIDIA graphics. Check vainfo there first.

NVIDIA needs the proprietary driver first — that is its own chapter, and everything here assumes it is already installed and working. The VA-API side is a shim that translates VA-API calls to NVDEC, and Fedora now ships it in the main repositories:

sudo dnf install libva-nvidia-driver

Two things to know about it. First, its own description says it is designed for Firefox's decode path and "may not operate correctly in other applications" — that is upstream's assessment, not a hedge. Second, it usually needs to be pointed at explicitly. The upstream project documents LIBVA_DRIVER_NAME=nvidia as required on current libva, NVD_BACKEND=direct as the recommended backend on driver 525 and later, and MOZ_DISABLE_RDD_SANDBOX=1 for Firefox. Check the upstream README for the current set before adding any of them permanently; the required variables have changed more than once.

For everything else on NVIDIA, VDPAU still works:

sudo dnf install vdpauinfo

vdpauinfo

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