Am 19.05.2024 um 19:02 schrieb Steven Kan:
I have a series of 476 PNGs, exported from Excel in a loop through a series of
values to control the plotted range:
https://www.kan.org/download/1.png
https://www.kan.org/download/2.png
https://www.kan.org/download/3.png
https://www.kan.org/download/4.png
https://www.kan.org/download/5.png
etc.
If I convert them to MP4:
ffmpeg -i %d.png -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2,scale=1920:-1" -c:v libx264
-y WeightLogLapse.mp4
the resulting video looks as I would expect:
https://www.kan.org/download/WeightLogLapse.mp4
But if I convert to GIF:
ffmpeg -i %d.png -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2,scale=1920:-1" -y
WeightLogLapse.gif
I get this weird color aliasing:
It's a known problem. A workaround is described in chapter 2.70 in my book:
http://www.astro-electronic.de/FFmpeg_Book.pdf
Michael
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