[FFmpeg-user] no such filter
barsnick at gmx.net
Fri May 22 11:16:35 CEST 2015
On Fri, May 22, 2015 at 10:52:10 +0200, lorenzo angeli wrote:
> This doesn't work:
> -filter_complex "[0:v][clip];[1:v][slate];[slate][clip] concat=n=2:v=1,
> scale=1920:1080, fps=25.0[v]"
> in the first case (the one which doesn't work), shouldn't be sort of
> renaming the input ?
Who says it should? If that syntax is not defined (and documented), it
As you noticed, you can help yourself with a filter which does nothing.
For video, "null" comes to mind, for audio "anull":
Your "scale" may alright, but I would probably choose
"scale=w=iw:h=ih", as not to risk "scale" doing anything. (Scale can
also do other stuff, so I would rather not use it to do "nothing".)
> The streams in and out are (or at least I think are) correctly
Sure, but that's not how it's defined. Two  next to each other
could be two inputs or two outputs as well.
> here the complete output with debug informations.
What was the problem with attaching 11 kB here?
> Hope it does make sense.
Little. You could open a feature request on trac.
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