F

Convert frames from a video or GIF into individual numbered images

ffmpeg -i bones-kirk.mp4 frame_%d.jpg

Extract frame 120 from a video to a jpg:

ffmpeg -i trek.mp4 -vf "select=eq(n\,120)" -vframes 1 trek.jpg

Make a static-image video from an audio track

ffmpeg -loop 1 -i tta.jpg -i dark-escape.mp3 -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest out.mp4

Fidalgo Island, in Washington State. Mecca if you’re a day hiker.

 

 

find

Scan your Calibre library recursively and copy the text files to a single directory:

find . -name "*.txt" -exec cp {} /home/teresita/Desktop/hold \;