Is it possible to make an MP4 file without video using FFmpeg?
I want to remove the video part of an mp4 and only retain the audio but I don't want to convert it to m4a or mp3 or ogg.
I want it to remain as mp4, is this possible using Ffmpeg? And if so, how?
I know that I can get extract just the video (without the audio) into another MP4 but here I want to do the opposite, I want to strip out the video while retaining only the audio.
Use negative mapping to disable a stream (notice a dash in the video stream map option):
ffmpeg -i file.mp4 -map 0 -map -0:v -c:a copy audio.mp4
Read further in the Map descrption.