there is video.mp4 and logo.png, action: impose a logo from 60 to 64 seconds of video with a smooth appearance and fading:
ffmpeg -i video.mp4 -loop 1 -i logo.png -filter_complex "[1:v] fade=st=60:n=12:alpha=1, fade=out:st=64:n=12:alpha=1 [logo]; [0:v][logo] overlay=1:1" -y output.mp4 the problem is that the render continues indefinitely, copying the last frame of the original video and attaching it to the output video ... tell me where to dig ...
