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I have some MP3s that are in 48000 Hz sampling frequency. I'd like to burn them to CD, so I have to reduce the sampling frequency into 441000.

How to do that using ffmpeg?

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ffmpeg doesn't look to be the appropriate tool; I'd normally use sox for audio-only files.

$ sox file1.mpg -r 44100 file1-enc.mpg

If you want to try using ffmpeg anyway, I think the correct command would be

$ ffmpeg -i file1.mpg -ar 44100 file1-enc.mpg
| improve this answer | |
  • Yes sox is much better for audio, thanks for the tip! – Michael Pliskin Jan 4 '12 at 11:17
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    ffmpeg supports sox resampler since 1.1 – Benja Apr 10 '14 at 15:04
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    sox didn't directly work with MP3s for me. I had to install libsox-fmt-mp3 – gsmafra Mar 21 '16 at 18:58
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    ffmpeg is a perfectly appropriate tool, though it may be overkill in a way. – leftaroundabout Aug 10 '18 at 15:44
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    And if you need constant bitrate (CBR), you can add something like -b:a 64k (trac.ffmpeg.org/wiki/Encode/MP3). – Ryan Feb 18 '19 at 15:41

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