How to extract last frame from video

[bluedrag]

LAST_FRAME=`ffprobe -show_streams xxx.mp4 2>/dev/null|fgrep nb_frames|head -1|perl -ne '/(\d+)/; print $1-1'`
ffmpeg -i xxx.mp4 -vf "select='eq(n,$LAST_FRAME)'" -vframes 1 last_frame.png