AttributeError: module 'PyNvCodec' has no attribute 'SeekMode'

[bralat]

Describe the bug
After building vpf from source in windows using the instructions in the wiki, I got the following error when I tried to run python SampleDecode.py

AttributeError: module 'PyNvCodec' has no attribute 'SeekMode'

To Reproduce
Steps to reproduce the behavior:

1. Follow instructions to install on windows
2. go to the build folder
3. run python SampleDecode.py
4. see the error

Expected behavior
I expected SampleDecode.py to print a description of the file and options it expects

Desktop:

• OS: Windows 10 Home
• Nvidia driver version 471.21
• CUDA Version 11.0
• Video Codec SDK Version 9.1.23
• Python Version 3.8
• Visual Studio 17

Additional context
I started with python 3.7 as stated in the wiki but I got a different error that was only resolved after switching to python 3.8

[rarzumanyan]

Hi @bralat

Did you re-built the VPF after you've switched from Python 3.7 to Python 3.8?

[bralat]

@rarzumanyan Yes I did. Eventually, I figured I was supposed to run the command in the bin folder and not the build folder. That gave me a new error previously reported here. Using procman as you recommended helped resolve the dependency issues. Thanks!

I know the wiki is probably aimed at experienced C developers but there might be novices like me who may not know the obvious. It will be great if the instructions were a little more specific in some areas. For example Run one of the Samples to check that build is fine. Every folder I run it in gave me an error so I had no idea where to even start looking for solutions.

Also, the zeranoe website has been shutdown and the alternative ffmpeg builds have many variants. It will be nice to point users to the right one. What worked for me was ffmpeg-n4.4-80-gbf87bdd3f6-win64-gpl-shared-4.4 on this github page

[rarzumanyan]

Hi @bralat

Please take a look at #237, it looks very similar.

t will be nice to point users to the right one.

Thanks for the update, I was unaware of that. Will add to wiki.

[riaqn]

I'm seeing the same issue - how can I provide more information? I'm sure all my environment variables are correct. I used this build script: https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=nvidia-vpf-git

Also when compiling I see that void PyEval_InitThreads() is deprecated. I think this is because I'm using python3.9 and pybind 2.1.1 is simply too old - is that related to my problem?

[riaqn]

Copying /usr/lib/python3.9/site-packages/PyNvCodec/PyNvCodec.cpython-39-x86_64-linux-gnu.so to the same directory as SampleDecode.py works... wierd...

EDIT: OK, the correct path should be /usr/lib/python3.9/site-packages/PyNvCodec.cpython-39-x86_64-linux-gnu.so, without the subdir.

[ilia-chelak-adoria]

Hello, I came across this issue as well but was able to solve it. In case it helps anyone in the future, this is how I done it:

Run sample scripts not from your VideoProcessingFramework/ folder but from the VideoProcessingFramework/install/bin folder. Likewise, to use VPF in your scripts add VideoProcessingFramework/install/bin to the system path.

Hope it helps, cheers!

[contentis]

Will be tracked in #395