[FFmpeg-devel] [DECISION] scaletempo filter

Paul B Mahol onemda at gmail.com
Thu May 9 13:56:12 EEST 2019


On 5/9/19, Nicolas George <george at nsup.org> wrote:
> Paul B Mahol (12019-05-09):
>> I got into possession of code that is better than atempo for very
>> small scale factors (0.5).
>>
>> So I gonna write new filter which would also be able to change both
>> tempo and pitch at same time.
>
> My requirements stay the same:
>
> If it does the same thing, then it belongs in atempo, not in a separate
> new filter.
>
> This is a generic principle: if they do the same thing, from the users'
> perspective of the result and not from the developer perspective of the
> implementation, then they should have the same interface, and the users
> should get the best choice by default as much as possible.
>
> This is not an isolated problem, and this is not a whim from me: we had
> a discussion during the last VDD about the proliferation of scaling
> filters, and there was agreement that it was not a good direction for
> users. We also have a dozen de-interlacing filters and another dozen of
> de-noising filters. We cannot go back in time to prevent that
> proliferation, but we can prevent it from spreading farther, do
> resamplers and other kind of filters.

There can not be one ultimate denoising filter.

Your reasoning is illogical.


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