Transitions with fewer images about ffmpeg-video-slideshow-scripts HOT 5 CLOSED

ffmpeg -y \
-loop 1 -i ../photos/1.jpg \
-loop 1 -i ../photos/2.jpg \
-filter_complex "\
[0:v]setpts=PTS-STARTPTS,scale=w='if(gte(iw/ih,1920/1280),min(iw,1920),-1)':h='if(gte(iw/ih,1920/1280),-1,min(ih,1280))',scale=trunc(iw/2)*2:trunc(ih/2)*2,setsar=sar=1/1,format=rgba,split=2[stream1out1][stream1out2];\
[1:v]setpts=PTS-STARTPTS,scale=w='if(gte(iw/ih,1920/1280),min(iw,1920),-1)':h='if(gte(iw/ih,1920/1280),-1,min(ih,1280))',scale=trunc(iw/2)*2:trunc(ih/2)*2,setsar=sar=1/1,format=rgba,split=2[stream2out1][stream2out2];\
[stream1out1]pad=width=1920:height=1280:x=(1920-iw)/2:y=(1280-ih)/2:color=#00000000,trim=duration=3,select=lte(n\,90)[stream1overlaid];\
[stream1out2]pad=width=1920:height=1280:x=(1920-iw)/2:y=(1280-ih)/2:color=#00000000,trim=duration=1,select=lte(n\,30)[stream1ending];\
[stream2out1]pad=width=1920:height=1280:x=(1920-iw)/2:y=(1280-ih)/2:color=#00000000,trim=duration=2,select=lte(n\,60)[stream2overlaid];\
[stream2out2]pad=width=1920:height=1280:x=(1920-iw)/2:y=(1280-ih)/2:color=#00000000,trim=duration=1,select=lte(n\,30)[stream2starting];\
[stream1ending][stream2starting]overlay=y='-h+t/1*1280':x=0,select=lte(n\,30)[stream2blended];\
[stream1overlaid][stream2blended][stream2overlaid]concat=n=3:v=1:a=0,format=yuv420p[video]"\
 -map [video] -vsync 2 -async 1 -rc-lookahead 0 -g 0 -profile:v main -level 42 -c:v libx264 -r 30 ../transition_wipe_in_vertical.mp4