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Have an command to make slideshow mp4 from *.jpg files:

ffmpeg -r 1/3 -f concat -safe 0 -i <(ls -v *.jpg | sed "s|^|file '$PWD/|") -vf "scale='min(1920,iw)':min'(1080,ih)':force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2" -c:v libx264 -pix_fmt yuv420p -r 60 -preset slow -crf 14 slideshow.mp4

Need good effects from one jpg to another like morphing or just fade in fade out, not just "one picture 3 sec, next picture 3 sec, etc." OpenAI or ChatGPT little bit dummy for this problem, so need human knowledge and intellect :)

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  • A simple alternative is to use shotwell, which is installed by default in Ubuntu Desktop. You can choose between several transition styles, and need not create a video clip (which saves a lot of drive space.
    – sudodus
    Commented Oct 13, 2023 at 20:02
  • But I prefer an even simpler alternative, but without any fancy transitions, feh. I have two aliases, alias feha='feh -r -F -V -d -Z' and alias fehs='feh -r -F -V -d -Z -z -D 5' where fehs is a slideshow with random order of pictures. Modify according to man feh
    – sudodus
    Commented Oct 13, 2023 at 20:40
  • Thank you @sudodus but I need exactly mp4 file to make possibility view slideshow not only from Ubuntu but from mediaplayer, tv, smartphone etc.
    – DJArty
    Commented Oct 14, 2023 at 8:19
  • I have used Openshot to merge video clips and also show pictures. There are many nice transitions between clips and pictures available. I have only used it via a GUI. I don't know if / how you can run it in batch mode. - I have used ffmpeg several years ago, but never fiddled with fancy transitions. - Let us hope that an experienced ffmpeg user will see your question and help you.
    – sudodus
    Commented Oct 14, 2023 at 8:42

1 Answer 1

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I have done some research around this problem. Looks like it’s not easy to construct a one line command. Need a script with several steps describing the effects between each individual picture. Something with -loop 1 -i './01.jpg' -loop 1 -i './02.jpg' use filter_complex and something like setpts=PTS-STARTPTS,split=2[stream1out1][stream1out2];[stream2blurred][stream2raw] step by step.
This is useful github link with slideshow-scripts, e.g. blurred background, fade in/out, zoom in/out. But this scripts eat many memory, slow generation time, and big mp4 final size.
So looks like initial command not so bad for using as is.

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