[FFmpeg-user] Extracting video levels on the command line

Robert Krüger krueger at lesspain.de
Tue Aug 4 12:22:04 CEST 2015

On Mon, Aug 3, 2015 at 10:49 PM, Paul B Mahol <onemda at gmail.com> wrote:

> Dana 3. 8. 2015. 22:28 osoba "Moritz Barsnick" <barsnick at gmx.net> napisala
> je:
> >
> > On Mon, Aug 03, 2015 at 21:55:59 +0200, Robert Krüger wrote:
> > > Is there any other way than looking at each frame's histogram (using
> the
> > > histogram filter) and counting pixels?
> >
> > It should probably be easy to write such a filter.
> >
> > Have you looked at signalstats? It does seem to have the capability to
> > identify various statistics on the Y, U, V planes, but reports them
> > only in metadata, not in console output (IIUC).
> >
> ffprobe can output any metadata

Thanks. I overlooked signalstats. It does not give me quite what I want,
because it's per frame but it is a lot better than abusing the histogram
filter for that. No idea if this makes sense but maybe this total min/max
thing could even be implemented generically in ffprobe for any
number-valued metadata but that's just an idea.

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