XD...我用了這個指令ffmpeg.exe -i "movie.mp4" -itsoffset 3.84 -i "movie.mp4" -map 0:v -map 1:a -vcodec copy -acodec copy "movie-audio-delayed.mp4"這樣就行了google到的只是-itsoffset 跟-map的指令的意思不懂 >"<