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====== Ubuntu - Sound - Convert WAV to MP3 ======

===== Using ffmpeg =====

<code bash>
ffmpeg -i "song.wav" -ab 320k "song.mp3"
</code>

Batch:

<code bash>
for i in *.wav; do ffmpeg -i "$i" -ab 320k "${i%.*}.mp3"; done
</code>

<code bash>
for i in *.wav; do ffmpeg -i "$i" -f mp3 "${i%}.mp3"; done
</code>

Mono to stereo conversion:

<code bash>
ffmpeg -i test.wav -af "pan=stereo|c0=c0|c1=c0" out.wav
</code>


Strip Video:

<code bash>
ffmpeg -i input.wav -vn -ar 44100 -ac 2 -b:a 192k output.mp3
</code>

  *-i - input file
  * -vn - Disable video, to make sure no video (including album cover image) is included if the source would be a video file
  * -ar - Set the audio sampling frequency. For output streams it is set by default to the frequency of the corresponding input stream. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is mapped to the corresponding demuxer options.
  * -ac - Set the number of audio channels. For output streams it is set by default to the number of input audio channels. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is mapped to the corresponding demuxer options. So used here to make sure it is stereo (2 channels)
  * -b:a - Converts the audio bitrate to be exact 192kbit per second

----

===== Using Lame =====

High quality

<code bash>
lame -h song.wav song.mp3
</code>

Fixed 128kbs stereo encoding

<code bash>
lame song.wav song.mp3
</code>

Fast and low quality

<code bash>
lame -f song.wav song.mp3
</code>

Encode at a bit rate of 112 kbs

<code bash>
lame -b 112 song.wav song.mp3
</code>

----
              
===== Using Bladeenc =====

<code bash>
bladeenc song.wav song.mp3
</code>


<WRAP notice>
**NOTE:**  The size of the MP3 file will be approximately 10% the size of the WAV file.
</WRAP>