Am 14.01.2019 um 08:40 schrieb Michael Koch:
Am 14.01.2019 um 07:28 schrieb Michael Koch:
When I create a color-look-up-table with this command line, the
result is a 512x512 clut saved as 16-bit PNG. It works as expected
and I checked that the top left pixel is black (R=0, G=0, B=0) and
the bottom right pixel is white (R=65026, G=65026, B=65026).
c:\ffmpeg\ffmpeg -f lavfi -i haldclutsrc=8 -frames 1 -pix_fmt rgb48be
-y clut.png
In the next example I wanted to extract one frame from a video,
overlay the clut in the top left corner, and save it as 16-bit PNG. I
need 16-bit PNG because my video is 10-bit. At first glimpse the
result looks good, but a closer examination finds that the top left
pixel is not pure black, it's R=0, G=1285, B=0, and the bottom right
pixel of the clut (at coordinates 511,511) is not pure white, it's
R=65535, G=63736, B=65535. Why are the colors wrong?
c:\ffmpeg\ffmpeg -ss 5 -i P1000099.mov -f lavfi -i haldclutsrc=8
-filter_complex overlay -frames 1 -pix_fmt rgb48be -y
Image_with_CLUT.png
I found a solution myself: overlay=format=rgb
But the output of the overlay filter seems to be RGB24. Is it possible
to get RGB48 out of the overlay filter? Or is there any other filter for
overlaying two RGB48 images?
Michael
_______________________________________________
ffmpeg-user mailing list
[email protected]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
[email protected] with subject "unsubscribe".
