[FFmpeg-user] Replace part of the audio

[Michael Koch]

Am 21.01.2023 um 17:05 schrieb Paul B Mahol:
> On 1/19/23, Michael Koch <astroelectronic at t-online.de> wrote:
>> Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user:
>>> How can I replace a part of the audio from and to a specific time with
>>> some
>>> other audio/sound (I want to replace it with beep in this case)?
>>>
>> Here is an example:
>>
>> ffmpeg -lavfi sine=500:d=10 -y audio1.wav
>> ffmpeg -lavfi sine=2000:d=10 -y audio2.wav
>>
>> ffmpeg -i audio1.wav -i audio2.wav -lavfi
>> [0]volume='1-between(t,4,6)':eval=frame[a];[1]volume='between(t,4,6)':eval=frame[b];[a][b]amix
>>
>> -y out.wav
> That is never going to give smooth transitions.
>
> Also overly complicated as can be simplified with commands to to amix filter.

If my example is too complicated, then please show a simpler example.

Michael