boost::optional<double> fade (boost::shared_ptr<const Film> film, Frame) const;
- void scale_and_crop_to_fit_width (boost::shared_ptr<const Film> film);
- void scale_and_crop_to_fit_height (boost::shared_ptr<const Film> film);
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std::string processing_description (boost::shared_ptr<const Film> film) const;
void set_length (Frame);