$ ffmpeg -i input_audio.mp3 -ab 128 output_audio.mp3 9) How to Increase/Decrease Audio Volume. You can easily manage the audio file volume using the “volume filter” option. FFmpeg uses “1” as the original volume of the file. To decrease the volume by half, use the following format: $ ffmpeg -i input_audio.mp3 -af 'volume=0.5' output
I have an audio file with 256 bit rate and sampling rate - 8000Hz. I would just like to reduce the bit rate to 128/64 kbs. I tried converting to mp3 and back to wav, ffmpeg -i input.wav 1.mp3 ffmpeg -i "1.mp3" -acodec pcm_s16le -ar 4000 out.wav but this reduced sampling rate as well.
Assuming you're trying to convert the output into MP3, you need something that can handle transcoding the audio. There are a number of tools available, but my personal preference is FFmpeg . It's a command line tool so you will need to take that into account, but otherwise it's very easy to use.
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convert wav to mp3 ffmpeg
