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Michael Rampe
Re: ffmpeg GIF output ugly.
on Aug 30, 2010 at 8:14:47 am

I got exactly the same results when trying to replicate your issue.

Based on the info about only reporting 103 versus 256 colors, my guess is that ImageMagick is using 256 indexed colors whilst FFmpeg is using a fixed 256 level system color palette.

I confirmed this theory in Photoshop. I converting your original jpeg to indexed color in photoshop. (Photoshop: Image/Mode/Indexed color...) By using the local selection, the image is converted like ImageMagick. By using the system or web selection (without diffusion), I get an image like FFmpeg.

Thus, FFmpeg is using a system color palette (or more likely a web palette) in converting GIFs.

Michael

"half-way to world domination A.K.A. the belligerent blue bike shed"


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Current Message Thread:
  • ffmpeg GIF output ugly. by Carl Oxwall on Aug 17, 2010 at 4:36:06 pm
    • Re: ffmpeg GIF output ugly. by Michael Rampe on Aug 30, 2010 at 8:14:47 am





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