ffmpegHow to change video resolution and keep aspect ratio

In order to keep aspect ratio, set only one target dimension (width or height) and leave the other one as -1:

ffmpeg -i in.mp4 -vf scale=-1:180 out.mp4ctrl + cyoutubegithub

`-i in.mp4` input video file	`-vf` apply specific video filters
`scale=` change video resolution to specified size	`-1` width will be calculated automatically based on aspect ratio
`180` set height to `180` pixels	`out.mp4` resulting video file