FFMPEG Command: Add MP3 Audio file delayed in MP4 video file
# ffmpeg.exe -i “fox-story.mp4” -itsoffset 5.00 -i “fox-story.mp3” -map 0:v -map 1:a -vcodec copy -acodec copy “The Fox and Crow Story.mp4”
Input: fox-story.mp4 and fox-story.mp3
Output: The Fox and Crow Story.mp4
-itsoffset 5.00 -i “movie.mp3”
Offsets timestamps of audio streams by 5.00 seconds
-map 1:v -map 0:a
Takes audio stream from the second (delayed) input and video stream from the first input