ctypes error: libdc1394 error: Failed to initialize libdc1394

python c++ shared-libraries ctypes libdc1394
fredley picture fredley · Oct 2, 2012 · Viewed 56.1k times · Source

I'm trying to compile my program to a shared library that I can use from within Python code using ctypes.

The library compiles fine using this command:

g++ -shared -Wl,-soname,mylib -O3 -o mylib.so -fPIC [files] `pkg-config --libs --cflags opencv`

However, when I try and import it using ctypes

from ctypes import *
mylib = CDLL("/path/to/mylib.so")
print mylib.test() // Expected output: Hello World

I get the following error:

libdc1394 error: Failed to initialize libdc1394

What's going on?

Answer

Vad picture Vad · Sep 25, 2014

Very frustrating that nobody actually shows a concrete solution. I had this issue after installing OpenCV. For me the easiest solution to remove this warning was actually to disable this driver:

sudo ln /dev/null /dev/raw1394

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