[Libav-user] AVFilter modify parameters

[Paul B Mahol]

On 11/26/17, Ronak <ronak2121-at-yahoo.com at ffmpeg.org> wrote:
> Hi,
>
> As I mentioned earlier, I'm trying to use the AVFilter libraries to build a
> graphical equalizer in an iOS app.
>
> The user will have the ability to manipulate the equalizer settings while
> audio is playing back. However, I don't see an API on AVFilter so I can
> manipulate the gain settings.
>
> Therefore, it feels like I would have to recreate an equalizer AVFilter and
> rebuild the graph.

Some filters have support for commands.

>
> Is that the recommended way to go about this?