在caffe的example中,有一个很好的例子
#!/bin/bash
EXPECTED_ARGS=2
E_BADARGS=65
if [ $# -lt $EXPECTED_ARGS ]
then
echo "Usage: `basename $0` video frames/sec [size=256]"
exit $E_BADARGS
fi
NAME=${1%.*}
FRAMES=$2
BNAME=`basename $NAME`
echo $BNAME
mkdir -m 755 $BNAME
ffmpeg -i $1 -r $FRAMES $BNAME/$BNAME.%4d.jpg