To extract a single frame from a video is useful if you need to measure cropping pixels from the whole video as in Section 90.9.
$ ffmpeg -ss 0.5 -i input.mkv -vframes 1 frame.jpg
Here we skip a little for the beginning, identify the input file, extract 1 video frame and save it to a jpg file.
Your donation will support ongoing availability and give you access to the PDF version of this book. Desktop Survival Guides include Data Science, GNU/Linux, and MLHub. Books available on Amazon include Data Mining with Rattle and Essentials of Data Science. Popular open source software includes rattle, wajig, and mlhub. Hosted by Togaware, a pioneer of free and open source software since 1984. Copyright © 1995-2022 Graham.Williams@togaware.com Creative Commons Attribution-ShareAlike 4.0