Adding getters and setters in VideoCaptureWrap

[fakob]

Hi,

I have added getPosition, getPositionMS, getFPS, getFourCC and setPositionMS.
setPositionMS is a duplicate of getFrameAt, but as it sets the position in MS I find getFrameAt confusing and would deprecated that in the future.

What do you think?

[codecov-io]

Codecov Report

Merging #559 into master will decrease coverage by 0.28%.
The diff coverage is 16.12%.

@@            Coverage Diff            @@
##           master    #559      +/-   ##
=========================================
- Coverage   51.19%   50.9%   -0.29%     
=========================================
  Files          34      34              
  Lines        3899    3929      +30     
  Branches       27      27              
=========================================
+ Hits         1996    2000       +4     
- Misses       1903    1929      +26

Impacted Files	Coverage Δ
src/VideoCaptureWrap.h	0% <ø> (ø)	⬆️
src/VideoCaptureWrap.cc	43.28% <16.12%> (-5.26%)	⬇️

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[peterbraden]

Looks great, any chance you could add an example file or some tests? Thanks!

[fakob]

I have never done that before as I am not a professional :-), but I will look into it.

[btsimonh]

hi fakob - in terms of a test, copy an existing example (e.g. examples/motion-track.js), and make it access each of the getters/setters in VideoCapture - this should be enough to ensure that they get tested regularly, and should contribute to coverage percentage. I just did that for examples/bgsubtractor.js ; if you want another video-reading sample to look at.