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

[Werner Robitza]

On Thu, Jan 2, 2014 at 11:32 AM, （忍）不轻云 <449127727 at qq.com> wrote:
> source file is 1360x768
>
>
> if(gt(a,16/9),1280,trunc(oh*a*2)/2)':'if(gt(a,16/9),trunc(ow/a/2)*2,720)  the result is 1275x720.

Two problems:

* 1280, trunc(oh…) does not make sense. You should use "ow" here as I
previously mentioned.
* trunc(oh*a*2)/2 will probably result in an odd number. Try
trunc(ow*a/2)*2 instead.

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