String fadeInImagesToVideo="ffmpeg -loop 1 -t 1 -i /sdcard/videokit/frames_1.png -loop 1 -t 1 -i /sdcard/videokit/frames_2.png -loop 1 -t 1 -i /sdcard/videokit/frames_3.png -loop 1 -t 1 -i /sdcard/videokit/frames_4.png -loop 1 -t 1 -i /sdcard/videokit/frames_5.png -filter_complex [0:v]trim=duration=15,fade=t=out:st=14.5:d=0.5[v0];[1:v]trim=duration=15,fade=t=in:st=0:d=0.5,fade=t=out:st=14.5:d=0.5[v1];[2:v]trim=duration=15,fade=t=in:st=0:d=0.5,fade=t=out:st=14.5:d=0.5[v2];[3:v]trim=duration=15,fade=t=in:st=0:d=0.5,fade=t=out:st=14.5:d=0.5[v3];[4:v]trim=duration=15,fade=t=in:st=0:d=0.5,fade=t=out:st=14.5:d=0.5[v4];[v0][v1][v2][v3][v4]concat=n=5:v=1:a=0,format=yuv420p[v] -map [v] /sdcard/out.mp4";

String crossFadeImagesToVideo="ffmpeg -loop 1 -t 1 -i /sdcard/videokit/frames_1.png -loop 1 -t 1 -i /sdcard/videokit/frames_2.png -loop 1 -t 1 -i /sdcard/videokit/frames_3.png -loop 1 -t 1 -i /sdcard/videokit/frames_4.png -loop 1 -t 1 -i /sdcard/videokit/frames_5.png -filter_complex [1:v][0:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b1v];[2:v][1:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b2v];[3:v][2:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b3v];[4:v][3:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b4v];[0:v][b1v][1:v][b2v][2:v][b3v][3:v][b4v][4:v]concat=n=9:v=1:a=0,format=yuv420p[v] -map [v] /sdcard/videokit/crossfade.mp4";