I am new to ffmpeg and I want to create a square thumbnail of size 500x500 by cropping the center of the video, irrespective of width and height. How can I achieve this? Thanks in advance.
1 Answers
First crop, then scale.
ffmpeg -i in -vf "crop=w='min(min(iw\,ih)\,500)':h='min(min(iw\,ih)\,500)',scale=500:500,setsar=1" -vframes 1 thumbnail.jpg
x and y for crop aren't set as they default to center crop.
ffmpeg -i in -vf "crop=w='min(iw\,ih)':h='min(iw\,ih)',scale=500:500,setsar=1" -vframes 1 thumbnail.jpg
This will select the largest square possible and scalethat to 500x500.
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