ffmpeg -i fuzhous.mp4 -i seas.mp4 -filter_complex “[0:v]fps=25[v0];[1:v]fps=25[v1];[v0][v1]xfade=transition=rectcrop:duration=2:offset=3,format=yuv420p” ff_xfade_rectcrop.mp4
ffmpeg -i fuzhous.mp4 -i seas.mp4 -filter_complex “[0:v]fps=25[v0];[1:v]fps=25[v1];[v0][v1]xfade=transition=rectcrop:duration=2:offset=3,format=yuv420p” ff_xfade_rectcrop.mp4