[FFmpeg-devel] avfilter/adelay - interactive commands

[deiwo deiwo]

Similar to how one can change volume in the volume filter when there is a
zeromq filter preceding the volume filter, then it's possible to send
zeromq commands to the volume filter and change the volume dynamically
(while the ffmpeg is running).
In the case of adelay filter the delay could be changed dynamically, when
the user would increase the delay, additional silence would be added and
the sample buffer would increase, and when the user would decrease the
delay some samples would be skipped in the sample buffer and the buffer
size would decrease.

The usage for this would be beneficial for live streams, for example when
changing the delay of an audio channel requires complete restart of the
ffmpeg.

ut 18. 1. 2022 o 9:22 Paul B Mahol <onemda at gmail.com> napísal(a):

> On Mon, Jan 17, 2022 at 11:02 PM deiwo deiwo <deiwo101 at gmail.com> wrote:
>
> > Hello,
> > I would like to ask if it makes sense to implement ZeroMQ interactive
> > commands for the adelay filter, from the performance and memory point of
> > view.
> > If it does make sense then is it possible to malloc/free/realloc memory
> > within the command processing function? Can it cause noticeable delays in
> > the stream outputs?
> >
> > I am new to the ffmpeg development so I am sorry if this kind of question
> > does not belong to this mailing list.
> >
> >
> I fail to see how that would work. Please elaborate your idea.
>
>
>
> > Thanks for the response,
> > David L
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