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Searching in: Trouble Reports
ID: TR01Q09096
Added on: 2019-01-21
Last update: 2019-02-21
Solved in version: 6.5.6
Platform: All Platforms
Product: NoMachine Server
Severity: Minor
Status: Closed
NoMachine H.264 hardware encoding fails with Volta-based GPUs

NoNachine uses the NVIDIA Video Codec (NVENC) SDK version 4 for hardware accelerated encoding on Linux and Windows. NVIDIA cards based on Volta GPU microarchitecture require instead to use at least NVENC SDK 5.

In this case, the encoding used in the NoMachine session falls back to VP8. and the nxerror.log reports:
NvEncode: ERROR! Failed to encode frame.
NvEncode: ERROR! Error is 15, 'Invalid version'.
31806 32382 14:21:23 768.446 DisplayEncoder/DisplayEncoder: ERROR! Failed to encode H.264 frame.