Change image overlay on demand

Question

I need your help. I stream to Twitch with this Command:

ffmpeg -i input.mp4 -i image.jpg -filter_complex \'overlay=x=10:x=10\' -s \\
  1920x1200 -framerate 1         


        

Answer 1

Add the -f image2 -loop 1 input options for the image input, then atomically replace image.jpg when desired such as by using mv.

Basic example:

ffmpeg -i input.mp4 -f image2 -loop 1 -i image.jpg -filter_complex overlay output.mp4

Streaming example:

ffmpeg -re -i input.mp4 -f image2 -loop 1 -i image.jpg -filter_complex "overlay,format=yuv420p" -c:v libx264 -preset fast -g 50 -b:v 4000k -maxrate 4000k -bufsize 8000k -f flv 'rtmp://'