CODEWITHSUNDEEP
audioffmpegavconv
Redzarf
Redzarf

Reputation: 2699

insert audio into another audio file (eg a censor bleep)

I need to insert a short beep into another audio file (similar to a censorship bleep) using linux and/or php.

I'm thinking there should be some way to do it with ffmpeg (with some combination of -t, concat, map, async, adelay, itsoffset?) or avconv or mkvmerge - but haven't found anyone doing this. Maybe I need to do it in 2 stages somehow?

For example if I have a 60 second mp3 and want to beep out 2 seconds at 2 places the desired result would be:

0:00-0:15  from original
0:15-0:17  beep (overwrites the 2 secs of original)
0:17-0:40  from original
0:40-0:42  beep
0:42-0:60  from original

I have a 2 second beep.mp3, but can use something else instead like -i "sine=frequency=1000:duration=2"

Upvotes: 3

Views: 1524

Answers (2)

pushpika liyanaarachchi
pushpika liyanaarachchi

Reputation: 121

First, you need to have beep.mp3 time equal to 60 seconds or little bit less than your mp3 file time.

Then, you can use ffmpeg code -ss <start_time> -t <duration> -i <your_file>.mp3 

ffmpeg -ss 00:00:00 -t 15 -i ./original.mp3 -ss 00:15:00 -t 2 -i ./beep.mp3 -ss 00:17:00 -t 23 -i ./original.mp3 -ss 00:40:00 -t 2 -i ./beep.mp3 -ss 00:42:00 -i ./original.mp3 -filter_complex '[0:0][1:0] concat=n=2:v=0:a=1[out]' -map '[out]' ./output.mp3

at the end you will get output.mp3 file as you needed.

Upvotes: 1

Gyan
Gyan

Reputation: 92928

You can use the concat demuxer.

Create a text file, e.g.

file main.wav
inpoint 0
outpoint 15
file beep.wav
file main.wav
inpoint 17
outpoint 40
file beep.wav
file main.wav
inpoint 40
outpoint 42

and then

ffmpeg -f concat -i list.txt out.mp3

Convert the beep file to have the same sampling rate and channel count as the main audio.

Upvotes: 4

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