[FFmpeg-user] Convert images to DNXHD 444

Wayne Poll WPoll at nhnz.tv
Wed Apr 11 23:49:01 EEST 2018

> There is also an image http://elmtreecottages.co.uk/Charts.jpg which
> shows a screen example of the difference. (ffmpeg on the left) The
> quicktime version is, to me, indistinguishable from the source tiff in
> terms of colour. The ffmpeg version is less saturated and a bit "milky". I
> have been searching for hours for any way to get the correct output. This
> happens with dnxhd dnxhq and dnxhdr. Given that re-encoding the quicktime
> version with ffmpeg does not produce the same colour shift, i.e. the output
> is identical I am thinking it is the way ffmpeg is dealing with the tiffs
> rather than the way the encoder is behaving, if this makes sense.
> Any ideas how/if I can resolve this?
> Seems like the ffmpeg file is in YUV full range, and the Quicktime output
> is in YUV legal range.
> Also called jpeg range (= full range), and mpeg range (legal range).

Of possible a slight difference in gamma?


> Martin
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