[FFmpeg-user] command -h error

juan carlos Rebate nerus492 at gmail.com
Sun Jun 5 00:47:33 CEST 2016


no no no ffmpeg -h format mpeg unknown

2016-06-05 0:38 GMT+02:00 Moritz Barsnick <barsnick at gmx.net>:

> On Sun, Jun 05, 2016 at 00:24:11 +0200, Reindl Harald wrote:
> > Am 05.06.2016 um 00:14 schrieb juan carlos Rebate:
> > > help on your commands,when I try to ask for help console command
> always she
> > > tells me unknown, for example ffmpeg -h format mpeg or ffmpeg -h
> format=mpeg
>
> You (juan) misread the description.
>
> > "ffmpeg -h format mpeg" WHERE do you see that mentioned?
>
> It's similarly described. ;-) See below.
>
> > "ffmpeg -formats" is aas example valid according to the output below
>
> You forgot to quote the interesting part:
>
> Getting help:
>     -h      -- print basic options
>     -h long -- print more options
>     -h full -- print all options (including all format and codec specific
> options, very long)
>     -h type=name -- print all options for the named
> decoder/encoder/demuxer/muxer/filter
>
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> I agree it's confusing that ffmpeg sometimes insists on calling it a
> format, sometimes a device, sometimes muxer/demuxer. In this particular
> case, the exact names mentioned in the help apply, so you (juan) are
> looking for:
>
> $ ffmpeg -h muxer=mpeg
> or
> $ ffmpeg -h demuxer=mpeg
> (They're different because they have different options.)
>
> Note that you will only see the special options applicable to that
> particular de/muxer.
>
> $ ffmpeg -h full
> should show all decoders/encoders/demuxers/muxers/filters, you could
> search in the outputs.
>
> Moritz
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