Linux command
ppmtogif 命令
文本
涉及管道、覆盖或删除，执行前请先确认路径和参数。
常用示例
Convert PPM to GIF
ppmtogif [input.ppm] > [output.gif]
With transparency
ppmtogif -transparent [color] [input.ppm] > [output.gif]
Interlaced GIF
ppmtogif -interlace [input.ppm] > [output.gif]
With alpha transparency
ppmtogif -alpha [mask.pgm] [input.ppm] > [output.gif]
说明
ppmtogif converts PPM images to GIF format. GIF is limited to 256 colors, so use ppmquant first if needed. This program was superseded by pamtogif in Netpbm 10.37 (December 2006). New use of ppmtogif is discouraged; use pamtogif instead. Part of the Netpbm toolkit.
参数
- -transparent =_color_
- Make the specified color transparent. If prefixed with =, only an exact match is used; otherwise the closest color in the image is selected.
- -alpha _pgmfile_
- Use a PGM file as an alpha (transparency) mask. White is opaque, black is transparent. Cannot be used with -transparent.
- -interlace
- Produce an interlaced GIF file.
- -sort
- Produce a GIF file with the colormap sorted in a predictable order.
- -map _mapfile_
- Use colors from the specified PPM file as the colormap instead of the colors in the input image.
- -comment _text_
- Include a comment in the GIF output.
- -nolzw
- Do not use LZW compression. Produces larger but unencumbered output.
FAQ
What is the ppmtogif command used for?
ppmtogif converts PPM images to GIF format. GIF is limited to 256 colors, so use ppmquant first if needed. This program was superseded by pamtogif in Netpbm 10.37 (December 2006). New use of ppmtogif is discouraged; use pamtogif instead. Part of the Netpbm toolkit.
How do I run a basic ppmtogif example?
Run `ppmtogif [input.ppm] > [output.gif]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -transparent =_color_ do in ppmtogif?
Make the specified color transparent. If prefixed with =, only an exact match is used; otherwise the closest color in the image is selected.