Ubuntu Basics FFMPEG flip video filters
Use FFMPEG in the terminal to post-process a video. You can save a text file in Gedit text editor and "run" it so long as you put a check mark in "Properties/Permissions/Execute". (Right click the file name to get to Properties.) FFMPEG's syntax requires that you list -i (input file), then -vf (video filters), then the Output File. The video filters are "vlip", "hflip" (or "vflip,hflip" for both), "transpose=0", "transpose=1", "transpose=2", and "transpose=3". All of the video programs on Planet Earth make use of FFMPEG and usually they are all run in some kind of GUI.