Deep dive into the ffmpeg man page

gen_intro.sh

#!/usr/bin/env bash

IMGDIR=/home/john/Projects/video_projects/notd/assets/images/intro/
VIDDIR=/home/john/Projects/video_projects/notd/assets/video/
TMPDIR=tmp/
OUTPUTDIR=../tmp/
#ls $IMGDIR
mkdir $TMPDIR
# create init sequence from pngs --> step0
ffmpeg -r 6 -f image2 -s 1920x1080 -i ${IMGDIR}notd_init/%03d.png -vcodec libx264 -crf 5  -pix_fmt yuv420p ${TMPDIR}step0.mp4 &&
# set framerate for init sequence to 25 --> step1
ffmpeg -i ${TMPDIR}step0.mp4 -filter:v fps=fps=25 ${TMPDIR}step1.mp4 &&
# create six seconds of white @ 25fps --> step 2
ffmpeg -f lavfi -i [email protected]:s=hd1080:duration=6:rate=25 ${TMPDIR}step2.mp4 &&
# create large teaparty for panning across empty bg --> step3
ffmpeg -loop 1 -i ${IMGDIR}Tea_Party.png -c:v libx264 -t 6 -pix_fmt yuv420p -vf scale=3840:2160 ${TMPDIR}step3.mp4 &&
# pan step3 result across blank bg from left to right --> step4
ffmpeg -f lavfi -i [email protected]:s=hd1080:duration=6:rate=25 -i ${TMPDIR}step3.mp4 -filter_complex "[0][1]overlay=x='if(lte(-w/2+(t)*800,-500),-w/2+(t)*800,-500)':y=-650[out]" -map [out] -y ${TMPDIR}step4.mp4 &&
# create large occupy for panning across empty bg --step5
ffmpeg -loop 1 -i ${IMGDIR}occupyws.png -c:v libx264 -t 6 -pix_fmt yuv420p -vf scale=3840:2160 ${TMPDIR}step5.mp4 &&
# pan step5 result across blank bg from right to left -- step6
ffmpeg -f lavfi -i [email protected]:s=hd1080:duration=6:rate=25 -i ${TMPDIR}step5.mp4 -filter_complex "[0][1]overlay=x='if(gte(w/3-(t)*800,0),-(t)*800,-w/3)':y=-400[out]" -map [out] -y ${TMPDIR}step6.mp4 &&
# fade step4 result (teaparty slide) into blank bg from step2 result --> step7
ffmpeg -i ${TMPDIR}step2.mp4 -i ${TMPDIR}step4.mp4 -filter_complex "[1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+0/TB[over];[0:v][over]overlay=format=yuv420[outv]" -vcodec libx264 -map [outv] ${TMPDIR}step7.mp4 &&
# crosfade step7 result with step6 result --> step8
ffmpeg -i ${TMPDIR}step7.mp4 -i ${TMPDIR}step6.mp4 -f lavfi -i color=black:s=hd1080 -filter_complex "[0:v]format=pix_fmts=yuva420p,fade=t=out:st=3:d=1:alpha=1,setpts=PTS-STARTPTS[va0];[1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+3/TB[va1];[2:v]scale=1920x1080,trim=duration=9[over];[over][va0]overlay[over1];[over1][va1]overlay=format=yuv420[outv]" -vcodec libx264 -map [outv] ${TMPDIR}step8.mp4 &&
# create from 2016 map --> step9
ffmpeg -loop 1 -i ${IMGDIR}map2016.png -c:v libx264 -t 4 -pix_fmt yuv420p ${TMPDIR}step9.mp4 &&
# slide step9 result (2016 map) down from top over step8 result at second 6 --> step10
ffmpeg -i ${TMPDIR}step8.mp4 -i ${TMPDIR}step9.mp4 -filter_complex "[1]setpts=PTS-STARTPTS+5/TB[over];[0][over]overlay=x=0:y='if(lte(-h+(t-5)^4*600,0),-h+(t-5)^4*600,0)'[out]" -map [out] ${TMPDIR}step10.mp4 &&
# create zoomout from JH Covid-19 Map --> step11
ffmpeg -framerate 25 -loop 1 -i ${IMGDIR}covid19_jh_map_test.png -filter_complex "[0:v]zoompan=z='if(lte(zoom,1.0),4.5,max(1.001,zoom-0.05))':x='iw/3-(iw/zoom/3)':y='ih/4-(ih/zoom/4)':d=250,scale=1920x1080,trim=duration=5[v]" -map "[v]" -y ${TMPDIR}step11.mp4 &&
# crosfade step10 result with step11 result --> step12
ffmpeg -i ${TMPDIR}step10.mp4 -i ${TMPDIR}step11.mp4 -f lavfi -i color=black:s=hd1080 -filter_complex "[0:v]format=pix_fmts=yuva420p,fade=t=out:st=7:d=1:alpha=1,setpts=PTS-STARTPTS[va0];[1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+7/TB[va1];[2:v]scale=1920x1080,trim=duration=11[over];[over][va0]overlay[over1];[over1][va1]overlay=format=yuv420[outv]" -vcodec libx264 -map [outv] ${TMPDIR}step12.mp4 &&
# slide trump over step12 result --> step13
ffmpeg -i ${TMPDIR}step12.mp4 -i ${VIDDIR}trumpeaster.mp4 -filter_complex "[1:v]split[a][b];[a]crop=iw:ih/2:0:0,setpts=PTS+10/TB[top]; [b]crop=iw:ih/2:0:ih/2,setpts=PTS+10/TB[bottom]; [0:v][top]overlay=enable='between(t,10,13)':x='if(lte(-w+(t-10)*1000,0),-w+(t-10)*1000,0)':y=0[tmp]; [tmp][bottom]overlay=enable='between(t,10,13)':x='if(gte(w-(t-10)*1000,0),w-(t-10)*1000,0)':y=h,trim=duration=13[out]" -map [out] -y ${TMPDIR}step13.mp4 &&

# concatenate step1 result (init sequence) with step13 result (teaparty fadein) --> step14
echo file \'${TMPDIR}step1.mp4\' >> inputs.txt &&
echo file \'${TMPDIR}step13.mp4\' >> inputs.txt &&
ffmpeg -f concat -i inputs.txt -c copy ${OUTPUTDIR}step14.mp4 &&

rm inputs.txt &&
rm -rf ${TMPDIR}