[FFmpeg-user] Levels and Primaries

[Rio Kierkels]

Yes if I prepend the histogram filter with format=rgb24 I get a nice red
green blue colored waveform, nice to know you can switch output styles.


On 4 February 2014 12:05, Paul B Mahol <onemda at gmail.com> wrote:

> On 2/4/14, Rio Kierkels <riokierkels at gmail.com> wrote:
> > Thanks Andy,
> >
> > If this is true it's good news for ffmpeg, bad news for the other apps
> and
> > our current delivery pipeline.
> > My next step would be to create a very basic mxf parser to determine the
> Y'
> > values but as I've said my C skills are sub par to my python skills.
> > Does anybody have some other nice tool to determine levels to cross check
> > this. Or maybe someone who can verify that the ffmpeg mxf parser and
> > mpeg2video decoder doesn't do anything to the levels when converting it
> to
> > a waveform?
>
> The only thing that could change waveform is colorspace change.
> It's not histogram filter job to play with colorspace stuff.
> You can see if swscale was used to do colorspace conversion with
> verbose ffmpeg output.
>
> >
> >
> > On 4 February 2014 01:04, Phil Rhodes <phil_rhodes at rocketmail.com>
> wrote:
> >
> >> > It just seemed a bit excessive to add them to the original post.
> >>
> >> It is.
> >>
> >> P
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> >
> >
> >
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> > 42
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