Resize a video in one command





ffmpeg -i input.mp4 -vf "scale=1280:720" output.mp4






That's the simplest way to resize video with FFmpeg, taking input.mp4 and outputting it at 1280x720 pixels. If your source is 1920x1080, the aspect ratio matches and everything looks fine. If your source is 4:3 or vertical, the output gets stretched....