[FFmpeg-user] Slide show with transition

[Michael Koch]

Am 17.11.2020 um 16:05 schrieb RAPPAZ Francois via ffmpeg-user:
> I have 15 JPEG file to be used for a slide (duration: 135 sec): Each image is display 9 seconds and without transition the mkv file is ok.
> I tried this for a transition 1 second long
>
> ffmpeg -y -framerate 1/9 -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^
> -vf zoompan=d=9:fps=1,framerate=fps=15:interp_start=0:interp_end=255:scene=100 ^
> -r 15 -vsync vfr -pix_fmt yuv420p output.mkv
>
> The transition is ok for the first 3 image then the slide jump to image at position 10 and that picture remains blocked...
> What am I doing wrong ?

this works for me:

rem  make 15 test images

ffmpeg -f lavfi -i testsrc2=size=vga:duration=15:rate=1 -y test%%2d.jpg


rem  make slideshow, each image is shown 9 sec + 1 sec crossfade

ffmpeg -i test%%02d.jpg -vf 
zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:interp_end=255:scene=100 
out.mp4

Michael