[FFmpeg-user] Problem with time-lapse

Michael Koch astroelectronic at t-online.de
Thu Sep 10 23:41:37 EEST 2020

Am 10.09.2020 um 19:10 schrieb Jippo12:
> Hi!
> Yes,  I was confused and didn't realize that ffmpeg can do all this :)
> because I first made a python script that creates star trails videos and
> they are copied when processing the next step.
> But for normal video, i use
> ffmpeg -i /mnt/ramdisk3g/workdir/%d.jpg -r 16 -vcodec mpeg4 -qsale 1 -y
> -filter:v "framestep=1,setpts=1.0*PTS" /mnt/ramdisk/mp4/
> So I left the image multiplying step (from the python side) and Now there
> is now only 1 of each image in the workdir. Dropped out tblend because it
> makes image blur or something.
> https://drive.google.com/file/d/1HfG9WsUtE70DZT62SsqIUeIiZ9ZMwvbR/view?usp=sharing
> I'm going to use the above to finish star trails videos later too.

You can also use the zoompan filter for duplicating the frames and then 
the framerate filter for crossfading between successive frames. I've 
described that in chapter 2.3 in my book:


More information about the ffmpeg-user mailing list