[FFmpeg-user] how to equal ratio scale the video

[Werner Robitza]

On Thu, Jan 2, 2014 at 9:59 AM, （忍）不轻云 <449127727 at qq.com> wrote:
> if(gt(a,16/9),1280,trunc(oh*a*2)/2)':'if(gt(a,16/9),trunc(ow/a/2)*2,720)

I could be mistaken since you haven't described what you want to
accomplish, but 1280 is the width, so you need:

1280,trunc(ow*a*2)/2

Likewise, for the second part:

trunc(oh/a/2)*2,720)