I often vondered how those multiple live videos in moving wall videos were made ... I thought they were done on VERY fast specialized machine. Well, apparently machines were fast and soecialized, but not THAT fast. http://positivelyatlantaga.com/1990/01/07/video-stratigraphy-working-with-mu... If I read this piece correctly engineers just ran video between two disks adding layer at a time. So, a lot more labor but still working effect in the end! I looked at compubench 1.5 benchmark (win64, sorry for me) and while some modern cards can composite at 300 fps not so new cards easily can drop down 10x https://compubench.com/result.jsp?benchmark=compu15d&test=588&text-filter=&o... and sadly OpenCL in free drivers not advanced enough (I monitor progress there, sadly driver writers not very interested in writing application code too?), and writing FAST OpenCL code is not trivial ... I also noticed interesting difference between how TV was made 'unser time pressure' back in XX century, as opposed to 'graphics art' that was more about conceptualizing and less about painting itself. https://www.provideocoalition.com/growing-pains-the-desktop-video-identity-c... Cinelerra was born more as TV tool, and I guess this explains 'weird' one hit hotkeys.