mp4 file의 aspect ratio 바꾸는 법 (ffmpeg 이용)

Correct aspect ratio without re-encoding video file

There is a difference between Sample Aspect Ratio (SAR) and Display Aspect Ratio (DAR). If you want to change the video to display at 4:3, you will need to resize the image.

If you want to use FFmpeg to resize without re-encoding, try:

ffmpeg -i [INPUT] -s 720x540 -c copy [OUTPUT]

You can also try changing just the DAR with:

ffmpeg -i [INPUT] -aspect 720:540 -c copy [OUPTPUT]

키워드 : 가로세로비, 비율
검색어 : mp4 ratio