How to convert any mp3 file to .wav 16khz mono 16bit

mp3sample-ratewav

Please, help to choose solution for converting any mp3 file to special .wav – I'm a newbie with Linux command line tools, so It's hard for me right now.

I need to get wav with 16khz mono 16bit sound properties from any mp3 file. I was trying

ffmpeg -i 111.mp3 -ab 16k out.wav,

but I got wav with the same rate as mp3 (22k).

Please, help to construct right command line

Best Answer

kdazzle's solution is almost there - it still output a stereo wav, here is a slightly modified version that generate mono:

ffmpeg -i 111.mp3 -acodec pcm_s16le -ac 1 -ar 16000 out.wav

also, if this is for pre-processing speech data for sphinx 4 see here: Convert audio files for CMU Sphinx 4 input

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Crop MP3 to first 30 seconds

I also recommend ffmpeg, but the command line suggested by John Boker has an unintended side effect: it re-encodes the file to the default bitrate (which is 64 kb/s in the version I have here at least). This might give your customers a false impression of the quality of your sound files, and it also takes longer to do.

Here's a command line that will slice to 30 seconds without transcoding:

ffmpeg -t 30 -i inputfile.mp3 -acodec copy outputfile.mp3

The -acodec switch tells ffmpeg to use the special "copy" codec which does not transcode. It is lightning fast.

NOTE: the command was updated based on comment from Oben Sonne

Best Answer

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Crop MP3 to first 30 seconds

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