Question about NVENC in 14.2.0

[nagadomi]

14.2.0 binary wheel package includes h264_nvenc and hevc_nvenc in av.codecs_available but they do not work.

 [Errno 38] Function not implemented: 'avcodec_open2(h264_nvenc)'; last error log: [h264_nvenc] The minimum required Nvidia driver for nvenc is (unknown) or newer

When I build av from source (link the local ffmpeg library) it works.

Is there some condition for this to work? Or is it included in av.codecs_available even though it does not work?

OS: Ubuntu, Nvidia Driver 560.35.05

[WyattBlue]

Is this possible to replicate on Windows?

[nagadomi]

Yes, Windows Laptop PC with NVIDIA GPU(GTX1050) showed the same error.

(The error dialog is from my software, but it simply shows the exception)

On Windows VirtualMachine (No NVIDIA GPU), I got an error message that nvcuda.dll was missing.
Probably because NVIDIA Driver or CUDA is not installed.

[WyattBlue]

I figured out why it's not working for you:

https://github.com/FFmpeg/nv-codec-headers
Minimum required driver versions:
Linux: 570.0 or newer
Windows: 570.0 or newer

[nagadomi]

Thank you. I'll give it a try, but it would be better to use a lower SDK version.
That repository seems to have a separate branch for each version.
I updated my NVIDIA drivers just a few weeks ago.

[nagadomi]

On Windows, I installed NVIDIA Driver 572.83 and it worked.
Ubuntu does not have nvidia-dirver-570 yet. (EDIT) I installed nvidia-driver-570-server and it worked.

https://github.com/BtbN/FFmpeg-Builds (ffmpeg build I use locally) seems to use nv-codec-headers “sdk/12.2” branch to build ffmpeg 7.1.

[seatv]

I am running Windows 11, with NVidia Driver 572.61. Here is the output of hwconfigs and hwdevices

D:\MyProjects>py -m av --hwdevices --hwconfigs
Hardware device types:
    cuda
    dxva2
    d3d11va
    d3d12va
Hardware configs:
    av1
        <av.HWConfig device_type=dxva2 format=dxva2_vld is_supported=True at 0x-13b8c850>

Will I be able to use NVidia decoders and encoders (PyAv 14.2.0) installed with pip install av.

[seatv]

I can confirm that NVidia Driver 572.61 and PyAV 14.2.0 will let one use the NVIDIA hardware codecs.