ctypes error: libdc1394 error: Failed to initialize libdc1394

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

libdc1394 is a library for controlling camera hardware. I presume it comes the opencv you link in. Maybe the kernel driver does not load ? I guess there is a number of reasons why it can fail.

Maybe some OpenCV expert can answer better. But I bet the problem is on OpenCV lib side.

Some initial search for the same error message yielded results with the same reason [1, 2]. So if you can't find /dev/raw1394 on your file system try those.

UPDATE:

It seems like this is only a warning. The module raw1394 seems to be deprecated and some libdc1394 version might be looking for it while it disappeared with an update. Searching for it gives many results and bug reports. But it seems that the software should run fine. So if you don't really need it you can just ignore it. [3, 4]

Okay. I spent a entire day on it.

Basically, the link between /dev/raw1394 and /dev/null is not permanent. You can bash into your VM, call ln /dev/null /dev/raw1394, but it will last only until you re-start your container.

What I had to do, that seemed to be the simplest, but not the perfect approach, is to place the linking during the startup of the Container.

I thought in Running it as a service, but seemed too much for a simple job.

The way I finally came to work, (it's not pretty, but works), is by changing the CMD of the Dockerfile:

CMD sh -c 'ln -s /dev/null /dev/raw1394'; <your-script-here>