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minimaxir / video-to-gif-osx

A set of utilities that allow the user to easily convert video files to very-high-quality GIFs on OS X.
MIT License
394 stars 28 forks source link

Image/Color Compression #2

Open shmshrbali opened 9 years ago

shmshrbali commented 9 years ago

In your blog you state " limits the color pallete to 256 colors " Is there a way to change this setting? I couldnt find anything on gifsicle, And i dont mind the gif size being bigger for internal usage and would like the images to "look" a lot better.

minimaxir commented 9 years ago

Yes: the gifsicle command has a --colors 256 parameter; just change the 256. I did not notice a huge benefit when increasing it, however.

shmshrbali commented 9 years ago

Gifsicle doesnt accept paramter above 256 in colors.. the only other thing i found was --no-option which i couldnt get to work. Do you know how to use that? screen shot 2015-08-17 at 7 45 03 pm

minimaxir commented 9 years ago

Ah, that's interesting, did not know that. Would removing the --colors 256 parameter completely work?

shmshrbali commented 9 years ago

According to the documentation the color options can be turned off using the command, atleast thats what it implies. Havent been able to run it, so cant confirm. If you can give it a try let me know? you can label this issue off-topic though since its nothing to do with with this repo. But i'd appreciate if you could have a look?

minimaxir commented 9 years ago

Ran the test case w/o the --colors 256. Output was larger (100KB vs. 73KB), which implies that it works to avoid color compression. However, the console yells at you:

gifsicle: warning: too many colors, using local colormaps (You may want to try ‘--colors 256’.)

shmshrbali commented 9 years ago

Sounds good can you tell how you got it to run for you? I'll give it a try immediately and see what kind of difference does it make in quality..

shmshrbali commented 9 years ago

After some experimentation i realised it was partly the imagemagick problem :- -fuzzy i removed and the rest was the dithering used which unfortunately nothing can be done about, fair about though on most cases if i remove fuzzy and dither using a different algorithm the gif's are coming out a lot smoother...