Hi Forum,

I've been looking around on the net for this, but haven't found a satisfying solution yet. I capturing frames using my S-Video input under Linux. This works already and it works well using the OpenCV Highgui interface, their drawing functions, etc.

I would now like to integrate what I have done so far with Qt, because of various reasons: the program gets bigger and bigger, I need network support, and would like to add a more sophisticated GUI to, for example, interactively adjust threshold values, or save video files for offline use (preferably using ffmpeg).

I would have to add that I am new to Qt, but not to OpenCV or C++ programming. I have downloaded and compiled the latest version of Qt at the time of this writing (4.3.3) and successfully compiled some sample programs.

Now here are my questions:

  1. is there someone out there working with both OpenCV and Qt 4.x already?
  2. How can I display the captured frames in a Qt application?
  3. Are there any recommendations as to which drawing functions should be used (e.g. which are faster?)


Thank you guys in advance for any help or pointers.

Cheers,
Stephan