The environment variable MAGICK_TMPDIR is a path to a directory at which ImageMagick can store temporary files. The environment variable MAGICK_THREAD_LIMIT limits the number of threads used by ImageMagick (when it is built with OpenMP enabled). Set up ImageMagick such that it doesn't consume excessive system resources: export MAGICK_MEMORY_LIMIT=1024 To illustrate the procedure, I use the example of converting a video to an animated GIF. It has been tested with ImageMagick 6.8.9-9 on Ubuntu 15.04. If you prefer using the command line to perform tasks, click here to access a web page that provides a set of examples using ImageMagick from the command line.The following procedure prevents ImageMagick from consuming excessive system resources. To close Eye of Gnome, select Close from the File menu. The viewer opens displaying the specified image. So, to view the converted image file type the following command: $ eog sample.jpg To run Eye of Gnome from the command line, simply type eog. Using Eye of Gnome, you can quickly view the following images: ani, bmp, gif, ico, jpeg, pcx, png, pnm, ras, svg, tga, tiff, wbmp, xbm, and xpm. The default image viewer in Ubuntu is called Eye of Gnome. There is a quick way to view the converted image. $ convert –quality 80 sample.png sample.jpgĪ JPEG file called sample.jpg is created in the same directory as the original. The following command converts sample.png into a JPEG image with a quality of 80. Generally, a value between 60 and 80 is good enough for most uses. Remember that the better the quality (the higher the number), the bigger the file size. You can set a value between 0 (poorest quality) to 100 (highest quality). There is a command switch, –quality, that allows you to specify the quality of the resulting. However, converting an image into a JPEG sacrifices image quality for file size. For example, the following command will convert a PNG file to a JPEG file. Once ImageMagick is installed, simply use the convert command in a terminal window. Select Quit from the File menu to close the Synaptic Package Manager. The Changes applied dialog box displays when the installation is finished. Click the Apply button to continue with the installation.Ī Summary screen displays listing all the changes that will be made. A yellow arrow displays over the check box next to imagemagick, indicating it is marked for installation.

Linux imagemagick convert mp4 to gif