ffmpeg resize and scale

ffmpeg缩小视频尺寸 | 楚盟博客 https://www.5yun.org/13126.html

ffmpeg -i test.mp4  -s 480×360  out.mp4

常用分辨率：

1080P=1920*1080
720p=1280×720
480p=720X480
360p=480×360
240p=320X240

 ffmpeg-resize and scale - CSDN博客 https://blog.csdn.net/rootusers/article/details/41648297