Development of polysubtitles video player for multilingual technical support of digital substations equipment

The paper describes the formal model of the information video blocks submitting and synchronization. Also, the article describes the technology of multi-language video content support implemented in polysubtitles video player format based on that model. The essence of this technology consists of displaying multiple subtitle streams in different languages. This approach allows us to provide detailed technical information to the staff that is servicing the digital substation (and other complex objects) and speaking different languages. The technology development of the player is based on the UML diagrams using. The functionality of this software allows playing video files of various formats with parallel display of multiple subtitle streams in a single window. There is a possibility of video playback in multiple windows with different subtitles and centralized management and fast search and switching of video blocks. During the development of this software there were reviewed multiple formats video files and subtitle files. The .mkv fail was parsed during the coding in C#, on the Windows Presentation Foundation platform. The information inside this container became available for playback and setting up. The result of the application of this technology is the simultaneous display of multiple subtitle streams in different languages. During the development of this desktop application the authors also designed an easy intuitive user-friendly interface. The design elements are standard Windows Presentation Foundation applications.