FFmpeg non-destructive change aspect ratio aspect

If the entire video is to be changed, remove the-SS-T parameter.

xx:+:9 Abc501output.avi

If the above is not successful, first turn to H264 encoded (will be very slow)

Ffmpeg-i abc.avi-vcodec libx264-acodec Copy Abc_output.avi

Besides,-VF scale is very powerful, it doesn't seem to fit

Https://trac.ffmpeg.org/wiki/Scaling%20 (resizing)%20with%20ffmpeg

Ffmpeg-i input.avi-vf scale=:+-i input.jpg-vf scale=:1  -I input.jpg-vfscale=:+-i input.jpg-vf scale=iw*2-I INPUT.JPG-VF scale=iw*. 5: ih*. 5 Input_half_size.png

Http://ffmpeg.org/documentation.html

FFmpeg non-destructive change aspect ratio aspect