[FFmpeg-devel] Confusion over temporal filters.

[wm4]

On Sun, 10 Sep 2017 07:51:55 -0400
"Ronald S. Bultje" <rsbultje at gmail.com> wrote:

> Hi Richard,
> 
> On Sun, Sep 10, 2017 at 6:23 AM, Richard Ling <divetec at rling.com> wrote:
> 
> > But maybe some time, the filter API could be
> > updated so that after a seek, a filter can request frames that are before
> > the seek position.  
> 
> 
> All of this suggests an fast and easy frame-accurate seeking, which is
> usually not the case.
> 
> Imagine you're seeking to frame 100, but there's only keyframes (or
> otherwise: random access points) in frame 95 and 105. You can't seek to
> frame 100 (or 99) anyway.

An easy way would be having the filters export how many reference
frames it wants, instead of making all filters generic black boxes that
can't be reasoned about.