[FFmpeg-devel] [PATCH] avfilter: Handle =help to show Filter options documentation

[Clément Bœsch]

On Sat, Mar 30, 2013 at 02:47:48AM +0100, Michael Niedermayer wrote:
[...]
> > But why the user should know that -vf filter=help will show help,
> > instead of setting the arguments for the filter as it could be
> > reasonably expected?
> 
> its what the user actually tried who asked for it IIRC, its what i
> would try probably
> its what some other applications support
> try qemu for a list of cpus its
> -cpu '?'
> or
> mplayer -vo help
> 

OTOH the first users reflex with an unknown app is to run ./app -h or
./app --help.

-- 
Clément B.
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