ffmpeg压缩视频指令

ffmpeg.exe -i 2-VID20211103172851-test.mp4 -vcodec libx265 -crf 28 -vf "transpose=2, scale=480:-1" -b:a 64k output_video2.mp4

-vcodec libx265 解码器 -crf 28，数越大越模糊 -vf "scale=480:-1" ，scale视频尺寸, The -1 will tell ffmpeg to automatically choose the correct height in relation to the provided width to preserve the aspect ratio. -1 can also be used for width if you provide a given height. -b:a audio压缩