Ffmpeg-quality-metrics

* Improve warnings and messages, add -r parameter.

* Merge pull request 14 from BassThatHertz/master.

Prevent users on Windows from seeing an "UnboundLocalError"

* Add sys.exit(1) to prevent users on Windows from seeing "UnboundLocalError: local variable 'model_path' referenced before assignment"

* Set PTS and framerate for input files.

* Apply black formatting.

* Add global statistics, fixes 13.

* Apply windows path modifications to VMAF model.

* Update Dockerfile Homebrew tag.

* Update README.

* Show error if using Windows and VMAF, fixes 10.

* Update test values, add almost equal comparison.

* Remove unused import.

* Remove unused import.