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gifsicle:tldr:b41a7
This command is using a tool called "gifsicle" to manipulate GIF files.
The command syntax is as follows:
gifsicle -b ${path-to-input-gif} --delete '#${0-9}' '#${20-}'
Let's break it down step by step:
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"gifsicle" is the name of the command line tool that performs various operations on GIF images.
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"-b" is an option or flag used with the gifsicle command. This flag indicates that the original GIF file should be backed up before making any changes.
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"${path-to-input-gif}" is a placeholder for the actual path to the input GIF file that you want to modify. You need to replace this placeholder with the specific file path.
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"--delete" is another option used with gifsicle to specify that certain frames or parts of the GIF should be deleted.
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"'#${0-9}'" and "'#${20-}'" are patterns to specify which frames should be deleted. The notation "${0-9}" represents a range from 0 to 9, and "${20-}" represents a range from 20 to the end. The number sign (#) indicates that these ranges should be applied to frame numbers.
So, when you run this command, gifsicle will modify the specified input GIF file by deleting frames numbered 0 to 9, as well as frames numbered 20 and beyond. The original GIF file will be backed up, and the modified file will be saved in place of the original.