[FFmpeg-devel] [PATCH] avfilter: add skipblend filter

[Matthias Troffaes]

Dear FFmpeg developers,

... is there a possibility for this patch to get applied? Obviously
I'm happy to work further on the code where need be to get this
upstreamed.

Kind regards,
Matthias
On Wed, Oct 24, 2018 at 11:14 AM Matthias Troffaes
<matthias.troffaes at gmail.com> wrote:
>
> Attached a patch which adds a "skipblend" filter, which I've been
> using for a while. My hope is that an ffmpeg developer here can merge
> it. The filter is similar to the framestep filter, but additionally
> blends frames together at each step, for a motion blur effect. The
> number of frames that are blended (i.e. the exposure time, in frames)
> can be set, allowing control over the strength of the motion blur. The
> filter has timeline support, and supports both 8-bit and 16-bit pixel
> formats. Tests and documentation included.
>
> The main use so far that I (and others) have for this filter is to
> blend down high framerate footage, generated through computer
> rendering, to produce a high quality motion blur effect.
>
> Note that a similar effect is already possible by repeatedly chaining
> the tblend and framestep=step=2 filters; see for example:
>
> https://video.stackexchange.com/questions/16552/4x-resample-videoframes-using-ffmpeg
>
> But this is limited to steps that are powers of two, and this does not
> allow an intermediate exposure time. It's also slower.
>
> In the documentation, I've also added links between framestep, tblend,
> and the new skipblend filter, to help users to find the right filter
> they are looking for.
>
> Kind regards,
> Matthias