[FFmpeg-devel] [PATCH 2/5] fftools/cmdutils: Print filter input/output formats in help output

[Soft Works]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Paul B Mahol
> Sent: Wednesday, October 13, 2021 9:27 AM
> To: FFmpeg development discussions and patches <ffmpeg-
> devel at ffmpeg.org>
> Subject: Re: [FFmpeg-devel] [PATCH 2/5] fftools/cmdutils: Print
> filter input/output formats in help output
> 
> scale, extractplanes, alphaextract, waveform, vectorscope.

See the results below. Nothing is flawed. Of course there can't be an
output in all cases, as you have pointed out correctly.

But for the remaining 95% of filters, the formats output is very useful.
(and correct)


Filter extractplanes
  Extract planes as grayscale frames.
    Inputs:
       #0: default (video)
    Outputs:
        dynamic (depending on the options)
extractplanes AVOptions:


Filter alphaextract
  Extract an alpha channel as a grayscale image component.
    Inputs:
       #0: default (video)
    Outputs:
        dynamic (depending on the options)


Filter waveform
  Video waveform monitor.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
waveform AVOptions:


Filter vectorscope
  Video vectorscope.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
vectorscope AVOptions: