Opencv hardware acceleration not working

[cudawarped]

Hi, I would read the following post to see if it helps

Trouble using NVDIA hardware decoder when streaming from Camera

I was refering to the source of information, sorry for the confusion. The point is cv::cudacodec::VideoReader() should work on all versions of CUDA any information to the contrary may be for specific circumstances which I would be interested to investigate if you have a link to the information? Anyway this thread is getting confusing, I have just performed some tests on my build of 4.5.5 to confirm everything is working as it should, and it appears to be. I will try to compress the relevent …

If you don’t have time and you are on windows, then opening your stream with

cap = cv.VideoCapture(SRC_PATH, cv.CAP_FFMPEG, [cv.CAP_PROP_HW_ACCELERATION, cv.VIDEO_ACCELERATION_D3D11 ]);

should enable Nvidia hardware decoding.

The environmental variables you were setting look wrong to me, but I don’t have time to test them to be 100% sure.

@Chun_Leong_Lee

os.environ[ “OPENCV_FFMPEG_CAPTURE_OPTIONS”] = “hwaccel;qsv|vsync;0”

Would enable quicksync if it worked which is not what you want.

@Chun_Leong_Lee

os.environ[ “OPENCV_FFMPEG_CAPTURE_OPTIONS”] = “video_codec”

This as far as I know wouldn’t do anything as you haven’t specified the video codec.