ffmpeg

docker run --rm -it \
-v /opt/docker-work/ffmpeg-container/90.mov:/config/90.mov \
-v /opt/docker-work/img/test.jpg:/config/test.jpg \
linuxserver/ffmpeg \
-i /config/90.mov \
-skip_frame nokey \
-r 20 \
-frames:v 1 \
-y \
/config/test.jpg