Video_Codec_SDK_8.2 Sample program AppEncD3D11 reports on EncOpenEncodeSession

Professional Graphics and Rendering Video Technologies Video Codec and Optical Flow SDK
#1

i am working in Windows 10.
When i apply AppEncD3D11 i get EnvOpenSession error 2 (corresponding to ‘unsupported device’).

AppEncD3D11.exe -i C:\Slava\test.rgb -s 352x288 -codec hevc -preset hq -profile main -rc vbr_hq -fps 30 -gop 30 -bf 0 -bitrate 500K -o C:\Slava\nvideo.h264
GPU in use: NVIDIA GeForce 930MX
NvEncoder::NvEncoder : m_nvenc.nvEncOpenEncodeSessionEx(&encodeSessionExParams, &hEncoder) returned error 2 at c:\video_codec_sdk_8.2\samples\nvcodec\nvencoder\nvencoder.cpp:54

Any ideas how to sort out this issue.

#2

930MX/930M/940M/MX110/MX150… have GM108 chip. There is no NVenc on GM108 chip !
Nvidia mark it clearly in small text under table “* Except GM108” (see https://developer.nvidia.com/nvidia-video-codec-sdk#NVENCFeatures and https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units).

#3

Thanks a lot.

i am surprised why 930MX does not support encoding? It’s really strong processor (384 cores).

#4

GM108 and GP108 are scale down chips (less SM and no NVenc SOC but still NVdec SOC on GP108 chip). For example compare GP102 (471mm^2), GP104 (314mm^2), GP106 (200mm^2), GP107 (132mm^2) and GP108(74mm^2) (no published data for GM108). GM108 and GP108 are smaller, cheaper and less power for notebook.
You can use CUDA cores (SM but not NVenc SOC) for encoding. Search back to ~2010 for CUDA-only h264 encoders (like NVCUVENC or jpegNPP form NVidia CUDA older SDK).

#5

so the mx150 support nvdec api?

#6

MX150 is GP108 and NVdec should work (by Nvidia matrix). But be warned that Nvidia does not publish all specifications and sometimes publish incorrect information (yes, I lost some $$$ too https://devtalk.nvidia.com/default/topic/546409/gtx-770-and-compute-capability-3-5/).
(Nvidia updated https://developer.nvidia.com/nvidia-video-codec-sdk#NVDECFeatures - “* Except GM108 (not supported)”.)