Video processing source code for algorithms and tools used in software media pipelines. The currently available source code is written in C++ with their associated libraries and DirectShow Filters. Filters include an H.264 encoder, H.264 decoder, H.264 source filter, RTSP sink and source filters, YUV source, RGB to YUV color conversion, croppers, scalers, video mixing/picture in picture filters, rotate filter, virtual mic, and many more. Code is released under BSD license with exception of H.264 codec related classes which are released under LGPL.
Tinger Mask is a free and open source software that can cover a region on the screen. Especially, it can cover the subtitles, which is the best way to learn a second language. It can run on any kinds of platform, like windows, linux, MAC OS, etc.