![]() ![]() The astats filter compiles statistics on audio data for small units of time, including maximum and minimum audio levels, DC Offset, the amount of consecutive audio sample differences, and RMS data. It is similar to PSNR but usually a different visual comparison algorithm. The resulting data documents how different the fields are (which can find head-clogs or other videotape playback errors). The SSIM filter is used in QCTools specifically to generate a comparison between the two fields of the frame. The PSNR filter is used in QCTools specifically to generate a comparison between the two fields of the frame. The filter can detect changes in framing, letterboxing, pillarboxing, and adjustments to the aperture of the image. The cropdetect filter is used to determine how many columns and rows of nearly-black pixels border the visual image of the frame. It is highly recommended to enable this filter. The signalstats analysis filter generates data to plot statistics on video signal levels, frame-to-frame differences, saturation and hue averages, and quantifications of visual patterns and errors. The “Filters” tab allows filters to be enabled or disabled. QCTool’s analysis methods depend on filters from FFmpeg’s libavfilter library. QCTools provides a Preferences window to configure settings for running QCTools. We encourage any issues, bugs, or ideas for QCTools to be submitted via our issue tracker. New releases of QCTools will be periodically available at BAVC. Visit or QCTools on Github and download QCTools for your operating system (currently Windows, Mac OS X, and many Linux-based operating systems are supported). View the Project on GitHub bavc/qctools How to Use QCTools is funded by the National Endowment for the Humanities and the Knight Foundation, and is developed by the Bay Area Video Coalition. QCTools (Quality Control Tools for Video Preservation) is a free and open source software tool that helps users analyze and understand their digitized video files through use of audiovisual analytics and filtering. ![]()
0 Comments
Leave a Reply. |