VideoAnalysis
Non-realtime video analysis, exporting motiongrams and various quantitative features of movement in the video file.
Quick facts
- Download: OSX / Win / source
- Version: 0.5
- Date: 10.08.2009
- Author: Alexander Refsum Jensenius & Kristian Nymoen
- Developed: 2004-2011
- License: CC-GNU GPL
Demonstration
Download high-resolution QuickTime version of this movie.
Features
- Imports a folder of video files for batch processing
- Realtime previewing of video, motion image, motiongrams and analysis data
- Outputs horizontal and vertical motiongrams
- The output files are saved in the location of, and names based on, the original video file.
- Outputs a text file with the following data:
- The first column contains a time stamp.
- Columns 2 through 10 contains filtered data
- Columns 11 through 19 contains unfiltered data
- Xposition
- Yposition
- Xvelocity
- Yvelocity
- absolute velocity
- direction
- absolute acceleration
- change in direction
- Quantity of Motion
- Please see the wiki page about how to use the exported data.
Screenshots
FAQ
Q: What are the numbers being exported?
A: Check this wiki page
Q: What type of video file should I use?
A: VideoAnalysis uses the QuickTime engine, so any video file that can open and play in QuickTime should also open and play in VideoAnalysis.
Q: What type of video compression should I use?
A: This depends on many factors. The best is to use uncompressed video, but this is usually not practically possible. Second best is to use a file format that compresses the video on a per frame basis, e.g. Motion JPEG (MJPEG). Other compression types, e.g. MPEG-1/2/4 use keyframes for compression. That said, we often use MPEG-4 (H.264) compression, since this gives a high visual quality and small file size.
Claudia Mauléon and Esteban Etcheverry have written a short overview of their experiences with working with VideoAnalysis on Windows.
Acknowledgments
- Built with Max/MSP/Jitter by Cycling '74.
Unit: UiO, webmaster@uio.no
Document created: 22.02.2010, modified: 16.03.2012Manage document