../../ffmpeg -i EndCard.mp4 -i segment2.mp4 -i segment2.mp4 -filter_complex \
"[1]scale=iw/2.5:ih/2.5 [pip1]; \
[pip1]fade=t=in:st=5.5:d=0.5 [pip1b]; \
[2]scale=iw/2.5:ih/2.5 [pip2]; \
[0][pip1b]overlay=main_w/2-overlay_w-10:main_h-overlay_h-320:shortest=1[a]; \
[a][pip2]overlay=main_w/2+10:main_h-overlay_h-320:shortest=1" \
-shortest PIP_output1.mp4