[FFmpeg-user] [mp2] how to encode high-pitch audio to mp2 file?

Maziar Mehrabi maziar.mehrabi at gmail.com
Thu Sep 25 12:22:32 CEST 2014


MP2 is a lossy compression format. Meaning that the data is compressed
through losing and filtering some less valuable data.


Maziar Mehrabi,

On Thu, Sep 25, 2014 at 12:42 PM, linxs <linxsy at gmail.com> wrote:

> An audio file, whoes param is: 48k, 2 channel, 16bit.
> The audio is sine wave and only has one frequecy: 19500Hz.
> I use the this command:
> ffmpeg -i 195khz.wav -b:a 384k -c:a mp2 195.mp2
> then,
> ffmpeg -i 195.mp2 195-re.wav
> The problem is: the high-pitch sine wave from original audio is eliminated
> completely
> and all data in 195-re.wav is 0 !
> How can I use mp2 to encode high pitch audio?
> Thank you!
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