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Digitized analog video analysis
Platforms:Windows, Mac & Ubuntu
Function:Quality Assurance
Content type:Video


QCTools analyzes digitized analog video files and detects corruption. It is built on FFmpeg's filtering tools.

A related resource is the AV Artifact Atlas.

Quoted from the README.md: “

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. QCTools is funded by the National Endowment for the Humanities and the Knight Foundation, and developed by the Bay Area Video Coalition.

Our (in progress) wiki is starting to develop here.

general info[edit]

QCTools allows archivists, curators, preservationists and other moving image professionals to identify, filter, and assess all manner of video errors and anomalies. The tool is flexible, providing a variety of viewing options, as well the ability to create and export reports (gzip, or .gz files, formatted according to the ffprobe xml standard).

For more information about the project, or to download the latest Mac/Winddows/Ubuntu release, please visit BAVC's QCTools homepage.

An overview of QCTools and how to use it can be found here.


Go to http://bavc.org/qctools or Releases and download QCTools for your operating system. Initiate the install by double-clicking the icon, and follow the steps. New releases of QCTools will be periodically available at the QCTools Project website.

getting started[edit]

Currently QCTools accepts a variety of video formats, including *.avi, *.mkv, *.mov, and *.mp4, as well as a diverse selection of codecs. By relying upon ffmpeg's libavcodec and libformat libraries, QCTools can support a wide variety of digital audiovisual formats.

graph descriptions[edit]

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.

playback filters[edit]

The QCTools preview window is intended as an analytical playback environent that allows the user to review video through multiple filters simultaneously. The playback window includes two viewing windows which may be set to different combinations of filters.

reading a qctools document[edit]

The QCTools document (built upon FFprobe's xml expression), is designed to be self-descriptive, storing analytical metadata about video and audio frames.

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.

a/v artifact atlas[edit]

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. Users are invited to contribute unidentified errors they come across to the atlas.


QCTools deliverable is licensed under a GPLv3 License. QCTools GUI part and FFmpeg statistics filter are licensed under the 3-Clause BSD license. 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. See our License page for more details.


User Experiences[edit]

Development Activity[edit]

All development activity is visible on GitHub: http://github.com/bavc/qctools/commits

Release Feed[edit]

Below the last 3 release feeds:

2023-10-12 13:36:43
[tag:github.com,2008:Repository/11542067/v1.3.1 QCTools 1.3.1]
by dericed
2023-09-18 14:49:50
[tag:github.com,2008:Repository/11542067/v1.3 QCTools 1.3]
by dericed
2022-02-16 19:37:44
[tag:github.com,2008:Repository/11542067/v1.2.1 QCTools 1.2.1]
by dericed

Activity Feed[edit]

Below the last 5 commits: Failed to load RSS feed from https://github.com/bavc/qctools/commits/master.atom: There was a problem during the HTTP request: 404 Not Found