Extract frames as JPGs:
ffmpeg -i video.mp4 -r 24 -f image2 img/img_%5d.jpg
-r
: frame rate
Extract frame at specific time:
ffmpeg -i video.mp4 -ss 00:00:01.000 -f image2 -vframes 1 myImage.jpg
ffmpeg -i video.mp4 -r 24 -f image2 img/img_%5d.jpg
-r
: frame rate
ffmpeg -i video.mp4 -ss 00:00:01.000 -f image2 -vframes 1 myImage.jpg