You can find additional examples of using mogrify in Examples of ImageMagick Usage. They are copies of their respective PNG images except are stored in the JPEG image format. Here image files 1.png, 2.png, etc., are left untouched and files 1.jpg, 2.jpg, etc., are created. You can resize all your JPEG images in a folder to a maximum dimension of 256x256 with this command: magick mogrify -resize 256x256 *.jpgįinally, we convert all our PNG images in a folder to the JPEG format: magick mogrify -format jpg *.png
Rose: magick mogrify -resize 50% rose.jpg To get started, let's reduce the size of our We list a few examples of the mogrify command here to illustrate its usefulness and ease of use.
See Command Line Processing for advice on how to structure your mogrify command or see below for sample usages of the command. This tool is similar to magick except that the original image file is overwritten (unless you change the file suffix with the -format option) with any changes you request. Unfortunately you can’t use -2 for both width and height, but if you already specified one dimension then using -2 is a simple solution.Use the magick mogrify program to resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more. However, most non-FFmpeg based players can only properly decode 4:2:0, so that is why you often see ffmpeg commands with the -pix_fmt yuv420p option when outputting H.264 video. 4:2:2 would need “divisible by 2 for width”, and 4:4:4 does not have these restrictions. Same as above, but with a declared height instead leaving width to be dealt with by the filter:Īs required by x264, the “divisible by 2 for width and height” is needed for YUV 4:2:0 chroma subsampled outputs. Set width to 1280, and height will automatically be calculated to preserve the aspect ratio, and the height will be divisible by 2: After that it will, however, make sure that the calculated dimension is divisible by n and adjust the value if necessary. If one of the values is -n with n > 1, the scale filter will also use a value that maintains the aspect ratio of the input image, calculated from the other specified dimension. If you would like to scale your video using FFMPEG you can do this by Just using -2įrom the FFMPEG scale filter documentation:
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