使用ffmpeg为视频文件添加水印

    #!/bin/bash ffmpeg -y -i jiushu.mpg -acodec libfaac -b:a 30k -ar 44100 -r 15 -ac 2 -s 480x272 -vcode

    #以下脚本保存成.sh文件运行，不会出现中文乱码问题 网上查到用enable关键字控制，实际是draw
    #加水印 水印位置由x,y,w,h来控制
    #ffmpeg编译时需--enable-libfreetype才能用此功能
    #!/bin/bash
    ffmpeg -y -i jiushu.mpg -acodec libfaac -b:a 30k -ar 44100 -r 15 -ac 2 -s 480x272 -vcodec libx264 -refs 2 -x264opts keyint=150:min-keyint=15 -vprofile baseline -level 20 -b:v 200k -vf "drawtext=fontfile=~/font/simhei.ttf: text='来源：测试':x=100:y=x/dar:fontsize=24:fontcolor=yellow@0.5:shadowy=2"  drawtext.mp4     

    #加水印，显示10秒
    #!/bin/bash
    ffmpeg -y -i jiushu.mpg -acodec libfaac -b:a 30k -ar 44100 -r 15 -ac 2 -s 480x272 -vcodec libx264 -refs 2 -x264opts keyint=150:min-keyint=15 -vprofile baseline -level 20 -b:v 200k -vf "drawtext=fontfile=~/font/simhei.ttf: text='来源：测试':x=100:y=x/dar:draw='if(gt(n,0),lt(n,250))':fontsize=24:fontcolor=yellow@0.5:shadowy=2"  drawtext.mp4   

    #加水印，每3秒显示1秒
    #!/bin/bash
    ffmpeg -y -i jiushu.mpg -acodec libfaac -b:a 30k -ar 44100 -r 15 -ac 2 -s 480x272 -vcodec libx264 -refs 2 -x264opts keyint=150:min-keyint=15 -vprofile baseline -level 20 -b:v 200k -vf "drawtext=fontfile=~/font/simhei.ttf: text='来源：QQ12345678':x=w-100:y=100:draw=lt(mod(t\,3)\,1):fontsize=24:fontcolor=yellow@0.5:shadowy=2"  drawtext.mp4


    ffmpeg -y -i /tmp/Wildlife.wmv -acodec copy -b 300k -vf "drawtext=fontfile=~/font/simhei.ttf: text='来源：QQ12345678':x=w-100:y=100:draw=lt(mod(t\,3)\,1):fontsize=24:fontcolor=yellow@0.5:shadowy=2" /tmp/out.wmv