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Showing posts from March, 2019

Image and video conversion with FFmpeg and ImageMagick

These commands require FFmpeg and ImageMagick, available for both Windows and Linux.Convert an AVI to MP4ffmpeg -i input.avi -c:v libx264 -crf 19 -preset slow -c:a aac -b:a 192k -ac 2 out.mp4 Auto orient, resize and change quality of an imageconvert -auto-orient input.jpg -resize 2048 -quality 80 output.jpg Convert a series of images into a videoffmpeg -pattern_type glob -i 'cam*.jpg' -c:v libx264 out.mp4

SystemD reference sheet

Get default target (runlevel)systemctl get-default List all targets (runlevels)systemctl --type=target Set default target (runlevel)systemctl set-default List all running servicessystemctl --type=service See service statussystemctl status sshd Start servicesystemctl start sshd Enable servicesystemctl enable sshd Writing service scriptshttp://0pointer.de/blog/projects/systemd-for-admins-3.htmlDisable CTRL-ALT-DELsystemctl mask ctrl-alt-del.target systemctl daemon-reload