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How to Replace & Remove Video Original Audio with New Audio & Loop It with FFMPEG in Terminal
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Jun 3, 2025
Command Used in the video: ffmpeg -i video.mp4 -stream__loop -1 -i audio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4
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0:00
uh hello guys uh welcome to this video
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So in this video I will show you how to
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remove the audio from your video and
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replace it with a new
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audio and we will loop through if the
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audio length is shorter than the video
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So this is a very complex fmpp command
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but it's very easy to learn So it will
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basically do a lot of good things So we
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have a simple video file Let me play it
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So this is welcome variable created can
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see you can see it's a original video
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right here with my original voice here
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So what I command
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f what this ffmpg command will do it
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will remove this audio from this video
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mpg
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just first of all it will remove this
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audio and it will replace this with this
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beep sound you will
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see So it's a 1second beep sound MP3
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file If you see we have this beep in the
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same directory and we will first of all
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remove this audio and then replace this
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inside entirety with this beep sound So
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just open command line in the directory
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where all these assets are present and
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simply type here f ofmppg and then dash
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i to provide the input file name So
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input file name is 2.mpp4
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MP34 So after that we simply say dash
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stream and dash
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stream
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underscore So here we just need to write
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underscore loop
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dash loop and then dash
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1 and dash dash i And here we need to
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loop through this uh new audio If you
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see this is the name of the audio file
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So we simply say beep do
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mp3 and after that we just need to map
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to the entire video So we use this map
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filter dash map after that zero colon
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v So this is after that we simply write
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dash map 1 dot 1 a So just pause the
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video and just write whatever whatever
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I'm writing right here underscore a
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after that we need to simply copy the
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encoding settings For doing that we
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simply say dash c colon v So this will
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copy the encoding settings and here we
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simply write copy and dash
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shortest So it will take short amount of
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time and then the output file name So
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we'll say replaced dot
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mp4 So what this is command is doing
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guys we providing the input file then we
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are removing the original audio and
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replacing it with this new audio and we
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are looping through and we are copying
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the encoding settings and then this is
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your output file name So if I press the
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enter key and you will see it will
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process this uh input video file and it
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will create a new video file right here
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and if I try to open this you will see
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the audio is
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removed So you can as you can see the
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audio which was there in this video is
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completely removed and it has been
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replaced by a new audio This can be any
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music file as well You can replace it
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with any music which will appear for
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copyright issues I'm not I'm just using
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this beep sound So you can just have any
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MP3 file You can replace it with any new
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uh MP3 file that you
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recorded So this I've given this command
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in the description of this video So
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just execute this and it will do this it
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will remove the original audio and
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replace it by with uh whatever MP3 file
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that you want to use to the entirety of
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the video So this was a tutorial in fmpp
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which will save you a lot of time
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because uh many a times you want to
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replace audio inside your video for some
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reason So this command will in that
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situation will be very useful So I've
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given this command in the description of
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this video and also check out my website
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freemediatools.com
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uh which contains thousands of tools
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regarding audio video and image
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