If you are lucky or smart enough to use Ubuntu, then you have a wealth of tools sitting just under your keyboard that you might\u00a0know owt about.<\/p>\n
Two of those are the convert and mogrify tools, which come from the Imagemagick<\/a> stable. I use these quite frequently for batch conversion jobs.<\/p>\n Here is an example of what these tools can do, specifically mogrify<\/strong> which acts on batches of files.<\/p>\n I have a folder load of transparent images that the client wants on a white background, so I open the command line, navigate to that folder (or just open the command line in that folder directly using Nemo instead of Nautilus) and type the following incantation:<\/p>\n mogrify -format jpg -quality 100 -fill white -opaque none *.png<\/strong><\/span><\/p>\n If we break this down into individual components, then<\/p>\n mogrify<\/span><\/strong> this is the command itself<\/p>\n -format jpg <\/strong><\/span>The output format, in this case jpg<\/p>\n -quality 100 <\/strong><\/span>for jpgs specifies the compression or quality levels. 100 is tops, 1 is rubbish.<\/p>\n -fill white<\/strong><\/span> the colour of the fill which will be determined by the next command.<\/p>\n -opaque none<\/span><\/strong> deals with the alpha (transparency) channel, by filling it with a colour, which has handily just been specified.<\/p>\n *.png<\/strong><\/span> simply tells mogrify to grab any file that ends in “.png”<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" If you are lucky or smart enough to use Ubuntu, then you have a wealth of tools sitting just under your keyboard that you might\u00a0know owt about. Two of those are the convert and mogrify tools, which come from the … Continue reading