![]() ![]() You will need to specify the dosage field by "-field" option when running EPACTS.ĬAVEAT: Processing huge files can consume considerable amounts of disk space (temporary files!) and memory.The AddVcfDosage script does this final step. To allow EPACTS make use of the genotype dosages, a dosage field (default DS) need to be added to the VCF file based on genotype call probabilities (default GP).You need to pay attention to file sorting (by variant position) - script provided.It might be necessary to set the correct chromosome number in the VCF file.QCtool helps with Impute2 genotypes (*.impute2/*.gen) to VCF conversion.See our License page for more details.The workflow and scripts below help with the following steps to convert IMPUTE2 *.gen files into *.vcf files that contain the dosage of the alternate allele in a single field (needed by EPACTS to use dosages for association): This software uses libraries from the FFmpeg project under the GPLv3, Qt and Qwt libraries under the LGPLv2.1, OpenJPEG library under the 2-Clause BSD license. QCTools GUI part and FFmpeg statistics filter are licensed under the 3-Clause BSD license. QCTools deliverable is licensed under a GPLv3 License. Users are invited to contribute unidentified errors they come across to the atlas. In conjunction with using QCTools, consider using the A/V Artifacts Atlas to gain further clarification and appropriate descriptive terminology for any anomalies or errors you might encounter in your video content. Incorporating a set of open source libraries developed under the ffmpeg project, the QCTools document offers metadata values derived from four evaluative filters: signalstats, cropdetect, psnr, and ebur128. The QCTools document (built upon FFprobe's xml expression), is designed to be self-descriptive, storing analytical metadata about video and audio frames. The playback window includes two viewing windows which may be set to different combinations of filters. The QCTools preview window is intended as an analytical playback environent that allows the user to review video through multiple filters simultaneously. QCTools offers a variety of Graphing Options including: YUV Values, Temporal Outliers (TOUT), Vertical Line Repetitions (VREP), Broadcast Range (BRNG), Crop Width and Height (CropW and CropH), and Peak Signal to Noise Ratio (PSNRf) and Mean Square Error (MSEf) differences per frame. ![]() By relying upon ffmpeg's libavcodec and libformat libraries, QCTools can support a wide variety of digital audiovisual formats. New releases of QCTools will be periodically available at the QCTools Project website.Ĭurrently QCTools accepts a variety of video formats, including *.avi, *.mkv, *.mov, and *.mp4, as well as a diverse selection of codecs. Initiate the install by double-clicking the icon, and follow the steps. ![]() Go to or Releases and download QCTools for your operating system. gz files, formatted according to the ffprobe xml standard).įor more information about the project, or to download the latest Mac/Winddows/Ubuntu release, please visit BAVC's QCTools homepage.Īn overview of QCTools and how to use it can be found here. The tool is flexible, providing a variety of viewing options, as well the ability to create and export reports (gzip, or. QCTools allows archivists, curators, preservationists and other moving image professionals to identify, filter, and assess all manner of video errors and anomalies. Our (in progress) wiki is starting to develop here. QCTools is funded by the National Endowment for the Humanities and the Knight Foundation, and 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. It is built on FFmpeg's filtering tools.Ī related resource is the AV Artifact Atlas. QCTools analyzes digitized analog video files and detects corruption. ![]()
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