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I have created both animated gif files with Photoshop CS5.1 (combining single frames; gif 128 with dithering) and FFMPEG via command line (converting a .mov file to a .gif file; -pix_fmt rgb24).

Photoshop's output resembles the original images much more than FFMPEG does in terms of colors. What is the reason for this?

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Just a guess... FFMPEG probably doesn't use color management. You may find opening the FFMPEG Gif in Photoshop and using Edit > Assign Profile yields proper colors. –  Scott Sep 10 '13 at 14:17

2 Answers 2

GIF is a lossy format. Every GIF export tool can use different compression methods--including how it may re-map colors.

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So does anybody knows freeware that does a good job in converting a movie file to .gif while maintaining the quality as much as possible. I do not care so much about file size. –  Vincent Sep 10 '13 at 16:14
    
@Vincent I'd ask that as a new question...perhaps on SuperUser –  DA01 Sep 10 '13 at 17:06

Image Magick

More than ffmpeg a quite versatile tool to convert video clips to an animated GIF is the convert module from the Image Magick suite. After having installed the suite a most basic conversion can be done with:

convert -delay 1 input.mov output.gif

For more details especially on different methods for GIF conversion and color palette processing this great tutorial is recommended:

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