Boosting Audio Volume
AS
Aman Saurav
5 min read
#audio
#volume
Sometimes a video recording is too quiet. accurate adjustments can be made using the volume audio filter.
Increasing Volume by 50%
To increase volume by 50% (making it 1.5x louder):
ffmpeg -i input.mp4 -filter:a "volume=1.5" output.mp4
Using Decibels
You can also specify the gain in decibels (dB):
ffmpeg -i input.mp4 -filter:a "volume=5dB" output.mp4
Warning
Increasing volume too much can cause “clipping” (distortion). It is often safer to simplify normalize the audio rather than blindly boosting it.
Audio Normalization
To maximize volume without clipping:
ffmpeg -i input.mp4 -filter:a loudnorm output.mp4