[FFmpeg-devel] [PATCH 1/1] libavfilter/volume: do fade when adjusting the volume.

[Marton Balint]

On Thu, 24 Apr 2025, Gyan Doshi wrote:

>
>
> On 2025-04-24 02:05 am, Marton Balint wrote:
>> 
>>
>>  On Wed, 23 Apr 2025, cenzhanquan2 at gmail.com wrote:
>>
>>>  From: zhanquan cen <cenzhanquan2 at gmail.com>
>>>
>>>  1. add simple fade when volume.
>>>  2. do fade when adjust volume to maximal.
>>>
>>>  when to adjust volume we hope that the audio sample is smooth
>>>  we need to calculate the gradient step between each sample based
>>>  on the total change of the gradient (i.e. dst_volume - src_volume)
>>>  and the number of samples (nb_samples) and apply it to the target sample.
>>
>>  I don't understand this. Why would you want any fading when you want to
>>  apply the audio gain uniformly over the whole duration of audio?
> It is useful to transition into the new volume level.

The afade filter (or combining volume with afade) can already support such 
a use case, no?

Regards,
Marton


> However, this shouldn't be hardcoded. Add an option for the transition time 
> with default value of 0.
>
> Regards,
> Gyan
>
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