Add support to different webcam(s)

[No-CQRT]

ImagePlay works well, on my Linux box , but my default webcam (laptop integrated) is poor quality. It will be nice to set another webcam via settings, or, better work with several video sources at same time. Can i override some settings via the settings.json file?

[schmk2]

We had an experimental feature which only worked with certain webcams... You can try enabling the following lines and then recompile:
IPL/src/processes/IPLCamera.cpp Line 75-86