Multiple fadeIn/fadeOut effects in one audio file with ffmpeg

Question

I have some problem to add several fade effects to one audio file. When I try to use a command like this:

ffmpeg -y -i /home/user/video/test/sound.mp3 -af \"afad         


        

Answer 1

take a look here: ffmpeg volume filters

volume='if(lt(t,10),1,max(1-(t-10)/5,0))':eval=frame

complete command:

ffmpeg -i movie.wav -filter volume='if(lt(t,10),1,max(1-(t-10)/5,0))':eval=frame modified-movie.wav