ffmpeg常用命令

记录下自己用过的：

1.RTMP推流

ffmpeg -re -i c001.mp4 -c copy -f flv rtmp://pili-publish.www.spreadwin.com/xiaojing-zhibo/allwinner_002

2.截取一段长度
ffmpeg -i c001.mp4 -c copy -t 10 c001_10s.mp4

3.解码成某一像素格式
ffmpeg -i c001_10s.mp4 -pix_fmt nv21 001_nv21.yuv

ffmpeg -i c001_10s.mp4 -pix_fmt yuyv422 001_yuyv422.yuv

ffmpeg -i c001_10s.mp4 -pix_fmt yuv422p 001_yuv422p.yuv

4.播放某种格式的YUV数据
ffplay -i 001_nv21.yuv -pix_fmt nv21 -s 320x240

ffplay -i 001_yuyv422.yuv -pix_fmt yuyv422 -s 320x240

5.给视频添加时间水印

ffmpeg -i 1.flv -vf drawtext="fontfile=C\\:/Windows/Fonts/arial.ttf:x=w-tw:fontcolor=white:fontsize=30:text='%{localtime\:%Y-%m-%d %H\\\:%M\\\:%S}'" out.flv

后续继续补充！