(1) I read "compiling ffmpeg" as "compiling
ffmpeg executable with gcc or something". You mean "compiling a video with ffmpeg", right? (2) This answer does not really answer the question. The question is "What hotkeys can I use to return FFmpeg to normal mode?". Not all hotkeys in the answer return ffmpeg to normal mode, so the answer is just a hint, something like "read this list, the real answer is there somewhere among many other things", in principle not so different than RTFM.