[FFmpeg-user] Multiple overlays at specific times

Michael Koch astroelectronic at t-online.de
Sun Dec 17 00:22:02 EET 2023

Am 16.12.2023 um 19:51 schrieb emmanuel martin:
> I have two inputs that are the same image. The first one, I loop to create
> a video for 8 seconds. I also create two streams that I will overlay. The
> background is the normal video, and above it is the same video with a LUT
> (Look-Up Table) that I applied earlier. I make the top video appear as an
> overlay with a fade-in effect that lasts x seconds before reaching 100%. To
> create a 'flash' effect, I want to overlay instances of my base image
> (participant1.jpg) at different very close intervals. The first overlay
> displays, but not this one
> "[out][1]overlay=enable='between(t,3.25,3.26)'[outv]", and I can't figure
> out the reason.

Perhaps because the interval in the between() function is too short. 
Don't make the interval shorter than 1/framerate.


More information about the ffmpeg-user mailing list