docker_ffmpeg.sh

# sample command to capture camera output, makesure ffmpeg is installed
ffmpeg -f video4linux2 -i /dev/video0 -vframes 1  -video_size 640x480 test.jpeg

# To run the same thing inside the docker image
# run docker in privilaged mode with binding appropriate dirs
docker run --privileged \
  --mount type=bind,source=/dev,target=/dev \
  --mount type=bind,source=/home/fatlady,target=/root \
  --rm -it alpine /bin/sh

# install ffmpeg inside the container
apk add ffmpeg

# run the same command as above to capture the output
ffmpeg -f video4linux2 -i /dev/video0 -vframes 1  -video_size 640x480 test.jpeg