[FFmpeg-user] Fluorescent White Balance Video Filters
astroelectronic at t-online.de
Tue Apr 19 21:43:10 EEST 2022
Am 19.04.2022 um 20:38 schrieb Paul B Mahol:
> On Tue, Apr 19, 2022 at 8:25 PM Michael Koch <astroelectronic at t-online.de>
>> Am 19.04.2022 um 03:34 schrieb Roger:
>>> I'm not finding much about fixing video having incorrect white space,
>>> specifically video with incorrect or forgotten fluorescent white balance
>>> setting during recording.
>>> I have a very old VHS recorded tape without a fluorescent white balance
>>> applied, and as such a green mask throughout the video.
>>> I started examing one frame of the video, luckily having distinct red,
>>> blue colors and was viewing the frame within RawTherapee and tinkering
>>> white balance settings. Low and behold, after applying the "Philips TL85
>>> fluorescent" (designated as "F10 - Philips TL85") white balance preset
>>> the red/green/blue values all appeared exact!
>>> However, I cannot find this preset profile within RawTherapee installed
>>> nor do the *.pp3 sidecar files indicate specific values, hinting the
>> values are
>>> either hard-coded or further buried within the installed system files,
>>> which fgrep insensitive searching still fails to find the specifics of
>>> Question, what is the proper method of applying such a missing white
>>> fluorescent filter to a video file using ffmpeg?
>> I would do that with a color-look-up-table. The procedure is described
>> step-by-step in chapter 2.27 and an easier simplified version is
>> described in chapter 2.28 in my book:
> Your book multiple times calls multiple functionality in FFmpeg stupid.
Not multiple functionality. Only one thing is called stupid.
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