ffmpeg -i video1.mp4 -i video2.mp4 -f lavfi -i color=black -filter_complex '[0:v]fade=t=out:st=4:d=1:alpha=1,setpts=PTS-STARTPTS[v0];[1:v]fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+5/TB[v1];[2:v]scale=hd720,trim=duration=15[base];[base][v0]overlay[base1];[base1][v1]overlay[outv]' -map [outv] out.mp4

ffmpeg -i img.mp4 -i video1.mp4 -i video2.mp4 -f lavfi -i color -filter_complex '[0:v] fade=t=out:st=4:d=1:alpha=1,setpts=PTS-STARTPTS [v0];[1:v] fade=t=in:st=0:d=1:alpha=1,fade=t=out:st=4:d=1:alpha=1,setpts=PTS-STARTPTS+5/TB [v1];[2:v] fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+10/TB [v2];[3:v] scale=hd720,trim=duration=20 [base];[base][v0] overlay [base1];[base1][v1] overlay [base2];[base2][v2] overlay [outv]' -map [outv] out.mp4

ffmpeg -i img.mp4 -i video1.mp4 -filter_complex '[0:0]scale=320:240[v0];[1:0][v0]overlay=overlay_w:overlay_h [outv]' -map [outv] pip_video.mp4

ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex '[0:0]scale=320:240[a];[1:0][a]overlay=overlay_w:overlay_h' out.avi


ffmpeg -i video1.mp4 -i video2.mp4 -f lavfi -i color=black -filter_complex '[0:v]fade=t=out:st=5:d=1:alpha=1,setpts=PTS-STARTPTS[va0];[1:v]fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+5/TB[va1];[2:v]scale=hd720,trim=duration=15[over];[over][va0]overlay[over1];[over1][va1]overlay[outv];[0:a]atrim=end=5,asetpts=PTS-STARTPTS[a1];[1:a]atrim=end=10,asetpts=PTS-STARTPTS[a2];[a1][a2]concat=n=2:v=0:a=1[outa]' -map [outa] -map [outv] video.mp4

set boxwidth 0.8

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