[Feature] Webcam video processing for remote physiology (rPPG, ...) (EXPLORATORY)

[DominiqueMakowski]

Perhaps for 2.3

video_plot()

Can now easily plots some frames alongside physio signal(s); will be useful for debugging and validating

[codecov-commenter]

Codecov Report

Base: 53.32% // Head: 53.10% // Decreases project coverage by -0.21% ⚠️

Coverage data is based on head (b734ccb) compared to base (ac1f757).
Patch coverage: 13.80% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #736      +/-   ##
==========================================
- Coverage   53.32%   53.10%   -0.22%     
==========================================
  Files         284      290       +6     
  Lines       12869    12964      +95     
==========================================
+ Hits         6862     6885      +23     
- Misses       6007     6079      +72     

Impacted Files	Coverage Δ
neurokit2/ppg/ppg_report.py	100.00% <ø> (ø)
neurokit2/signal/signal_interpolate.py	64.44% <ø> (ø)
neurokit2/signal/signal_rate.py	100.00% <ø> (ø)
neurokit2/data/read_bitalino.py	15.09% <4.76%> (+6.25%)	⬆️
neurokit2/video/video_skin.py	5.00% <5.00%> (ø)
neurokit2/video/video_plot.py	11.90% <11.90%> (ø)
neurokit2/misc/progress_bar.py	14.28% <14.28%> (ø)
neurokit2/video/video_ppg.py	16.66% <16.66%> (ø)
neurokit2/video/video_face.py	17.24% <17.24%> (ø)
neurokit2/data/read_video.py	16.66% <50.00%> (+4.16%)	⬆️
... and 4 more

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[DominiqueMakowski]

Verdict: it doesn't work 😢

https://github.com/DominiqueMakowski/RemotePhysiology

[DominiqueMakowski]

I think I'll merge this, as it doesn't add too much maintenance burden. I marked all the functions docstrings as highly exploratory + added the link to the test and mentioned that rPPG probably doesn't work as of yet.

Hopefully, it will serve as a basis for future improvements!