![]() ![]() Content marked as full range may appropriately exceed these limits. Note: that these lines are only applicable to content that is decoded as broadcast range. The U and V graphs have similar lines at 16 and 240 to show the broadcast range limits of the chroma planes. Similarly values plotted from 0-16 would all be clipped and portrayed as black. All values plotted above the red dash-dot line should be decoded as white with all visual distinction in the values from 235-255 clipped to the same maximum value of white. Using an 8-bit video file as an example, in the Y graph there is a red dash-dot line at 235 (the equivalent of 100 IRE) to show broadcast white and a blue dash-dot line is at 16 (the equivalent of 7.5 IRE) to show broadcast black. These filters examine every pixel in a given channel and record the Maximum, Minimum, and Average values.Įach plot shows a dot-dash line to show the limits of broadcast range. QCTools analyzes the YUV Values of a particular encoded video file in order to provide information about the appearance of the video. YUV refers to a particular a way of encoding color information in analog video where Y channels carry luma (or brightness information, and U and V channels carry information about color (or chroma). ![]() Interlacement Detection (repeated fields) Interlacement Detection (multiple frames) ![]() View the Project on GitHub bavc/qctools Filter Descriptions Video 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. ![]()
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