How to use FFMPEG to stack two equirectangular images to top/bottom format?

Solution 1:

This line:

ffmpeg -i left.jpg -i right.jpg -filter_complex "[0]scale=iw:ih*2[grande],[grande][0]overlay=x=0:y=0[base],[base][1]overlay=x=0:y=h" -y top-bottom.jpg

Can be simplified in:

ffmpeg -i left.jpg -i right.jpg -filter_complex vstack=inputs=2 -y top-bottom.jpg