I have python OpenCV vision code that works on some machines but not on others. In particular, on many WindowsXP machines, I don’t get any image from the camera, even when the camera is working.
There are a lot of suggestions that the problem somehow is my ffmpeg dll library configurations.
Advice would be welcome.
Thanks,
Martin
Possibly true – though, you’re not using OS-specific functionality to connect to the camera, so I can’t imagine what specifically would be different. Are you using the same binaries on all machines?
Also, make sure you have SP3 installed on XP.
Thanks - I’ll check re SP3. Other paths I think I have checked already. It would be nice to get an error dump from python or something that tells me why the VideoCapture failed. On some systems, it fails for the webcam but not for the built-in cam…
Turns out that my Windows PATH (Path) variable was not set to correctly include OpenCV. It should include something like:
C:\opencv\build\x86\vc10\bin;
…
at the beginning.
(This is set in System / Advanced / Environment Variables)
My educated guess is that this can work also if another appropriate \bin directory is chosen.