Recording of Time Varying Data on a Display Device: An Embedded Solution

This paper presents the design method for developing a recording application for time varying data displayed on the monitor based on embedded Linux using Qt, a powerful development toolkit. Recording of the visualization of time varying data to video is perceived to be a convenient and easy-to-use solution for the intense data analysis anywhere/anytime. The application is based on IBM´s PowerPC 7410, while the software platform is Embedded Linux and the development environment features are Qt and Qt/Embedded. The embedded operating system is MontaVista Linux with X11 built as an abstract layer on kernel providing graphics capability to the system. The open source FFmpeg library is employed to encode captured window frames to mpeg video. The experimental testing and results indicated that this system is working stably and reliably. The implementation of the entire design environment is based on the X Window System and the Linux operating system and can thus be used on an increasing number of low-cost workstations.