[FFmpeg-devel] Filters and addition/removal on the fly

[Paul B Mahol]

On 8/30/13, JULIAN GARDNER <joolzg at btinternet.com> wrote:
> I am trying to write a new filter that will when getting stimulus from an
> external source add/remove other filters from the filterchain on the fly?
>
> So my question is, are there any examples which would do this

No, as far as I know, there is no filter that changes filtergraph dynamically.

But there is timeline supported by some fitlers, but it may not be
what you are looking for.

>
> As an example
>
> ffmpeg -i src1 -i src2 -filter_complex '[0:v][1:v] overlay' -v:b 1300k
> overlay_test.ts
>
>
> but with external stimulus to become
>
> ffmpeg -i src1 -i src2 -filter_complex '[0:v][1:v] overlay,edgedetect' -v:b
> 1300k overlay_test.ts
>
>
> and then back again when needed to
>
> ffmpeg -i src1 -i src2 -filter_complex '[0:v][1:v] overlay' -v:b 1300k
> overlay_test.ts
>
>
> This will be a live source and the stimulus will be coming in over a tcp
> link
>
> joolz
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