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ffmpeg

How to slide mutiple images left continuously?

I use ffmpeg to slide images from left to center as below:

#slide 1st image from right to center
#countdown 10 seconds
#slide 1st image from center to left and in the same time
#slide 2nd image from right to center
#countdown 10 seconds
#...

ffmpeg -loglevel quiet -loop 1 -i input.png -filter_complex "split=2[bg][slider];[bg]drawbox=c=black:t=fill[bg];[bg][slider]overlay=x='max(W-w*t,0)':y=0" -t 10 -y output.mp4

There is black background between two images, I want to the preious page keep slide from center to left and next page slide fron right to center, what can I do? enter image description here

Solution

  • some python script, partly adapted:

    #!/usr/bin/python3
import os

LST=[]
DIR="/mnt/public/upload/jpgs+audio/"
LSD=os.listdir(DIR)
LSD.sort()
for f in LSD:
  if (f.endswith(".jpg")):
    print(f)
    LST.append(f)

FLV=''
OFS=0        #start
XFO=10       #countdown in seconds
OFE=OFS+XFO  #end
CNT=0        #counter

INP=[]
f=DIR+LST[0]
INP.append(f' -loop 1 -i "{f}"')
PDV='[v0]'
FLT=f"""
[0]split=2[bg][v];
[bg]drawbox=c=black:t=fill[bg];
[bg][v]overlay=x='if(lt(t,{OFE}),max(W-w*t,0),max(0-w*(t-{OFE}),0-W))'{PDV};
"""
OFS+=XFO
OFE=OFS+XFO

for CNT in range(1, len(LST)):
  FLV+=f'{PDV}'
  PDV=f'[v{CNT}]'
  FLV+=f"""[{CNT}]overlay=x='if(between(t,{OFS},{OFE}),max(W-w*(t-{OFS}),0),max(0-w*(t-{OFE}),0-W))'{PDV};
"""
  f=DIR+LST[CNT]
  INP.append(f' -loop 1 -i "{f}"')
  OFS+=XFO
  OFE=OFS+XFO

OFS+=2
s='ffmpeg'
for t in INP:
  s=s+t
s=s+f' -filter_complex "{FLT}{FLV}" -map {PDV} -t {OFS} output.mp4 -y'
print(s)
os.system(s)
os.system(f'mpv output.mp4')