ffmpeg处理视频,加水印、截图

#!/bin/sh

#${1}ffmpeg -threads 4 -i ${2} -vf "movie=${1}logo.png [watermark];[in][watermark] overlay=main_w-overlay_w-10:12 [out]" ${4} && #${1}ffmpeg -i ${4} -y -f image2 -t 0.001 ${3}&&echo 1

ff=$(${1}ffmpeg -i ${2}  2>&1) d="${ff#*Video: }" size=$(echo $d|awk -F, '{print $3}')

width=$(echo $size|awk -Fx '{print $1}') height=$(echo $size|awk -Fx '{print $2}')

${1}ffmpeg -y -i ${2}  -vf "movie=${1}logo.png,scale = 161*(${width}/480):25*(${height}/480)  [watermark];[in][watermark] overlay=main_w-overlay_w-10:12 [out]"  ${4}

${1}ffmpeg -i ${4} -y -f image2 -t 0.001 ${3}&&echo 1