I need some help with my own screen-recorder software.

We want to record the video with audio of the screen of the application for providing tutorial, training and other purposes. So we want to include a videos recording module to our wpf application which can capture screen or record the whole screen for any user in high quality. The video recording will have following functions, - Screen record (video only , video with audio, screen capture etc) - Screen to record or capture can be selected using a rectangular selection - Screen can be entire desktop, or only the WPF app (our app) or any window from our app (for example window can be identified by title or name etc) - Start and Stop recording, with pause resume if possible. - Show the time of the recording - High quality video (or options for different quality) with less size of the record video - Once stopped provide a popup with preview and an option to load in cloud at defined path. - FFmpeg is an option for example, if any commercial one well know and can be easily integrated with our WPF app is also welcome. - The module should be integrate with WPF app without putting any specific hardware restriction