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Maybe you've installed the wrong version of the library? https://raspberrypi.stackexchange.com/a/108237
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I tried lots of combinations of versions but never got anything to work.
Eventually used the standard video library, but on realising I couldn't easily use a neopixel and processing at the same time swapped to python.
It's for an interactive nft artwork project controlled through a window and projected onto 7 screens on the side of a building.
I'm working on a processing project on raspberry pi. I'm trying to use the gl video library but cannot get it to work. I've followed the instructions but get the error "failed to load pluggin /file location cannot open shared file: no file or directory" . It's there and the user has access and you can find it using command line.
Any ideas on what to Google?