* CVTracker: Handle API changes in OpenCV
The former cv::Tracker API we've been using is now cv::legacy::Tracker,
starting in OpenCV 4.5.1.
* CVTracker: Move some includes, add std:: prefixes
* Move ClipProcessingJobs into openshot NS
* OpenCV 4.5.1 message and auto-disabling
* Add fstream includes, explicit std:: namespace
Work around a MacOS bug where bare fstream resolves to the wrong class.
Co-authored-by: Brenno <brenno.caldato@gmail.com>
Co-authored-by: Brenno A. C. Caldato <BrennoCaldato@users.noreply.github.com>
