See https://www.cockos.com/wdl/ https://www.cockos.com/wdl/ LICE - Lightweight Image Compositing Engine. WDL is a small cross platform library they have built

See https://www.cockos.com/wdl/ https://www.cockos.com/wdl/ LICE - Lightweight Image Compositing Engine. WDL is a small cross platform library they have built to support the development of REAPER afaik