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

[Paul B Mahol]

On 5/12/19, Marton Balint <cus at passwd.hu> wrote:
>
>
> On Sun, 12 May 2019, Paul B Mahol wrote:
>
>> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>> ---
>>
>> This filter can dynamically change both tempo and pitch of audio.
>> Also scale range is bigger, from 0.01 to 100.
>
> Why would you want to do pitch scaling and tempo scaling in a single
> filter? Pitch scaling is a combo of asetrate and aresample as far as I
> understand. Tempo scaling is what atempo/librubberband/scaletempo does.
>
> I have no use case in my head where doing both makes too much sense. Do
> you?

Than rubberband/scaletempo does not make much sense as they also allow changing
pitch and tempo at same time.