[FFmpeg-devel] [PATCH] avfilter: add apitch filter

[Nicolas George]

Marton Balint (12019-05-12):
> Yeah, you are right, what I had in mind was this:
> 
> apitch  ===  asetrate,aresample,atempo

Exactly. And reciprocally, atempo = apitch+asetrate+aresample.

Furthermore, since it works with the spectrum, the filter that does the
hard work can probably easily output at any sample rate, at a cost much
lower than resampling afterwards. Therefore, it makes most sense to have
a single filter with all three parameters (sample rate, speed adjustment
and pitch adjustment).

Regards,

-- 
  Nicolas George
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