FFSPLIT

FFsplit is a lightweight utility that lets you capture videos from multiple sources and composite them into a live video feed. The feed can then be livestreamed and/or recorded locally using FFmpeg, or used as a webcam source using a DirectShow filter. FFsplit is designed to let you easily create more professional and unique content as fast as possible. FFsplit is highly optimized to give you the best performance so you can focus more on what's important.