[FFmpeg-user] speeding up filter complex

[Carl Eugen Hoyos]

Bouke (VideoToolShed <bouke <at> videotoolshed.com> writes:

> > What about the speed if you don't overlay but only scale
> > the input streams (and decode three of them with -f null)?
> 
> Eeh, now i'm lost....
> How would this get me a quad display? 

It would not.

> Or, do you mean just to do a speedtest?

Yes, I expected that scale is slower than overlay 
(but was apparently wrong).
Implementing multi-threading for the scale filter may 
be easier because libswscale already supports slices.

Carl Eugen