Added ability to override video frame rate (fixes #287)

[vania-pooh]

No description provided.

[codecov-io]

Codecov Report

Merging #290 into master will increase coverage by 0.37%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #290      +/-   ##
==========================================
+ Coverage   71.66%   72.04%   +0.37%     
==========================================
  Files           8        8              
  Lines        1094     1098       +4     
==========================================
+ Hits          784      791       +7     
+ Misses        263      261       -2     
+ Partials       47       46       -1

Flag	Coverage Δ
#unittests	72.04% <100%> (+0.37%)	⬆️

Impacted Files	Coverage Δ
session/session.go	100% <ø> (ø)	⬆️
service/docker.go	76.26% <100%> (+1.56%)	⬆️

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