Downloading QCTools 1.4 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free Mac application is MediaArea. The program lies within Audio & Video Tools, more precisely Editors & Converters.
From the developer:
QCTools (Quality Control Tools for Video Preservation) is a software application that helps users analyze and understand their digitized video files through use of audiovisual analytics and filtering. QCTools offers a variety of graphing features including YUV values, temporal outliers (TOUT), vertical line repetitions (VREP), broadcast range (BRNG), crop width and height (CropW and CropH), peak signal to noise ratio (PSNRf), etc.
You may want to check out more Mac applications, such as ImTOO iPhone Video Converter, ImTOO DVD to iPhone Converter or ImTOO MP4 Converter, which might be related to QCTools.