[FFmpeg-user] ffmpeg keep aspect ratio when scaling, keep dimensions divisable by n

[mail-login+ffmpeg at protonmail.com]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, April 9, 2020 1:00 PM, Peter van den Houten <petervdh at gmail.com> wrote:
> 

> Try:
> 

> ffmpeg -i video.MTS -vf scale=720:-2 -c:v libx264 -crf 20 -c:a copy -y padded.MTS
> 

> Change -crf 20 up or down to suit quality and/or file size.
> 

> Regards
> Peter

Yes I noticed that, the problem with this is that I want my script to be as general as possible so I don't know in advance which dimension has to be scaled.

Cheers
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